期刊
CERAMICS INTERNATIONAL
卷 42, 期 7, 页码 8833-8838出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.02.128
关键词
Lithium ion battery; Cathode materials; Li-rich Mn-based; Mg doping
资金
- National Natural Science Foundation of China [51472107, 51202087, 51364009]
- Research Startup Foundation of Jishou University [jsdxrcyjkyxm201409]
- Collaborative Innovation Center of Manganese Zinc-Vanadium Industrial Technology (the Plan of Hunan Province)
- Research Foundation of Jishou University of Hunan Province, China [15JDY024, JDSTLY1503, JDZ201503, 2015[20], JDST201508]
- Aid program (Environment and Energy Materials and deep processing of mineral resources in Wuling Mountain) for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province [2014[107]]
- Planned Science and Technology Project of Science and Technology Bureau of Xiangxi Tujia & Miao Autonomous Prefecture
Mg-doped Mn-rich carbonate precursors (Ni0.15Co0.15Mn0.7CO3) and Li-rich Mn-based cathode materials (Li1.2Ni0.12Co0.12Mn0.56O2) have been synthesized by a carbonate precipitation method. The influence of Mg substitution for Ni, Co and Mn on the structural and electrochemical performance of Li1.2Ni0.12Co0.12Mn0.56O2 has been investigated. XRD results of Mg-doped Li1.2Ni0.12Co0.12Mn0.56O2 powders show that they exhibit similar XRD patterns as those of Li-rich Mn-based cathode materials. Electrochemical charge/discharge measurements in lithium-ion cells indicate the Mg-doped samples to exhibit lower discharge capacity but superior rate capability. The Mg substituted for Mn with 0.03 is found to be the most effective in improving the electrochemical performance. Li1.2Ni0.12Co0.12Mn0.536Mg0.024O2 (Li1.5Ni0.15Co0.15Mn0.67Mg0.0.O2) displays a high reversible capacity of 205.4 mA h g(-1) at 0.1 C. EIS results show that Mg doping decreases the charge-transfer resistance and enhances the reaction kinetics, which is considered to be the major factor for higher rate performance. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据