Improving the performance of Li-rich Mn-based cathode materials via combined surface modification with glacial acetic acid and Li3PO4

doi:10.1016/j.jelechem.2022.116250

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	Improving the performance of Li-rich Mn-based cathode materials via combined surface modification with glacial acetic acid and Li3PO4
	Feng, Wangjun; Huang, Zhaoyu; Li, Weixue
刊名	Journal of Electroanalytical Chemistry
	2022-07-15
卷号	917
关键词	Acetic acid Cathodes Crystal structure Efficiency Electric discharges Glacial geology Lithium compounds Morphology pH Phosphorus compounds Combined surface Discharge specific capacity Electrochemical performance Glacial acetic acid Li2MnO3 phase Lithium ions Morphology structures Surface-modification Treatment methods
ISSN号	1572-6657
DOI	10.1016/j.jelechem.2022.116250
英文摘要	The surface co-treatment with glacial acetic acid and lithium phosphate for Li-rich Mn-based cathode materials are carried out and systematically investigated. The results show that the combined surface treatment method is superior to any single treatment method. The treatment process of glacial acetic acid, a mono-organic weak acid, is mild and convenient and can improve the particle distribution of the material to make it more loosely distributed, and can effectively activate the Li2MnO3 phase without serious ring-breaking to the crystal structure of the material. In addition, the addition of lithium phosphate helps to reduce the side reaction with electrolytes and helps to replenish the loss of lithium ions during charging and discharging, thus increasing the diffusion efficiency and improving the stability of lithium ions. The electrochemical test results show that the first discharge specific capacity and coulomb efficiency of GP-LMR treated with combined glacial acetic acid and lithium phosphate surface at 0.1C current density increases from the original sample of 229.7 mAh·g−1, 69.25% to 289.7 mAg·g−1, 83.53%. In addition, the discharge specific capacities at higher current densities of 0.5C and 2C are 243.6 mAh·g−1 and 189.3 mAh·g−1, respectively. © 2022 Elsevier B.V.
WOS研究方向	Chemistry ; Electrochemistry
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000812238600013
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158450]
专题	理学院
作者单位	School of Science, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Feng, Wangjun,Huang, Zhaoyu,Li, Weixue. Improving the performance of Li-rich Mn-based cathode materials via combined surface modification with glacial acetic acid and Li3PO4[J]. Journal of Electroanalytical Chemistry,2022,917.
APA	Feng, Wangjun,Huang, Zhaoyu,&Li, Weixue.(2022).Improving the performance of Li-rich Mn-based cathode materials via combined surface modification with glacial acetic acid and Li3PO4.Journal of Electroanalytical Chemistry,917.
MLA	Feng, Wangjun,et al."Improving the performance of Li-rich Mn-based cathode materials via combined surface modification with glacial acetic acid and Li3PO4".Journal of Electroanalytical Chemistry 917(2022).