Obstacles toward unity efficiency of LiNi_1-2xCo_xMn_xO₂ (x = 0 ∼ 1/3) (NCM) cathode materials: Insights from ab initio calculations

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• 作者：Chaoping Liang^a ; Roberto C. Longo^a ; Fantai Kong^a ; Chenxi Zhang^a ; Yifan Nie^a ; Yongping Zheng^a ; Jeom-Soo Kim^b ; Sanghoon Jeon^c ; SuAn Choi^c ; Kyeongjae Cho^a ; ^{kjcho@utdallas.edu}
• 关键词：Li-ion battery ; LiNi1-2xCoxMnxO2 (NCM) cathodes ; Unity efficiency ; Degradation mechanism ; Electrochemical properties ; Depth of charge
• 刊名：Journal of Power Sources
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：340
• 期：Complete
• 页码：217-228
• 全文大小：2510 K
• 卷排序：340

文摘

Lattice distortion, Oxygen evolution, Li-Ni exchange cause degradation of cathode. Ni concentration and Depth of Charge are key factors affecting the degradation. Optimal composition of NCM is within the region of 1/10 < x < 1/4 (50–80% of Ni). Doping is an effect way to alleviate the oxygen evolution at low Ni content. Coating may suppress lattice distortion and Li-Ni exchange at high Ni content.