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dc.contributor.authorLiu, Hansan
dc.contributor.authorYang, Yong
dc.contributor.author杨勇
dc.contributor.authorZhang, Jiujun
dc.date.accessioned2011-06-28T23:59:03Z
dc.date.available2011-06-28T23:59:03Z
dc.date.issued2006-08
dc.identifier.citationJOURNAL OF POWER SOURCES,2006,162(1):644-650zh_CN
dc.identifier.issn0378-7753
dc.identifier.urihttp://dx.doi.org/doi:10.1016/j.jpowsour.2006.07.028
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/9853
dc.description.abstractLiNi0.8Co0.2O2 cathode material showed a performance loss after storage in air. The surface species on the material formed during the exposure to air were identified through TG, SEM, TPD-MS, XRD and XPS. Two thin layers were found on the surface. The first layer in contact with the bulk material contains NiO-like species, and the top layer consists of adsorbed hydroxyl, bicarbonate, carbonate, and crystalline Li2CO3. These two layers are both electrochemically inactive and poor conductors for Li+ ions, which are believed to be responsible for the storage loss. A chemical reaction mechanism, involving atmospheric H2O and CO2, and the particle surface of LiNi0.8Co0.2O2 material, was proposed to explain the formation process of those surface species. For storage loss prevention, a doping approach to reduce nickel content and a storage approach to isolate the material from H2O and CO2 were found to be effective to improve the storage property of LiNiO2-based materials. For storage loss recovery, a heat-treatment process at 725 C-o was demonstrated to be a feasible approach for full recovery of the performance. Crown Copyright (C) 2006 Published by Elsevier B.V. All rights reserved.zh_CN
dc.language.isoenzh_CN
dc.publisherELSEVIER SCIENCE BVzh_CN
dc.subjectLiNi0.8Co0.2O2zh_CN
dc.subjectstorage propertyzh_CN
dc.subjectcathode materialzh_CN
dc.subjectlithium-ion batteryzh_CN
dc.subjectsurface analysiszh_CN
dc.titleInvestigation and improvement on the storage property of LiNi0.8Co0.2O2 as a cathode material for lithium-ion batterieszh_CN
dc.typeArticlezh_CN


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