PREPARATION OF Li3Mn04: Mn(+5 ) ELECTRODES AND THEIR ELECTROCHEMICAL PROPERTIES

摘要：

0.5Li2MnO3·0.5LiMnxNiyFe(1-x-y)O2(0.3≤x≤0.5, 0.4≤y≤0.5) cathode materials have been synthesized by a carbonate co-precipitation method. The impacts of Fe doping on the structure and electrochemical performances of 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2 were characterized by means of powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), galvanostatic charge/discharge test. The results show that the as-obtained samples can be indexed as a single α-NaFeO2 phase and exhibit no obvious Fm-3m rock salt. Noted that Fe substituted 0.5Li2MnO3·0.5LiMn0.5Ni0.5O2 materials show good cycleability in cutoff voltage between 2.5 and 4.8V. Moreover 0.5Li2MnO3·0.5LiMn0.4Ni0.4Fe0.1O2 sample delivers the improved discharge capacity of >200mAh/g with an increase of cycle number.

关键词： lithium secondary batteries cathode materials Fe-doping

作者: Min Gao Fang Lian Dong Li Weihua Qiu

作者单位: Department of inorganic nonmetal materials, School of materials science and engineering, University Department of inorganic nonmetal materials, School of materials science and engineering, University

会议类型: 国际会议

会议名称: The 12th Asian Conference on Solid State Ionics(第十二届亚洲固态离子学会议暨第十五届中国固态离子学会议)

会议地点: 武汉

会议语种:英文

页码: 779-786

在线出版日期: 2010-05-02（万方平台首次上网日期，不代表论文的发表时间）