Electrochemical Performance of Dual Doped Li4Ti5O10 for Use at Anodes of Lithium Ion Batteries

Wednesday, 27 May 2015
Salon C (Hilton Chicago)
D. Cetin, K. Hua, and S. Gopalan (Boston University)
Formation of solid electrolyte interphase (SEI) increases the cell internal impedance and reduces the charge rates in lithium ion batteries (LIB) and causes significant cell performance limitations.  Lithium titanate, Li4Ti5O10 , (LTO) is a promising lithium storage material for anodes that does not form SEI, but it suffers from poor charge and discharge rates which arise from low lithium ion and electron conductivity at operation temperatures.

In order to improve the performance of the LIB anode, ionic and electronic conductivities should be enhanced. We present a  novel approach in this work to simultaneously increase the ionic and electronic conductivities by dual doping of LTO.  Doped materials are synthesized at temperatures higher than 800°C and analyzed using electrochemical impedance spectroscopy.