新一代高比能量锂离子电池富锂氧化物正极材料的研究进展<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.011.001

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Abstract Li-rich oxides xLi₂MnO₃·(1-x)LiMO₂(M=Co, Ni or Mn) with specific capacity of 250—300 mAh/g are pro-mising candidates cathode materials for high specific energy density lithium-ion batteries. In this review, the crystal structure, lithium insertion/extraction mechanism, and structural transformation of Li-rich oxide during the charge-discharge processes are introduced. The issues encountered by the material including the large initial irreversible capacity, fast voltage and capacity fading, as well as the inferior rate capability and low-temperature performance are also illustrated and discussed. Then, the synthesis and modification methods including surface coating, ion doping, morphology and crystal plane control, as well as the fabrication of lamellar phase-spinel intergrown structure for the materials are described. At last, from the view of both basic and applied research, the prospects of future development for Li-rich oxides cathode material are proposed.

Key words： lithium-ion battery high capacity cathode material Li-rich oxide

Published: 10 June 2017 Online: 2018-05-04

CLC number:	O646
	TM912

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	YANG Shifeng
	REN Wenfeng
	CHEN Jian

Cite this article:

YANG Shifeng,REN Wenfeng,CHEN Jian. Li-rich Oxides Cathode Materials: Towards a New Generation of Lithium-ion Batteries with High Energy Density[J]. Materials Reports, 2017, 31(11): 1-10.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.011.001 OR https://www.mater-rep.com/EN/Y2017/V31/I11/1

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