The Role of Zr Doping in Stabilizing Li[Ni0.6Co0.2Mn0.2]O2 as a Cathode Material for Lithium‐Ion Batteries

• DOI: 10.1002/cssc.201900500
• Publication Date: 2019-03-27T23:43:19Z
• Authors: Jonghyun Choi; Seung‐Yong Lee; Sangmoon Yoon; Kyeong‐Ho Kim; Miyoung Kim; Seong‐Hyeon Hong
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

Ni-rich layered LiNi1-x-y Cox Mny O2 systems are the most promising cathode materials for high energy density Li-ion batteries (LIBs). However, inevitably suffer from rapid capacity fading and poor rate capability owing to structural instability unstable surface side reactions. Zr doping has proven be an effective method enhance cycle performances by stabilizing structure increasing Li+ diffusion rate. Herein, effects of Zr-doping on stability kinetics thoroughly investigated in LiNi0.6 Co0.2 Mn0.2 (LNCM) material using atomic-resolution scanning transmission electron microscopy imaging, XRD Rietveld refinement, functional theory calculations. mitigates degree cation mixing, decreases transformation, facilitates resulting improved cyclic performance capability. Based obtained results, atomistic model is proposed explain LNCM materials.