Structural, electrochemical and thermal properties of LiNi08-yTiyCo02O2 as cathode materials for lithium ion battery

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	Structural, electrochemical and thermal properties of LiNi08-yTiyCo02O2 as cathode materials for lithium ion battery
	Liu, HS ; Li, J ; Zhang, ZR ; Gong, ZL ; Yang, Y ; Yang Y(杨勇)
刊名	http://dx.doi.org/10.1016/j.electacta.2003.11.001
	2004-03-15
关键词	X-RAY-DIFFRACTION SOL-GEL METHOD ELECTRODE MATERIALS PHYSICAL-PROPERTIES PERFORMANCE BEHAVIOR SYSTEM CELLS LINI0.8CO0.2O2 SUBSTITUTION
英文摘要	Multiple substitution compounds with the formula LiNi0.8-yTiyCo0.2O2 (0 less than or equal to y less than or equal to 0.1) were synthesized by sol-gel method using citric acid as a chelating agent. The effects of titanium substitution on the structural, electrochemical and thermal properties of the cathode materials are investigated. A solid solution phase (R-3m) is observed in the range of 0 less than or equal to y less than or equal to 0.1 for the titanium-doped materials. X-ray photoelectron spectroscopy (XPS) shows that there are Ni3+, Ni2+, Co3+, Co2+ and Ti4+ five transition metal ions in titanium-doped materials. Rietveld refinement of X-ray diffraction (XRD) patterns indicates that titanium substitution changes the materials' structure with different cationic distribution. An increase of the Ni/Co amount in the 3a Li site is found with the addition of titanium amount. An improved cycling performance is observed for titanium-doped cathode materials, which is interpreted to a significant suppression of phase transitions and lattice changes during cycling. The thermal stability of titanium-doped materials is also improved, which can be attributed to its lower oxidation ability and enhanced structural stability at delithiated state. (C) 2003 Elsevier Ltd. All rights reserved.
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88489]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Liu, HS,Li, J,Zhang, ZR,et al. Structural, electrochemical and thermal properties of LiNi08-yTiyCo02O2 as cathode materials for lithium ion battery[J]. http://dx.doi.org/10.1016/j.electacta.2003.11.001,2004.
APA	Liu, HS,Li, J,Zhang, ZR,Gong, ZL,Yang, Y,&杨勇.(2004).Structural, electrochemical and thermal properties of LiNi08-yTiyCo02O2 as cathode materials for lithium ion battery.http://dx.doi.org/10.1016/j.electacta.2003.11.001.
MLA	Liu, HS,et al."Structural, electrochemical and thermal properties of LiNi08-yTiyCo02O2 as cathode materials for lithium ion battery".http://dx.doi.org/10.1016/j.electacta.2003.11.001 (2004).