Publications

 

F.Schüth, R.-A.Eichel, "Reconstruction of the energy system - energy storage for the future", Physikjournal 10 (2014) 31

Today storage technologies already play an important role in the energy system, which will significantly change because of the expansion of fluctuating renewable energy sources. In an article of the Physikjournal (vol. 10, 2014, p. 31), the electricity system is analyzed and the role of current and future technologies for electrochemical storage are illuminated.

Link

 

Focus papers:

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• S. Foit, I.C. Vinke, L.G.J. de Haart, R.-A. Eichel: “Power-to-Syngas - an enabling technology for the transition of the energy system? Production of tailored synfuels and chemicals using renewably generated electricity”, Angew. Chem. Int. Ed. 56 (2017) 5402-5411
• J. Wandt, P. Jakes, J. Granwehr, H.A. Gasteiger, R.-A. Eichel: “Singlet Oxygen Formation during the Charging Process of an Aprotic Lithium–Oxygen Battery”, Angew. Chem. Int. Ed. 55 (2016) 6892-6895
• J. Wandt, C. Marino, H.A. Gasteiger, P. Jakes, R.-A. Eichel, J. Granwehr: “Operando electron paramagnetic resonance spectroscopy – formation of mossy lithium on lithium anodes during charge–discharge cycling”, Energy Environ. Sci. 8 (2015) 1358-1367
• F.Schüth, R.-A. Eichel: "Umbau des Energiesystems - Energiespeicher für die Zukunft", Physikjournal 10 (2014) 31
• R.-A. Eichel, P. Erhart, P Träskelin, K. Albe, H. Kungl, M.J. Hoffmann: „Formation of copper-oxygen vacancy dipole centers in lead titanate“, Phys. Rev. Lett. 100 (2008) 095504

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full list of publications:

(141) L. Raijmakers, D. Danilov, R.-A. Eichel, P.H.L. Notten: „A review on various temperature-indication methods for Li-ion batteries“, Appl. Energy 240 (2019) 918-945

(140) M.C. Paulus, A. Paulus, P.P.M. Schleker, R.-A. Eichel, P. Heitjans, J. Granwehr: „Experimental evidence for coupling of longitudinal 7Li-magnetization orders in the superionic conductor Li10GeP2S12”, J. Magn. Reson. 303 (2019) 57-66

(139) M. Oldenkotte, H. Kungl, R.-A. Eichel, K.A. Schönau, M. Kühlein, T. Bernard, M.J. Hoffmann, M. Hinterstein: “Influence of PbO Stoichiometry on the Properties of PZT Ceramics and Multilayer Actuators“, J. Am. Ceram. Soc. (2019) JACERS-43156.R1

(138) R. Schierholz, D. Kroeger, M. Gocyla, H. Tempel, H. Kungl, R.-A. Eichel: “The carbonization of Polyacrylonitrile-derived electrospun carbon nanofibers studied by in-situ Transmission Electron Microscopy”, RSC Adv. 9 (2019) 6267-6277

(137) S. Yu, S. Schmohl, Z. Liu, M. Hoffmeyer, N. Schön, F. Hausen, H. Tempel, H. Kungl, H.D. Wiemhöfer, R.-A. Eichel: „Insights on Layered Hybrid Solid Electrolyte and Its Application in High Energy-Density, Long-Lifespan All Solid–State Lithium-Ion Battery”, J. Mater. Chem. A 7 (2019) 3882-3894

(136) D. Li, H. Li, D. Danilov, L. Gao, X. Chen, Z. Zhang, R.-A. Eichel, Y. Yang, P.H.L. Notten: “Degradation Mechanisms of C6/LiNi0.5Mn0.3Co0.2O2 Li-ion Batteries Unraveled by Non-destructive and Post-mortem Methods”, J. Power Sources 416 (2019) 163-174

(135) V. Vibhu, S. Yildiz, I.C. Vinke, R.-A. Eichel, J.M. Bassat; L.G.J. de Haart: “High performance LSC Infiltrated LSCF Oxygen Electrode for High Temperature Steam Electrolysis Application”, J. Electrochem. Soc. 166 (2019) F102-F108

(134) A. Paulus, S. Kammler, S. Heuer, M.C. Paulus, P. Jakes, J. Granwehr, R.-A. Eichel: „Sol Gel vs. Solid State Synthesis of the Fast Lithium-Ion Conducting Solid State Electrolyte Li7La3Zr2O12 Substituted with Iron“, J. Electrochem. Soc. 166 (2019) A5403-A5409

(133) Arvid Niemöller, Peter Jakes, Rüdiger-A. Eichel, Josef Granwehr: “In-operando EPR Investigation of Redox Mechanisms in LiCoO2”, Chem. Phys. Lett. 716 (2019) 231-236

(132) M. Shviro, M. Gocyla, R. Schierholz, H. Tempel, H. Kungl, R.-A. Eichel, R. Dunin-Borkowski “In-situ Transmission Electron Microscopy of the Degradation of C-supported Pt-Ni Octahedra for the Oxygen Reduction Reaction and their final Transformation to Cubes”, Nanoscale 10 (2018) 21353

(131) C. Chen, J.F.M. Oudenhoven, D.L. Danilov, E. Vezhlev, L. Gao, N. Li, F.M. Mulder, R.-A. Eichel, P.H.L. Notten: “Degradation of Si-based all-solid-state Li-ion micro-batteries: A mechanistic Neutron Depth Profiling study”, Adv. Energy Mat. 8 (2018) 1801430

(130) S.S. Köcher, P.M. Schleker, M.F. Graf, R.-A. Eichel, K. Reuter, J. Granwehr, C. Scheurer: „Chemical-shift reference scale for Lithium solid-state NMR derived by first-principles DFT calculations“, J. Magn. Reson. 297 (2018) 33-41

(129) A. Niemöller, P. Jakes, R.-A. Eichel, J. Granwehr: “EPR Imaging of Metallic Lithium and its Application to Dendrite Localization in Battery Separators”, Scientific Reports 8 (2018) 14331

(128) S. Yu, Z. Liu, H. Tempel, H. Kungl, R.-A. Eichel: “Self-standing NASICON–type electrodes with high mass loading for fast cycling all-phosphate sodium-ion batteries”, J. Mater. Chem. A 6 (2018) 18304-18317

(127) R. Sun, P. Jakes, S. Taranenko, H. Kungl, R.-A. Eichel: “Monitoring the reaction between Lithium Manganese Spinel and Li2MnO3 during heat treatment using Electron Paramagnetic Resonance spectroscopy”, Solid State Ionics 325 (2018) 201-208

(126) M.C. Paulus, M.F. Graf, P.P.R.M.L. Harks, A. Paulus, P.P.M. Schleker, P.H.L. Notten, R.-A. Eichel, J. Granwehr: “Investigation of the Li ion conduction behavior in the Li10GeP2S12 solid electrolyte by two-dimensional T1-spin alignment echo correlation NMR”, J. Magn. Reson. 294 (2018) 133-142

(125) S. Yu, A. Mertens, H. Tempel, R. Schierholz, H. Kungl, R.-A. Eichel: “Monolithic All-Phosphate Solid-State Lithium-Ion Battery with Improved Interfacial Compatibility”, ACS Appl. Mater. Interfaces 10 (2018) 22264-22277

(124) D. Li, H. Li, D. Danilov, L. Gao, J. Zhou, R.-A. Eichel, Y. Yang, P.H.L. Notten: “Temperature-dependent Cycling Performance and Ageing mechanisms of C6/LiNi1/3Mn1/3Co1/3O2 Batteries”, J. Power Sources 396 (2018) 444-452

(123) S.A. Kayser, A. Mester, A. Mertens, P. Jakes, R.-A. Eichel, J. Granwehr: „Long-run in-operando NMR to investigate the evolution and degradation of battery cells“, Phys. Chem. Chem. Phys. 20 (2018) 13765-13776

(122) X. Wu, M. Meledina, F. Rohman, H. Tempel, R. Schierholz, H. Kungl, J. Mayer, R.-A. Eichel: “Analysis of the effects of different carbon coating strategies on structure and electrochemical behavior of LiCoPO4 material as a high-voltage cathode electrode for lithium ion batteries”, Electrochim. Acta 279 (2018) 108-117

(121) Ö. Aslanbas, Y.E. Durmus, H. Tempel, F. Hausen, Y. Ein-Eli, H. Kungl, R.-A. Eichel: „Electrochemical studies and mixed potential theory of ionic liquid metal-air based batteries utilizing Al/Si alloy anodes“, Electrochim. Acta 276 (2018) 399-411

(120) S. Yang, D.O. Schmidt, A. Khetan, F. Schrader, M. Homberger, M. Noyong, A. Paulus, H. Kungl, R.-A. Eichel, H. Pitsch, U. Simon: „Electrochemical Performance and Electronic Charge Transport Properties of Nanostructured LiNi0.5Mn1.5O4 Obtained from Polyol-Mediated Synthesis“, Materials 11 (2018) 806-825

(119) J. Wandt, P. Jakes, J. Granwehr, R.-A. Eichel, H. Gasteiger: “Quantitative and Time Resolved Detection of Lithium Plating and Reintercalation on Graphite Anodes in Lithium Ion Batteries”, Materials Today 21 (2018) 231-240

(118) R. Sun, P. Jakes, J. Granwehr ,H. Kungl, R.-A. Eichel: “Secondary-Phase Formation in Spinel-type LiMn2O4-Cathode Materials for Lithium-Ion Batteries – Quantitative determination of Li2MnO3 trace amounts by Electron Paramagnetic Resonance Spectroscopy”, Appl. Magn. Reson. 49 (2018) 415-427

(117) H. Weinrich, M. Gehring, H. Tempel, H. Kungl, R.-A. Eichel: „Impact of the charging conditions on the discharge performance of rechargeable iron-anodes for alkaline iron-air batteries“, J. Appl. Electrochem. 48 (2018) 451-462

(116) Y.E. Durmus, S.S. Montiel Guerrero, Ö. Aslanbas, H. Tempel, F. Hausen, L.G.J. de Haart, Y. Ein-Eli, R.-A. Eichel, H. Kungl: “Investigation of the Corrosion Behavior of highly As-doped Crystalline Si in Alkaline Si–air Batteries”, Electrochim. Acta 265 (2018) 292-302

(115) A. Niemöller, P. Jakes, S. Eurich, A. Paulus, Hans Kungl, R.-A. Eichel, J. Granwehr: “Monitoring local Redox Processes in LiNi0.5Mn1.5O4 Battery Cathode Material by in-operando EPR Spectroscopy”, J. Chem. Phys. 148 (2018) 014705

(114) D. Li, D.L. Danilov, B. Zwikirsch, M. Fichtner, Y. Yang, R.-A. Eichel, P.H.L. Notten: “Modeling the Degradation Mechanisms of C6/LiFePO4 Batteries”, J. Power Sources 375 (2018) 106-117

(113) H. Weinrich, J. Come, H. Tempel, H. Kungl, R.-A. Eichel, N. Balke: “Understanding the nanoscale Redox-Behavior of Iron-Anodes for Rechargeable Iron-Air Batteries”, Nano Energy 41 (2017) 706-716

(112) C. Chen, R.-A. Eichel, P.H.L. Notten: “Metal-organic chemical vapor deposition enabling all-solid-state Li-ion microbatteries – a short review”, J. Electroceram. (2017) DOI: JECR-D-16-00205R1

(111) A. Mertens, S. Yu, N. Schön, H. Tempel, R. Schierholz, D.C. Gündüz, F. Hausen, H. Kungl, J. Granwehr, R.-A. Eichel: „Superionic Bulk Conductivity in Li_1.3Al_0.3Ti_1.7(PO₄)₃ Solid Electrolyte”, Solid State Ionics 309 (2017) 180-186

(110) Y.E. Durmus, S. Jakobi, T. Beuse, Ö. Aslanbas, H. Tempel, F. Hausen, L.G.J. de Haart, Y. Ein-Eli, R.-A. Eichel, H. Kungl: “Influence of Dopant Type and Orientation of Silicon Anodes on Performance, Efficiency and Corrosion of Silicon–Air Cells with EMIm(HF)_2.3F Electrolyte”, J. Electrochem. Soc. 164 (2017) A2310-A2320

(109) V. Vibhu, S. Yildiz, S. Foit, K. Schiemann, I.C. Vinke, R.-A. Eichel, L.G.J. de Haart: „LSC Infiltrated LSCF Oxygen Electrode for High Temperature Steam Electrolysis“, ECS Transactions 78 (2017) 3283-3295

(108) S.R. Foit, L. Dittrich, V. Vibhu, I.C. Vinke, R.-A. Eichel, L.G.J. de Haart: “Co-Electrolysis, Quo Vadis?”, ECS Transactions 78 (2017) 3139-3147

(107) K. Schiemann, V. Vibhu, S. Yildiz, J. Mertens, I.C. Vinke, R.-A. Eichel, L.G.J. de Haart: “Chrome Poisoning of Non-Manganiferous Cathode Materials for Solid Oxide Fuel Cells”, ECS Transactions 78 (2017) 1027-1034

(106) M.F. Graf, H. Tempel, S.S. Köcher, R. Schierholz, C. Scheurer, H. Kungl, R.-A. Eichel, J. Granwehr: “Observing different modes of mobility in lithium titanate spinel by nuclear magnetic resonance”, RSC Adv. 7 (2017) 25276-25284

(105) L. Kröll, L.G.J. de Haart, I.C. Vinke, R.-A. Eichel: “Degradation Mechanisms in Solid Oxide Fuel and Electrolyzer Cells – Analytical Description of Nickel Agglomeration in a Ni/YSZ Electrode”, Phys. Rev. Appl. 7 (2017) 044007

(104) S. Foit, I.C. Vinke, L.G.J. de Haart, R.-A. Eichel: “Power-to-Syngas - an enabling technology for the transition of the energy system?”, Angew. Chem. Int. Ed. 56 (2017) 5402-5411

(103) S. Foit, I.C. Vinke, L.G.J. de Haart, R.-A. Eichel: “Power-to-Syngas – eine Schlüsseltechnologie für die Umstellung des Energiesystems?”, Angew. Chem. 129 (2017) 5488-5498

(102) P. Jakes, L. Kröll, A. Ozarowski, J. van Tol, D. Mikhailova, H. Ehrenberg, R.-A. Eichel: “Coordination of the Mn4+-Center in Layered Li[Co0.98Mn0.02]O2 Cathode Materials for Lithium-Ion Batteries”, Z. Phys. Chem. 231 (2017) 905-922

(101) S. Yu, A. Mertens, H. Kungl, R. Schierholz, H. Tempel, R.-A. Eichel: “Morphology-Property Relationships of Li3V2(PO4)3/C Cathode Materials Regarding to Rate Capability and Cycle Life in Lithium-Ion Batteries”, Electrochim. Acta 232 (2017) 310-322

(100) C. Chen, D. Li, L Gao, P.P.R.M.L. Harks, R.-A. Eichel, P.H.L. Notten: “Carbon-coated core-shell Li2S@C nanocomposites as high performance cathode material for Lithium-Sulfur batteries” J. Mater. Chem. A 5 (2017) 1428-1433

(99) S. Yu, A. Mertens, R. Schierholz, X. Gao, Ö. Aslanbas, J. Mertens, H. Kungl, H. Tempel, R.-A. Eichel: “An advanced all phosphate lithium-ion battery providing high electrochemical stability, high rate capability and long-term cycling performance", J. Electrochem. Soc. 164 (2017) A370-A379

(98) Y.E. Durmus, Ö. Aslanbas, S.A. Kayser, H. Tempel, F. Hausen, L.G.J. Bert de Haart, J. Granwehr, Y. Ein-Eli, R.-A. Eichel, H. Kungl: “Long run discharge, performance and efficiency of primary Silicon-air cells with alkaline electrolyte”, Electrochim. Acta 225 (2017) 215-224

(97) G. Teucher, T. Van Gestel, M. Krott, H.G. Gehrke, R.-A. Eichel, S. Uhlenbruck: “Processing of Al-doped ZnO protective thin films on aluminum current collectors for lithium ion batteries”, Thin Solid Films 619 (2016) 302-307

(96) S. Foit, I.C. Vinke, L.G.J. de Haart, R.-A. Eichel: “Power-to-Syngas - an enabling technology for the transition of the energy system? Production of tailored synfuels and chemicals using renewably generated electricity”, Angew. Chem. 128 (2016) DOI: 10.1002/anie.201607552

(95) P. Jakes, L. Kröll, A. Ozarowski, J. van Tol, D. Mikhailova, H. Ehrenberg, R.-A. Eichel: “Coordination of the Mn⁴⁺-Center in Layered Li[Co_0.98Mn_0.02]O₂ Cathode Materials for Lithium-Ion Batteries”, Z. Phys. Chem. (2016) DOI: 10.1515/zpch-2016-0909

(94) P. Jakes, H. Kungl, R. Schierholz, J. Granwehr, R.-A. Eichel: “Hydrogen interstitial defects in acceptor-type CuO-doped PbTiO₃ — Uptake and dissolution of water vapor and formation of (Cu-OH) defect complexes”, Appl. Phys. Lett. 109 (2016) 122904

(93) S. Yu, A. Mertens, X. Gao, D.C. Gunduz, R. Schierholz, S. Benning, F. Hausen, J. Mertens, H. Kungl, H. Tempel, R.-A. Eichel: “Influence of microstructure and AlPO₄ secondary-phase on the ionic conductivity of Li_1.3Al_0.3Ti_1.7(PO₄)₃ solid-state electrolyte”, Funct. Mat. Lett. 9 (2016) 1650066

(92) J. Xie, J.F.M. Oudenhoven, D. Li, C. Chen, R.-A. Eichel, P.H.L. Notten: “High Power and High Capacity 3D-Structured TiO₂ Electrodes for Lithium-Ion Microbatteries”, J. Electrochem. Soc. 163 (2016) A2385-A2389

(91) S.N. Agbo, T. Merdzhanova, S. Yu, H. Tempel, H. Kungl, R.-A. Eichel, U. Rau, O. Astakhov: “Cell-to-cell monolithic integration of a thin-film solar cell and lithium-ion accumulator”, J. Power Sources (2016) in print

(90) S. Yu, H. Tempel, R. Schierholz, Ö. Aslanbas, X. Gao, J. Mertens, L.G.J. de Haart, H. Kungl, R.-A. Eichel: “LiTi₂(PO₄)₃/C Anode Material with a Spindle-Like Morphology for Batteries with High Rate Capability and Improved Cycle Life”, Chem. Electro. Chem. (2016) DOI: 10.1002/celc.201600125

(89) S.N. Agbo, T. Merdzhanova, S. Yu, H. Tempel, H. Kungl, R.-A. Eichel, U. Rau, O. Astakhov: “Photoelectrochemical application of thin-film silicon triple-junction solar cell in batteries”, Phys. Status Solidi A 213 (2016) 1926-1931

(88) J. Wandt, P. Jakes, J. Granwehr, H.A. Gasteiger, R.-A. Eichel: “Singlet Oxygen Formation during the Charging Process of an Aprotic Lithium–Oxygen Battery”, Angew. Chem. Int. Ed. 55 (2016) 6892-6895

(87) J. Wandt, P. Jakes, J. Granwehr, H.A. Gasteiger, R.-A. Eichel: “Singlet Oxygen Formation during the Charging Process of an Aprotic Lithium–Oxygen Battery”, Angew. Chem. 128 (2016) 7006-7009

(86) A. Mertens, I.C. Vinke, H. Tempel, H. Kungl, L.G.J. de Haart, R.-A. Eichel, J. Granwehr: “Quantitative Analysis of Time-Domain Supported Electrochemical Impedance Spectroscopy Data of Li-Ion Batteries – Reliable Activation Energy Determination at Low Frequencies”, J. Electrochem. Soc. 163 (2016) H521-H527

(85) P. Jakes, J. Granwehr, H. Kungl, R.-A. Eichel: “Mixed Ionic–Electronic Conducting Li₄Ti₅O₁₂ as Anode Material for Lithium Ion Batteries with Enhanced Rate Capability – Impact of Oxygen Non-Stoichiometry and Aliovalent Mg²⁺-Doping Studied by Electron Paramagnetic Resonance”, Z. Phys. Chem. 229 (2015) 1439-1450

(84) J. Wandt, C. Marino, H.A. Gasteiger, P. Jakes, R.-A. Eichel, J. Granwehr: “Operando electron paramagnetic resonance spectroscopy – formation of mossy lithium on lithium anodes during charge–discharge cycling”, Energy Environ. Sci. 8 (2015) 1358-1367

(83) V.T. Santana, L. Walmsley, I. Fier, R.-A. Eichel, P. Jakes, I. Chumak, A. Ozarowski, J. van Tol, O.R. Nascimento: “Antiferromagnetic resonance of polycrystalline BiMn₂O₅ ”, Solid State Commun. 207 (2015) 40-43

(82) Jérôme Ackera,1, Hans Kungla,b,∗, Roland Schierholzb, Susanne Wagnera,Rüdiger-A. Eichelb, Michael J. Hoffmann: “Microstructure of sodium-potassium niobate ceramics sintered under highalkaline vapor pressure atmosphere”, J. Eur. Ceram. Soc. 34 (2014) 4213-4221

(81) L.A. Schmitt, H. Kungl, M. Hinterstein, L. Riekehr, H.J. Kleebe, M.J. Hoffmann, R.-A. Eichel, H. Fuess: “The Impact of Heat Treatment on the Domain Configuration and Strain Behavior in Pb[Zr,Ti]O₃ Ferroelectrics”, J. Am. Ceram. Soc. 98 (2015) 269-277

(80) P. Jakes, H. Kungl, R. Schierholz, R.-A. Eichel: “Analyzing the Defect Structure of CuO-Doped PZT and KNN Piezoelectrics From Electron Paramagnetic Resonance”, IEEE Trans. Ultrason. Ferroel. Frequ. Control 61 (2014) 1447-1455

(79) N. Kiziltas-Yavuz, A. Bhaskar, D. Dixon, M. Yavuz, K. Nikolowski, L. Lu, R.-A. Eichel, H. Ehrenberg: "Improving the rate capability of high voltage lithium-ion battery cathode material LiNi_0.5Mn_1.5O₄ by ruthenium doping", J. Power Sources 267 (2014) 533-541

(78) S. Yoon, A.E. Maegli, L. Karvonen, A. Shkabko, S. Populoh, K. Gałazka, L. Sagarna, M.H. Aguirre, P. Jakes, R.-A. Eichel, S.G. Ebbinghaus, S. Pokrant, A. Weidenkaff: “Synthesis, Crystal Structure, Electric and Magnetic Properties of LaVO_2.78N_0.10 ”, Z. Anorg. Allg. Chem. 640 (2014) 797-804

(77) M.B. Boeddinghaus, W. Klein, B. Wahl, P. Jakes, R.-A. Eichel, T.F. Fässler: "C₆₀ ^3– versus C₆₀ ^4– /C₆₀ ^2– – Synthesis and Characterization of Five Salts Containing Discrete Fullerene Anions", Z. Anorg. Allg. Chem. 640 (2014) 701-712

(76) P. Jakes, J. Zimmermann, H. von Seggern, A. Ozarowski, J. van Tol, R.-A. Eichel: “Eu²⁺-doped CsBr photostimulable X-ray storage phosphors – analysis of defect structure by high-frequency EPR”, Funct. Mat. Lett. 7 (2014) 1350073

(75) C. Jensen, J. van Slageren, P. Jakes, R.-A. Eichel, Emil Roduner: „Support Effects on Hydrogen Desorption, Isotope Exchange, Chemical Reactivity, and Magnetism of Platinum Nanoclusters in KL Zeolite“, J. Phys. Chem. C 117 (2013) 22732-22745

(74) B. Shvartsev, G. Cohn, H. Shasha, R.-A. Eichel, Y. Ein-Eli: "Reference electrode assembly and its use in the study of fluorohydrogenate ionic liquid silicon electrochemistry", Phys. Chem. Chem. Phys. 15 (2013) 17837-17845

(73) R.-A. Eichel, E. Erdem, P. Jakes, A. Ozarowski, J. van Tol, R.C. Hoffmann, J.J. Schneider: "Space-charge layer, intrinsic 'bulk' and surface complex defects in ZnO nanoparticles - a high-field Electron Paramagnetic Resonance study", Funct. Mat. Lett. 6 (2013) 1330004

(72) R.-A. Eichel*, H. Kungl and P. Jakes: "Defect structure of non-stoichiometric and aliovalently doped perovskite oxides", Mat. Tech. 28 (2013) 241-246

(71) R.-A. Eichel, E. Erünal, P. Jakes, S. Körbel, C. Elsässer, J. Acker, H. Kungl, M.J. Hoffmann: “Interactions of defect complexes and domain walls in CuO-doped ferroelectric (K,Na)NbO₃ ”, Appl. Phys. Lett. 102 (2013) 242908

(70) F. Stemme, M. Bruns, H. Geßwein, M. Schroeder, M. Sazegar, M.D. Drahus, R.-A. Eichel, F. Paul, C. Acucena, J.R. Binder: „Fabrication and characterization of iron and fluorine co-doped BST thin films for microwave applications“, J. Mater. Sci. 48 (2013) 3586-3596

(69) R.C. Hoffmann, M. Kaloumenos, S. Heinschke, E. Erdem, P. Jakes, R.-A. Eichel, J.J. Schneider: "Molecular precursor derived and solution processed indium-zinc oxide as a semiconductor in a field-effect transistor device. Towards an improved understanding of semiconductor film composition", J. Mater. Chem. C 1 (2013) 2577-2584

(68) G. Cohn, R.-A. Eichel, Y. Ein-Eli: "New insight into the discharge mechanism of silicon–air batteries using electrochemical impedance spectroscopy", Phys. Chem. Chem. Phys. 15 (2013) 3256-3263

(67) S. Schaab, M. Schulz, H. Fritze, E. Erdem, R.-A. Eichel, C. Rüscher, S. Hummelt, T. Granzow: “Influence of reducing atmosphere on the defect chemistry of lead lanthanum zirconate titanate 8/65/35”, Solid State Ionics 228 (2012) 56-63

(66) M.B. Boeddinghaus, B. Wahl, P. Jakes, R.-A. Eichel, T.F. Fässler*: “Simple synthesis for tetra anionic fullerene ions in solution – synthesis and single crystal X-ray structure determination of three new discrete C₆₀ ⁴⁻-Salts”, Z. Anorg. Allg. Chem. 638 (2012) 2205-2212

(65) F. Stemme, H. Geßwein, M. Schroeder, M.D. Drahus, M. Sazegar, J.R. Binder, R.-A. Eichel, F. Paul, J. Haußelt, M. Bruns: „Effects of thermal processing and iron doping in co-sputtered barium strontium titanate thin films“, J. Mat. Sci. 47 (2012) 6929-6938

(64) F. Stemme, H. Geßwein, M.D. Drahus, B. Holländer, C. Azucena, J.R. Binder, R.-A. Eichel, J. Haußelt, M. Bruns: „Characterization of non-stoichiometric co-sputtered Ba_0.6Sr_0.4(Ti_1-xFe_x)_1+xO_3-δ thin films“, Anal. Bioanal. Chem. 403 (2012) 643-650

(63) E. Erdem, S. Schaab, W. Jo, A. Ozarowski, J. van Tol, R.-A. Eichel: “High-frequency EPR analysis of MnO₂-doped [Bi_0.5Na_0.5]TiO₃-BaTiO₃ piezoelectric ceramics – manganese oxidation states and materials hardening”, Ferroelectrics 428 (2012) 116-121

(62) P. Jakes, G. Cohn, Y. Ein-Eli, H. Ehrenberg, R.-A. Eichel: „Limitation of discharge capacity and mechanisms of air-electrode deactivation in silicon-air batteries“, Chem. Sus. Chem. 5 (2012) 2278-2285

(61) P. Jakes, R.-A. Eichel: „Characterization of tetravalent vanadium functional centers in metal oxides derived from a spin-Hamiltonian analysis”, Mol. Phys. 110 (2012) 277–282

(60) P. Jakes, N. Blickhan, T. Jekewitz, A. Drochner, H. Vogel, H. Fuess, R.-A. Eichel: “Interplay between defect structure and catalytic activity in the Mo_10-xV_xO_y mixed oxide system”, Chem. Phys. Chem. 12 (2011) 3578-3583

(59) E. Erünal, P. Jakes, S. Körbel, J. Acker, H. Kungl, C. Elsässer, M.J. Hoffmann, R.-A. Eichel: “CuO-doped
NaNbO₃ anti-ferroelectrics – impact of aliovalent doping and non-stoichiometry on the defect structure and formation of secondary phases”, Phys. Rev. B 84 (2011) 184113

(58) M.D. Drahus, P. Jakes, E. Erdem, S. Schaab, J. Chen, M. Ozerov, S. Zvyagin, R.-A. Eichel: “Manganese-doped BiScO ₃ -PbTiO ₃ high-temperature ferroelectrics – defect structure and mechanism of enhanced electric resistivity”, Phys. Rev. B 84 (2011) 064113

(57) W. Jo, J.B. Ollagnier, J.L. Park, E.M. Anton, O.J. Kwon, C. Park, H.H. Seo, J.S. Lee, E. Erdem, R.-A. Eichel, J. Rödel: “CuO as a Sintering Additive for (Bi_1/2Na_1/2)TiO₃-BaTiO₃-(K_0.5Na_0.5)NbO₃ Lead-free Piezoceramics”, J. Eur. Ceram. Soc. 31 (2011) 2107-2117

(56) P. Jakes, E. Erdem, A. Ozarowski, J. van Tol, R. Buckhan, D. Mikhailova, H. Ehrenberg, R.-A. Eichel: “Local coordination of Fe³⁺ in Li[Co_0.98Fe_0.02]O₂ oxides as cathode material in lithium ion batteries – multi-frequency EPR and Monte-Carlo Newman-superposition analysis”, Phys. Chem. Chem. Phys. 13 (2011) 9344-9352

(55) E. Aksel, P. Jakes, E. Erdem, D.M. Smyth, A. Ozarowski, J. van Tol, J.L. Jones, R.-A. Eichel: “Processing of manganese-doped [Bi_0.5Na_0.5]TiO₃ ferroelectrics – reduction and oxidation reactions during calcination and sintering”, J. Am. Ceram. Soc. 94 (2011) 1363-1367

(54) M.D. Drahus, P. Jakes, E. Erdem, R.-A. Eichel: “Defect structure of the mixed ionic-electronic conducting Sr[Ti,Fe]O_x solid-solution system – change in iron oxidation states and defect complexation”, Solid State Ionics 184 (2011) 47-51

(53) A.K. Srivastava, M. Deepa, K.N. Sood, E. Erdem, R.-A.Eichel: “Shape selective growth of ZnO nanostructures: spectral and electrochemical response”, Adv. Mat. Lett. 2 (2011) 142-147

(52) E. Erdem, P. Jakes, R.-A. Eichel, J. Lin, D. Damjanovic: „Position of defects with respect to domain walls in Fe³⁺-doped Pb[Zr_0.52Ti_0.48]O₃ piezoelectric ceramics“, Appl. Phys. Lett. 98 (2011) 072907

(51) J. Seiffe, L. Gautero, M. Hofmann, J. Rentsch, R. Preu, S. Weber, R.-A. Eichel: „Surface passivation of crystalline silicon by plasma-enhanced chemical vapor deposition double layers of silicon-rich silicon oxynitride and silicon nitride “, J. Appl. Phys. 109 (2011) 034105

(50) R.-A. Eichel: “Structural and dynamic properties of oxygen vacancies in perovskite oxides – analysis of defect chemistry by modern multi-frequency and pulsed EPR techniques”, Phys. Chem. Chem. Phys. 13 (2011) 368-384

(49) E. Erdem, P. Jakes, S.K.S. Parashar, K. Kiraz, M. Somer, A. Rüdiger, R.-A. Eichel: “Defect structure in aliovalently-doped and isovalently-substituted ferroelectric PbTiO₃ nano-powders”, J. Phys. Condens. Matter 22 (2010) 345901

(48) W. Jo, E. Erdem, R.-A. Eichel, J. Glaum, T. Granzow, D. Damjanovic, J. Rödel: „Effect of Nb-donor and Fe-acceptor dopants in (Bi_0.5Na_0.5)TiO₃-BaTiO₃-(K_0.5Na_0.5)NbO₃ lead-free piezoceramics“, J. Appl. Phys. 108 (2010) 014110

(47) E. Aksel, E. Erdem, P. Jakes, J.L. Jones, R.-A. Eichel: “Defect structure and materials ’hardening’ in Fe₂O₃-doped [Bi_0.5Na_0.5]TiO₃ ferroelectrics”, Appl. Phys. Lett. 97 (2010) 012903

(46) J.J. Schneider, R.C. Hoffmann, J. Engstler, A. Klyszcz, E. Erdem, P. Jakes, R.-A. Eichel, L. Pitta-Bauermann, J. Bill: „Synthesis, Characterization, Defect Chemistry, and FET Properties of Microwave-Derived Nanoscaled Zinc Oxide”, Chem. Mater. 22 (2010) 2203-2212

(45) E. Erdem, P. Jakes, R.-A. Eichel, D.I. Woodward, I.M. Reaney: „Formation of (Ti’-V_O ^••)^• defect associates in BaTiO₃ ceramics heat-treated under reduced oxygen partial pressure conditions“, Funct. Mat. Lett. 3 (2010) 65-68

(44) E. Erünal, S. Körbel, C. Elsässer, J. Acker, H. Kungl, M.J. Hoffmann, R.-A. Eichel: “Defect structure of copper-doped potassium niobate ceramics”, Funct. Mat. Lett. 3 (2010) 19-24

(43) R.-A. Eichel, H. Kungl: „Recent Developments and Future Perspectives of Lead-Free Ferroelectrics”, Funct. Mat. Lett. 3 (2010) 1-4

(42) E. Erdem, R.-A. Eichel, C. Fetzer, I. Dezsi, S. Lauterbach, H.-J. Kleebe, S. Hummelt, A.G. Balogh: “Structure, Fe-solubility and symmetry in acceptor-doped PZT ceramics”, J. Appl. Phys. 107 (2010) 054109

(41) E. Erdem, K. Kiraz, M. Somer, R.-A. Eichel: „Sol-gel based synthesis of nano-sized Fe³⁺-doped PbTiO₃ powders“, J. Eur. Ceram. Soc. 30 (2010) 289-293

(40) A. Baldansuren, H. Dilger, R.-A. Eichel, J.A. van Bokhoven, E. Roduner: „Interaction and reaction of ethylene and oxygen on six-atom silver clusters supported on LTA zeolite “, J. Phys. Chem. C 113 (2009) 19623-19632

(39) R.-A. Eichel, E. Erünal, M.D. Drahus, D.M. Smyth, J. van Tol, J. Acker, H. Kungl, M.J. Hoffmann: “Local variations in polarization and covalent bonding at the morphotropic phase boundary in Cu²⁺-doped PZT and KNN ferroelectric functional ceramics”, Phys. Chem. Chem. Phys. 11 (2009) 8698-8705

(38) R.-A. Eichel, M.D. Drahus, P. Jakes, E. Erünal, E. Erdem, S.K.S. Parashar, H. Kungl, M.J. Hoffmann: “Defect structure and formation of defect dipoles in Cu²⁺-modified metal oxides derived from a spin-Hamiltonian parameter analysis”, Mol. Phys. 107 (2009) 1981-1986

(37) A. Baldansuren, R.-A. Eichel, E. Roduner: “Nitrogen oxide reaction with six-atom silver clusters supported on LTA zeolite”, Phys. Chem. Chem. Phys. 11 (2009) 6664-6675

(36) E. Erdem. V. Maas, A. Gembus, A. Schulz, V. Liebau-Kunzmann, C. Fasel, R. Riedel, R.-A. Eichel: “Defect structure in lithium-doped polymer-derived SiCN ceramics characterized by Raman and electron paramagnetic resonance spectroscopy” , Phys. Chem. Chem. Phys. 11 (2009) 5628-5633

(35) J. Kleebe, S. Lauterbach, L. Silvestroni, H. Kungl, M.J. Hoffmann, E. Erdem, R.-A. Eichel: „Formation of magnetic grains in ferroelectric Pb[Zr_0.6Ti_0.4]O₃ ceramics doped with Fe³⁺ above the solubility limit“, Appl. Phys. Lett. 94 (2009) 142901

(34) J.J. Schneider, R.C. Hoffmann, J. Engstler, S. Dilfer, A. Klyszcz, E. Erdem, P. Jakes, R.-A. Eichel: „Zinc oxide derived from single source precursor chemistry under chimie douce conditions: Formation pathway, defect chemistry and possible applications in thin film printing “, J. Mater. Chem. 19 (2009) 1449-1457

(33) L.X. Zhang, E. Erdem, X. Ren, R.-A. Eichel: „Reorientation of (Mn_Ti−V_O) defect dipoles in acceptor-modified BaTiO₃ single crystals: An electron paramagnetic resonance study“, Appl. Phys. Lett., 93 (2008) 202901

(32) I. Menapace, G. Mera, R. Riedel, E. Erdem, R.-A. Eichel, A. Pauletti, G.A. Appleby: „Luminescence of heat-treated silicon-based polymers: promising materials for LED applications“, J. Mater. Sci. 43 (2008) 5790–5796

(31) M.D. Drahus, E. Erdem, R.-A. Eichel, H. Kungl, M.J. Hoffmann, A. Ozarowski, H. van Tol, L.C. Brunel: „Defect structure in (Gd,Fe) co-doped ‘soft’ PZT 52.5/47.5 piezoelectric ceramics“, Funct. Mat. Lett. 1 (2008) 7-11

(30) E. Erdem, M. Drahus, R.-A. Eichel, A. Ozarowski, H. van Tol, L.C. Brunel: „Characterization of the functional center site in manganese-modified ferroelectric PbTiO₃ “, Ferroelectrics 363 (2008) 39-49

(29) E. Erdem, R.-A. Eichel, H. Kungl, M.J. Hoffmann, A. Ozarowski, H. van Tol, L.C. Brunel: „Characterization of internal bias fields in (La,Fe)-codoped PZT 52.5/47.5 piezoelectrics“, IEEE Trans. Ultrason. Frequ. Control 55 (2008) 1061-1068

(28) R.-A. Eichel, P. Erhart, P Träskelin, K. Albe, H. Kungl, M.J. Hoffmann: „Formation of copper-oxygen vacancy dipole centers in lead titanate“, Phys. Rev. Lett. 100 (2008) 095504

(27) R.-A. Eichel: “Nanoscale characterization of defect chemistry in acceptor-modified piezoelectric ceramics”, J. Am. Ceram. Soc. 91 (2008) 691-701

(26) R.-A. Eichel, R. Böttcher: “Characterization of the high-spin Mn²⁺-functional centre in BaTiO₃ by means of right-angle wiggling EPR spectroscopy”, Mol. Phys. 105 (2007) 2195–2201

(25) P. Erhart, R.-A. Eichel, P Träskelin, K. Albe: „Association of oxygen vacancies with impurity metal ions in lead titanate“, Phys. Rev. B 76 (2007) 174116

(24) E. Erdem, R.-A. Eichel, A. Ozarowski, H. van Tol, L.C. Brunel, H. Kungl, M.J. Hoffmann: „Effect of local symmetry-reduction in (La,Fe)-codoped PZT 40/60 piezoelectrics“, Phys. Scripta T129 (2007) 12-16

(23) K.A. Schönau, L.A. Schmitt, M. Knapp, H. Fuess, R.-A. Eichel, H. Kungl, M.J. Hoffmann: Nanodomain structure of morphotropic Pb[Zr_1-xTi_x]O₃ at its morphotropic phase boundary: Investigations from local to average structure, Phys. Rev. B 75 (2007) 184117

(22) R.-A. Eichel: “Defect chemistry and micro structure of oxide ferroelectrics – valence state, site of incorporation and mechanisms of charge compensation”, J. Electroceram. 19 (2007) 9-21

(21) E. Ramic, R.-A. Eichel, K.-P. Dinse, A. Titz, B. Schmidt: Complexation geometry of copper(II)-chelidamate - Multi-frequency pulsed electron paramagnetic resonance and electron nuclear double resonance, J. Phys. Chem. B 110 (2006) 20655-20663

(20) A. Gembus, B. Corzilius, R.-A. Eichel, K.-P. Dinse, S. Immel, D. Stumm, M. Flauaus, H. Plenio: Hemicarcerands and endohedral metal ion complexation - synthesis, EPR measurements and structures, J. Phys. Chem. B 110 (2006) 15012-15020

(19) H. Mestric, R.-A. Eichel, K.-P. Dinse, A. Ozarowski, J. van Tol, L.C. Brunel, H. Kungl, M.J. Hoffmann, K.A. Schönau, M. Knapp, H. Fuess: Iron-oxygen vacancy defect association in polycrystalline iron-doped PbZrO₃ antiferroelectrics - multi-frequency electron paramagnetic resonance and Newman superposition model analysis , Phys. Rev. B 73 (2006) 184105

(18) R.-A. Eichel, H. Mestric, H. Kungl, M.J. Hoffmann: Multi-frequency electron paramagnetic resonance analysis of polycrystalline gadolinium-doped PbTiO₃ - charge compensation and site of incorporation, Appl. Phys. Lett. 88 (2006) 122506

(17) X. Liu, H. Dilger, R.-A. Eichel, J. Kunstmann, E. Roduner: A small platinum cluster in NaY zeolite – characterization and hydrogen adsorption and desorption, J. Phys. Chem. B 110 (2006) 2013-2023

(16) R.-A. Eichel, A. Schweiger: Electron spin echo envelope modulation spectroscopy with g-value and orientation filters, Chem. Phys. Lett. 417 (2006) 222-229

(15) R.-A. Eichel, H. Mestric, K.-P. Dinse, A. Ozarowski, J. van Tol, L.C. Brunel, H. Kungl, M.J. Hoffmann: High-field, high-frequency EPR of paramagnetic functional centers in Cu ²⁺ - and Fe³⁺-modified polycrystalline Pb[Zr _x Ti _1-x ]O ₃ ferroelectrics, Magn. Reson. Chem. 43 (2005) S166-S173

(14) H. Mestric, R.-A. Eichel, T. Kloss, K.-P. Dinse, So. Laubach, St. Laubach, P.C. Schmidt, K.A. Schönau, M. Knapp, H. Ehrenberg: The nature of iron-oxygen vacancy defect centers in PbTiO₃ , Phys. Rev. B 71 (2005) 134109

(13) R.-A. Eichel, K.-P. Dinse, H. Kungl, M.J. Hoffmann, A. Ozarowski, J. van Tol, L.C. Brunel: Exploring the morphotropic phase boundary in copper(II)-modi fi ed Pb[Zr _0.54 Ti _0.46]O ₃ ferroelectrics, Appl. Phys. A 80 (2005) 51-54

(12) H. Mestric, R.-A. Eichel, K.-P. Dinse, A. Ozarowski, J. van Tol, L.C. Brunel: High-frequency EPR investigation of the Fe ³⁺ impurity center in polycrystalline PbTiO₃ in its ferroelectric phase, J. Appl. Phys. 96 (2004) 7440-7444

(11) R.-A. Eichel, H. Kungl, M.J. Hoffmann: Determination of functional center local environment in copper-modified Pb[Zr _0.54 Ti _0.46]O ₃ ceramics, J. Appl. Phys. 95 (2004) 8092-8096

(10) T. Schmauke, R.-A. Eichel, A. Schweiger, E. Roduner: Electron paramagnetic resonance studies of a platinum cluster in Linde L and faujasite zeolites, Phys. Chem. Chem. Phys. 5 (2003) 3076-3084

(9) R.-A. Eichel, J. Granwehr, A. Schweiger: Measurement of spin-lattice relaxation times in EPR with enhanced orientation selectivity, J. Magn. Reson. 162 (2003) 380-384

(8) S. Van Doorslaer, G. Jeschke, B. Epel, D. Goldfarb, R.-A. Eichel, B. Kräutler, A. Schweiger: Axial solvent coordination in “base-off” cob(II)alamin and related Co(II)-corrinates revealed by 2D-EPR, J. Am. Chem. Soc. 125 (2003) 5915-5927

(7) P. Jakes, N. Weiden, R.-A. Eichel, A. Gembus, K.-P. Dinse, C. Meyer, W. Harneit, A. Weidinger: EPR investigation of endohedral fullerenes N@C ₆₀ and N@C ₇₀ in a liquid crystal, J. Magn. Reson. 156 (2002) 303-308

(6) R.-A. Eichel, A. Schweiger: Coherence-Transfer Right-Angle Wiggling EPR, Mol. Phys. 100 (2002) 3661-3665

(5) R.-A. Eichel, A. Schweiger: Polarization-Transfer Electron-Zeeman resolved EPR, Chem. Phys. Lett. 358 (2002) 271-277

(4) C. Calle, R.-A. Eichel, C. Finazzo, J. Forrer, J. Granwehr, I. Gromov, W. Groth, J. Harmer, M. Kälin, W. Lämmler, L. Liesum, Z. Madi, S. Stoll. A. Schweiger: Electron Paramagnetic Resonance Spectroscopy, Chimia 55 (2001) 763-766

(3) R.-A. Eichel, A. Schweiger: Right-Angle Wiggling EPR Spectroscopy, J. Chem. Phys. 115 (2001) 9126-9135

(2) R.-A. Eichel, A. Schweiger: Electron-Zeeman resolved EPR Spectroscopy, J. Magn. Reson. 152 (2001) 276-287

(1) R.-A. Eichel, I. Egry: Surface tension and surface segregation of liquid cobalt-iron and cobalt-copper alloys, Z. Metallkd. 90 (1999) 371-375