Synthesis and properties of single-crystal Ni-rich cathode materials in Li-ion batteries

被引：27

作者：

Lu, Shi-jie ^{[1
,2
,3
]}

Liu, Yang ^{[1
,2
,3
]}

He, Zhen-jiang ^{[1
,2
,3
]}

Li, Yun-jiao ^{[1
,2
,3
]}

Zheng, Jun-chao ^{[1
,2
,3
]}

Mao, Jing ^{[4
]}

Dai, Ke-hua ^{[5
]}

机构：

[1] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China

[2] Cent South Univ, Natl Engn Lab High Efficiency Recovery Refractory, Changsha 410083, Peoples R China

[3] Cent South Univ, Minist Educ Adv Battery Mat, Engn Res Ctr, Changsha 410083, Peoples R China

[4] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

[5] Tianjin Normal Univ, Coll Chem, Tianjin 300387, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2021年 / 31卷 / 04期

基金：

中国国家自然科学基金;

关键词：

lithium-ion battery; cathode material; single-crystal; electrochemical performance; phase transformation; LITHIUM; PERFORMANCE; DEGRADATION; GENERATION; STABILITY;

D O I：

10.1016/S1003-6326(21)65562-0

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Single-crystal Ni-rich cathode material LiNi0.88Co0.09Al0.03O2 (SC) was synthesized by a high-temperature solid-state calcination method. Physicochemical properties of primary and delithiated SC samples were investigated by X-ray diffractometry, X-ray photoelectron spectroscopy, and transmission electron microscopy. Electrochemical performance was characterized by long-term cycling, cyclic voltammetry, and in-situ impedance spectroscopy. The results indicated that high temperature rendered layered oxides to lose lithium/oxygen in the interior and exterior, and induced cationic disordering. Besides, the solid-phase synthesis process promoted phase transformation for electrode materials, causing the coexisting multi-phase in a single particle. High temperature can foster the growth of single particles, but it caused unstable structure of layered phase.

引用

页码：1074 / 1086

页数：13

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