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题名: Capacity fading of pulsed-laser deposited HT-LiCoO2 films cycled in LiClO4/PC
作者: Zhang, Y.2;  Chung, C. Y.1;  Sun, L. X.3;  Zhu, M.2, 3
通讯作者: M. Zhu
关键词: LiCoO2 ;  capacity fading ;  pulsed-laser deposition
刊名: MATERIALS CHEMISTRY AND PHYSICS
发表日期: 2008-02-15
DOI: 10.1016/j.matchemphys.2007.07.007
卷: 107, 期:2-3, 页:254-260
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1504
产权排名: 3;3
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Materials Science, Multidisciplinary
研究领域[WOS]: Materials Science
英文摘要: Well-crystallized HT-LiCoO2 films with preferential c-axis orientation were prepared by pulsed-laser deposition using stoichiometric LiCoO2 targets. The cyclicability of the deposited HT-LiCoO2 films was evaluated using constant current (CC) and pulse discharge (PD) cycling. X-ray diffraction, Raman spectroscopy and scanning electron microscopy were performed to characterize the changes in the structure and morphology of the HT-LiCoO2 films before and after cycling. The films delivered an initial discharge capacity of 40 mu Ah mu m(-1) cm(-2) and the discharge capacity decreased to 22.4 after 100 constant current cycles, due to the following three effects which occurred simultaneously: (a) mechanical failure, (b) dissolution of cation ions and (c) transformation of HT-LiCoO2 to spinel phase (Co3O4 or LiCo2O4). Under PD cycling, the discharge capacity of the films decreased quickly from about 39 to 9 mu Ah mu m(-1) cm(-2) after only five cycles. The faster capacity fading in PD cycling may be induced by significant increase in inhomogeneous lithium intercalation, while the underlying mechanisms under PD cycling may be the same with those under CC cycling. (C) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: RECHARGEABLE LITHIUM BATTERIES ;  LICOO2 THIN-FILMS ;  ELECTROCHEMICAL PROPERTIES ;  CATHODE MATERIALS ;  AGING MECHANISMS ;  ION BATTERIES ;  ELECTROLYTE ;  OXIDATION ;  CARBONATE ;  LIXCOO2
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000252580400014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100379
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Peoples R China
2.S China Univ Technol, Sch Mech Engn, Guangzhou 510640, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Themochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, Y.,Chung, C. Y.,Sun, L. X.,et al. Capacity fading of pulsed-laser deposited HT-LiCoO2 films cycled in LiClO4/PC[J]. MATERIALS CHEMISTRY AND PHYSICS,2008,107(2-3):254-260.
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