标题:Mn-Ni Content-Dependent Structures and Electrochemical Behaviors of Serial Li_(1.2)Ni_(0.13+x)Co_(0.13)Mn_(0.54-x)O2 as Lithium-Ion Battery Cathodes
作者:Chenhao Zhao;Xinxin Wang;Xinru Liu
作者机构:[Zhao, C] Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, 更多
通讯作者:Shen, Q
通讯作者地址:[Shen, Q]Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem Educ Minist, Jinan 250100, Peoples R China.
来源:ACS applied materials & interfaces
出版年:2014
卷:6
期:4
页码:2386-2392
DOI:10.1021/am404690z
关键词:cathode materials;solid solution;crystal structure;electrochemical behaviors;lithium-ion batteries
摘要:In this paper, a citric acid-assisted sol—gel route has been successfully used for the nanofabrication of serial solid solutions in a chemical formula of Li_(1.2)Ni_(0.13+x)Co_(0.13)Mn_(0.54-x)O2 at the x value of —0.06, —0.03, 0, 0.03, or 0.06. Powdered X-ray diffraction (XRD) results indicate that all the solid solutions possess the well-established structural characteristics for a homogeneous solid solution of Li2MnO3 and LiNi_(1/3+x)Co_(1/3)Mn_(1/3-x)O2 components with an increasing Li2MnO3 content along with the decrease of x value. Scanning electron microscope (SEM) observation and elemental analyses show that these samples are composed of polyhedral nanoparticles with a chemical composition similar to that of the corresponding raw materials. Applied as lithium-ion battery cathodes, the initial Coulombic efficiency, cycling stability, and rate capability of solid solutions are determined by their chemical compositions, giving an optimal x value within the range of —0.03 and 0.03. That is, the variation of x value in the formula Li_(1.2)Ni_(0.13+x)Co_(0.13)Mn_(0.54-x)O2 should exert a great influence on the electrochemical performances of these cathodes. Anyways, these suggest an effective strategy to understand the relationship between the Mn—Ni content-dependent crystal structures and electrochemical behaviors of solid solutions.
收录类别:EI;SCOPUS;SCIE
WOS核心被引频次:29
Scopus被引频次:30
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896890461&doi=10.1021%2fam404690z&partnerID=40&md5=310246ecad5c6fbf21256277884f80c3
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