锂离子电池富锂锰基正极材料的研究进展

周罗增; 徐群杰; 汤卫平; 靳雪; 袁小磊

doi:10.13208/j.electrochem.141042

电化学 >

2015 , Vol. 21 >Issue 2: 138 - 144

DOI: https://doi.org/10.13208/j.electrochem.141042

化学电源及其材料近期研究专辑（客座编辑：复旦大学夏永姚教授）

锂离子电池富锂锰基正极材料的研究进展

周罗增 ,
徐群杰 ,
汤卫平 ,
靳雪 ,
袁小磊

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1. 上海市电力材料防护与新材料重点实验室，上海电力学院，上海 200090；2. 上海空间电源研究所，上海 200245

收稿日期: 2014-10-24

修回日期: 2014-12-18

网络出版日期: 2014-12-31

基金资助

上海市自然科学基金项目（No. 15ZR1418100）和上海市企业自主创新专项项目（No. CXY-2014-24）资助

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Research Progress of Mn-based Lithium-rich Cathode Materials for Li-ion Batteries

ZHOU Luo-Zeng ,
XU Qun-Jie ,
TANG Wei-Ping ,
JIN Xue ,
YUAN Xiao-Lei

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1. Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China; 2. Shanghai Institute of Space Power-sources, Shanghai 200245, China

Received date: 2014-10-24

Revised date: 2014-12-18

Online published: 2014-12-31

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摘要

随着新能源如电动汽车、储能电站的蓬勃发展，人们对下一代高性能锂离子电池的能量密度、功率密度和循环寿命提出了更高的要求. 而富锂锰基正极材料xLi₂MnO₃·(1-x)LiMO₂（0 < x < 1，M = Mn、Co、Ni…）具有可逆比容量高（240 ~ 280 mAh·g^-1，2.0 ~ 4.8 V）、电化学性能较佳、成本较低等优点，已吸引了研究者的关注，有望成为下一代锂离子电池用正极材料. 本实验室采用固相法和溶胶-凝胶法制备不同的富锂锰基正极材料，其中，溶胶-凝胶法制得的Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂电极首周期放电比容量277.3 mAh·g^-1，50周期循环后容量272.8 mAh·g^-1，容量保持率98.4%. 本文重点结合本实验室的研究工作，对新型富锂锰基正极材料xLi₂MnO₃·(1-x)LiMO₂的结构、合成、电化学性能改性和充放电机理等进行总结与评述.

关键词： 锂离子电池；富锂正极材料；共沉淀法； xLi₂MnO₃·; (1-x)LiMO₂

本文引用格式

周罗增 , 徐群杰 , 汤卫平 , 靳雪 , 袁小磊 . 锂离子电池富锂锰基正极材料的研究进展[J]. 电化学, 2015 , 21(2) : 138 -144 . DOI: 10.13208/j.electrochem.141042

Abstract

With rapid development of new energy industry like electric vehicles and energy storage station, these fields highly demand the next generation of high performance Li-ion battery systems with stronger energy density, higher power density, and longer cycling life. Lithium-rich Mn-based cathode materials, xLi₂MnO₃·(1-x)LiMO₂(M=Mn, Co, Ni...), have become the hot topic and drawn attentions of scholars worldwide because of their high reversible capacity exceeding 240 mAh·g^-1, excellent electrochemical properties, and low cost, which makes them most promising cathode material candidates for next Li-ion battery system. The cathode material Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ prepared in our laboratory shows high initial discharge capacity of 277.3 mAh·g^-1 with retention of 98.4% after 50 cycles. Based on our previous works, we have introduced and reviewed the structures, preparation methods, and charge/discharge mechanisms of these lithium-rich Mn-based cathode materials xLi₂MnO₃·(1-x)LiMO₂.

Key words： Li-ion battery; lithium-rich cathode materials; co-precipitation method; xLi₂MnO₃·(1-x)LiMO₂

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