Li7la3zr2o12 Solid State Electrolytes for Li-ion Battery
Ru-Shi Liu1*
1Department of Chemistry, National Taiwan University, Taipei, Taiwan
* presenting author:Ru-Shi Liu,
In the present report, Al-doped Li7La3Zr2O12 (LLZO) has been found to be more ionic conductive after applying voltammetric cycles to the solid electrolyte with Li|LLZO|Li configuration. Li deposition-dissolution signal was observed in I-V curves. Electrochemical impedance spectroscopy and Arrhenius plots were employed to test the electrochemical properties. Neutron diffraction techniques and X-ray photoelectron spectroscopy show structural evolution of LLZO during the voltammetric process. Increase in Li occupancy and rearrangement of O are the two conspicuous changes and they may be the mechanism behind the conductivity enhancement of LLZO. Cyclic voltammetry (CV) process can be potential technique to replace expensive doping method to boost the electrochemical performance of LLZO and applicable to all solid state Li ion batteries.

Keywords: Li7La3Zr2O12, Solid State Electrolytes, Li-ion Battery