Anja Paulus

 

Preparation and electrochemical characterization of solid state electrolytes for lithium ion batteries

Crystal structure of the lithium ion conductor LLZ Copyright: A. Hoffmann Crystal structure of the lithium ion conductor LLZ

Due to the increasing usage of mobile electronic devices such as cell phones, laptops and tablets, batteries rise in importance. Further fields of interest are the change from fossil fuels to renewable energy sources which requires the temporary storage of energy excess and the use of batteries in medical devices. Among the efficient rechargeable batteries lithium ion batteries provide the highest known gravimetric and volumetric energy densities. Conventional batteries consist of an electrolyte containing toxic, flammable organic liquids which can lead to leakage of the battery. In order to overcome these safety issues solid state electrolytes could be an alternative to obtain powerful lithium ion batteries. Garnet type structures like LLZ (Li7La3Zr2O12) show promising properties regarding to lithium ion conduction and chemical stability.