Investigating structure evolution of near-zero strain lithium-rich cathode materials

Rapid capacity fade and voltage drop are the major problems for lithium-rich cathode materials. Through ion doping, surface coating and other means can effectively optimize the electrochemical performance. we synthesized a near-zero strain material through a dual-doping strategy to tackle the electrochemical performance degragation of Lithium-rich materials and enhance Li-ion diffusion kinetics. The aim of this proposal is to elucidate the structural and charge compensation degradation mechanism of this near-zero strain lithium-rich cathode materials. For this propose, samples cut-off at various voltages both before and after cycling are prepared for in-situ synchrotron X-ray diffraction (sXRD) via BM20 to investigate the effect of La-Ti dual-doping on the degradation of structure.