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电化学 ›› 2015, Vol. 21 ›› Issue (2): 138-144.doi: 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) • 上一篇    下一篇

锂离子电池富锂锰基正极材料的研究进展

周罗增1,2,徐群杰1*,汤卫平2,靳雪1,袁小磊1   

  1. 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 出版日期:2015-04-28 发布日期:2014-12-31
  • 通讯作者: 徐群杰 E-mail:xuqunjie@shiep.edu.cn
  • 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-zeng1,2, XU Qun-jie1*, TANG Wei-ping2, JIN Xue1, YUAN Xiao-lei1   

  1. 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:2014-10-24 Revised:2014-12-18 Online:2015-04-28 Published:2014-12-31
  • Contact: XU Qun-jie E-mail:xuqunjie@shiep.edu.cn

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.

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

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.

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

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