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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

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

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[Li0.2Mn0.54Ni0.13Co0.13]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.

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[Li0.2Mn0.54Ni0.13Co0.13]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.
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