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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

Comparative study of LiNiO_2, LiNi_(0-8)Co_(0.2)O_2 and LiNi_(0. 75)A1_(0. 25)O_2 for lithium-ion batteries
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摘要 The comparative study of LiNi_(0.8)Co_(0.2)O_2 and LiNi_(0.75)A_(0.25)O_2 wascarried out by X-ray diffraction (XRD) and electrochemical methods. The results show that Co and Aldoping suppress the phase transition during charge-discharge. The experiments indi cate thatLiNi_(0.75)Al_(0.25)O_2 has the better cycle-ability and over-charge resistance comparing withLiNi_(0.8)Co_(0.2)O_2. The interfacial behavior was studied by use of electrochemical impedancespectroscopy (EIS). The results show that LiNi_(0.75)Al_(0.25)O_2 has a slightly larger polarizationcharacter than LiNi_(0.8)Co_(0.2)O_2. The comparative study of LiNi_(0.8)Co_(0.2)O_2 and LiNi_(0.75)A_(0.25)O_2 wascarried out by X-ray diffraction (XRD) and electrochemical methods. The results show that Co and Aldoping suppress the phase transition during charge-discharge. The experiments indi cate thatLiNi_(0.75)Al_(0.25)O_2 has the better cycle-ability and over-charge resistance comparing withLiNi_(0.8)Co_(0.2)O_2. The interfacial behavior was studied by use of electrochemical impedancespectroscopy (EIS). The results show that LiNi_(0.75)Al_(0.25)O_2 has a slightly larger polarizationcharacter than LiNi_(0.8)Co_(0.2)O_2.
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》 CSCD 2002年第6期448-452,共5页 北京科技大学学报（英文版）
关键词 lithium-ion batteries lithium nickel oxide cathod materials lithium-ion batteries lithium nickel oxide cathod materials
分类号 TM911 [电气工程—电力电子与电力传动]
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参考文献8

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Journal of University of Science and Technology Beijing
2002年 第6期

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