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Synthesis and properties of single-crystal Ni-rich cathode materials in Li-ion batteries
被引:26
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
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.
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页码:1074 / 1086
页数:13
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