Robust Lithium Ion Batteries for Electric Vehicle

Abstract

With their high energy density, long cycle life and variable charge–discharge rates, rechargeable Li-ion batteries are preferred to power electric vehicles by car manufacturers. However, the use of liquid electrolyte in these batteries can lead to fires and limit the performance due low thermal stability, decomposition and formation of dendrites leading to shorting. These issues are addressed by using solid state electrolyte in addition to improving safety and durability. The most studied and promising solid state electrolyte is Garnet-type Li7La3Zr2O12 (LLZO). Current challenges faced by an all-solid-state electrolyte are optimum processing conditions to achieve high density, doping and understanding the nature of interface formed between solid electrolyte and the electrodes. The state-of-art developments in the solid electrolyte along with preliminary results in processing of electrolyte will be discussed and presented.