Enhancement on inter-layer stability on Na-doped LiNi0.6Co0.2Mn0.2O2 cathode material

被引：24

作者：

Feng, Liwei ^{[1
]}

Liu, Yan ^{[1
]}

Wu, Lei ^{[1
]}

Qin, Wenchao ^{[1
]}

Yang, Zihao ^{[1
]}

机构：

[1] Shanghai Inst Technol, Sch Mat Sci & Engn, Shanghai 200235, Peoples R China

来源：

POWDER TECHNOLOGY | 2021年 / 388卷

关键词：

Na concentrations; Inter-layer stability; LiNi0.6Co0.2Mn0.2O2; cathodes; Lithium-ion batteries; OXIDE CATHODES; ELECTROCHEMICAL PERFORMANCE; HIGH-ENERGY; ION; LINI0.8CO0.15AL0.05O2; CAPACITY; IMPROVE; CYCLE;

D O I：

10.1016/j.powtec.2021.04.070

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The LiNi0.6Co0.2Mn0.2O2 cathode material with gradient modification of sodium ion doping is synthesized by milling-spray and calcination two step method. XRD, EDS and XPS reveal that Na+ doping in the lattice enlarges the lithium interlayer spacing and reduces the level of cation mixing, which can be conducive to the formation of regular interlayer structure. Na-doped sample shows a high capacity (179mAh g(-1) at 0.2C), superior rate property (152.6 mAh g(-1) at 1C, 133.9 mAh g(-1) at 5C) and excellent cyclic stability at high current density (82.8% after 150 cycles at 1C and 73.7% after 150 cycles at 5C). Due to the pillaring effect of Na ions with large radius, the modified samples can still maintain a complete spherical morphology after long-term cycling. (C) 2021 Elsevier B.V. All rights reserved.

引用

页码：166 / 175

页数：10

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