不同锂源对LiNi_(0.5)Mn_(1.5)O_4微观结构及电化学性能的影响被引量：1

Comparative Study of Cathode Material LiNi_(0.5)Mn_(1.5)O_4 Derived from Different Li Source:Microstructure and Electrochemical Performance

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摘要利用共沉淀法制备了前驱体Ni_(0.25)Mn_(0.75)(OH)_2,分别以LiOH和Li_2CO_3为锂源制备了LiNi_(0.5)Mn_(1.5)O_4(LNMO),比较了2种锂源制备的LNMO的理化性质、晶体结构及电化学性能。结果表明:以2种锂源制备的LNMO具有不同的晶体结构,分别属于不同的空间群;以Li_2CO_3制备的LNMO具有更小的比表面积、更大的一次晶粒及更大的晶胞参数;二者初次放电比容量及循环性能接近,但是以Li_2CO_3制备的LNMO具有更加优异的倍率性能。 Cathode materials LiNi0.5Mn1.5O4 were prepared with two different lithium sources using Ni0.25Mn0.75（OH）2a as a precursor synthesized by a co–precipitation method. The physicochemical characteristics, structures and electrochemical performances for these LiNi0.5Mn1.5O4 （LNMO） materials were investigated. The experimental results indicate that the crystal structures of LNMO belong to different space groups for the use of different lithium sources. Compared to the use of LiOH, LNMO synthesized with Li2CO3 presents a a small specific surface area, a great grain size and large unit cell parameters. Although the similar initial discharging capacity and cycling performance for the LNMO samples, the high rate performance of LNMO with Li2CO3 is superior to that with LiOH.

作者田光磊陈达陈海潮佘圣贤刘永峰

机构地区浙江大学材料科学与工程学院宁波金和锂电材料有限公司中国计量学院材料科学与工程学院

出处《硅酸盐学报》 EI CAS CSCD 北大核心 2016年第10期1409-1414,共6页 Journal of The Chinese Ceramic Society

基金浙江省博士后基金项目(BSH1402012) 浙江省教育厅基金项目(Y200805895)

关键词 LINI0.5MN1.5O4 结构倍率性能氧空位 lithium nickel manganese oxide microstructure rate performance oxygen vacancies

分类号 TB34 [一般工业技术—材料科学与工程]

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