Zhiyuan Wang

 

Efficient and bifunctional nano-scale electro-catalysts for metal-air batteries

The structure of rechargeable metal-air battery Copyright: Z. Wang

Metal-air batteries represent one class of promising power sources for applications in next generation electronics as their remarkable high theoretical energy output. But now the metal-air batteries are still in their stages of development due to existing technical difficulties, as there are the low utilization efficiency of the anode and the sluggish kinetics of the cathode. Electro-catalysts utilized for the oxygen reduction reaction (ORR) and oxygen evolution reactions (OER) have been demonstrated to be crucial for improving the power density, cycling capability, and energy conversion efficiency of metal-air batteries. In recent years, great efforts have been made in the development of electro-catalysts for rechargeable metal-air batteries [1-4].

My PhD project focuses on the design, synthesis and characterization of nanostructured perovskite-type (ABO3/A1-xA’xB1-yB’y) mixed-transition metal oxide-carbon hybrid materials for the use as bifunctional catalysts at the air-electrode of metal-air batteries. Developing inexpensive, corrosion-resistant, high active bifunctional catalysts for both ORR and OER is crucial for the function of metal-air batteries as secondary energy storage batteries. Of all the electro-catalysts used for air-electrode, nanostructured perovskite-type (ABO3/A1-xA’xB1-yB’y) mixed-transition metal oxide-carbon hybrids show high activity for ORR and OER [5-7], promising for the metal-air batteries.

References:

[1] B. Lim, M. Jiang, P. H. C. Camargo, E. C. Cho, J. Tao, X. Lu,Y. Zhu and Y. N. Xia, Science, 2009, 324, 1302.

[2] W.Yang, T. P. Fellinger and M. Antonietti, J. Am. Chem. Soc., 2011, 133, 206.

[3] M. S. El-Deab and T. Ohsaka, Angew. Chem., Int.Ed., 2006, 45, 5963.

[4] F. Jaouen, E. Proietti, et al., Energy Environ.Sci., 2011, 4, 114.

[5] Y. M. Chang, P. W. Wu, C. Y. Wu and Y. C. Hsieh, J. Power Sources, 2009, 189, 1003.

[6] J. Suntivich, K.J. May, H. A. Gasteiger, J. B. Goodenough and Y. Shao-Horn, Science, 2011, 334, 1383.

[7] J. J. Xu, D. Xu, Z. L. Wang, H. G. Wang, L. L. Zhang and X. B. Zhang, Angew.Chem., Int. Ed., 2013, 52, 3887.