Comparative study of LiNiO_2, LiNi_(0.8)Co_(0. 2)O_2 and LiNi_(0.75)Al_(0.25)O_2 for lithium-ion batteries

查看全文 作　　者：Chuangang Lin, Weihua Qiu, Zhimin Li, Jialing Hong, Huanyu Hu, and Zhongqin LuLaboratory on Solid State Ionics, University of Science and Technology Beijing, Beijing 100083, China 出　　处：《Journal of University of Science and Technology Beijing》索引2002年第9卷第6期,共5页 摘　　要：The comparative study of LiNi0.8Co0.2O2 and LiNi0.75Al0.25O2 was carried out by X-ray diffraction (XRD) and electrochemical methods. The results show that Co and Al doping suppress the phase transition during charge-discharge. The experiments indicate that LiNi0.75Al0.25O2 has the better cycle-ability and over-charge resistance comparing with LiNi0.8Co0.2O2. The interfacial behavior was studied by use of electrochemical impedance spectroscopy (EIS). The results show that LiNi0.75Al0.25O2 has a slightly larger polarization character than LiNi0.8Co0.2O2. 关 键 词：锂离子电池 锂镍氧化物 阴极材料