Structure and Properties of MnO2 coated Spherical LiLi0.2Mn0.43Ni0.185Co0.185O2
Spherical hydrxide precursor was prepared by co precipitation method and then spherical lithium-rich layered material LiLi0.2Mn0.43Ni0.185Co0.185O2 was obtained by solid state calcination method.Nano MnO2 was used to modify the surface of the cathode.Their structures and properties of the materials were investigated by X-ray diffraction (XRD),scanning electron microscope (SEM),Brunauer-Emmett-Teller (BET) and constant current charge/discharge methods.The results of the experiments indicate that the structure and morphology of LiLi0.2Mn0.43Ni0.185Co0.185O2 inherited from its precursor.2.43g/cm3 and 0.52m2/g of its BET surface area and the tap density were attained respectively.The comprehensive electrochemical performances of the nano MnO2 coating cathodes were much better than that of pure cathode,and achieved the best one while 8% MnO2 coating.The first columbic efficiency,0.1C and 0.5C discharge capacity improved from 52.6%,187.3 and 144.9 mAh/g (pure cathode)to 71.3%,236.9 and 201.7 mAh/g (coating one) respectively.
Lithium ion battery Li-rich cathode material coated MnO2
Fan Guangxin Li Huilian Dai Shupu Zhang Chuanxiang Xu Yongjun Yin Zhengzhong Chang Zhaorong Guan Xuemao
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000; Henan Kel School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000 Henan Kelong New Energy Co., LTD, Xinxiang 453000
国际会议
上海
英文
101-101
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）