Porous LiNi05Mn15O4 sphere as 5 v cathode material for lithium ion batteries

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	Porous LiNi05Mn15O4 sphere as 5 v cathode material for lithium ion batteries
	Wang, Jing ; Lin, Weiqing ; Wu, Bihe ; Zhao, Jinb ; Zhao JB(赵金保)
刊名	http://dx.doi.org/10.1039/c4ta02903h
	2014
关键词	Agglomeration Cathodes Crystal structure Electric batteries Ions Lithium Lithium alloys Lithium compounds Manganese Manganese oxide Secondary batteries Spheres
英文摘要	A new type of microsized porous spherical LiNi0.5Mn1.5O4 (LNMO-Air) cathode material for a lithium ion secondary battery has been synthesized by an impregnation method using highly reactive nanocupule MnO2 spheres as the manganese source. These LNMO-Air spheres are aggregates of nanosized polyhedron particles with well-defined cubic spinel structure. They showed excellent rate capability and cycle stability, compared with other microspheres of LNMO. We also investigated the effect of the trace amounts of Mn3+ in the crystal structure on its specific capacity and cycle stability. Compared with the sample (LNMO-O2) calcined in an oxygen atmosphere, which is considered to be Mn3+ free, LNMO-Air exhibits superior specific capacity, cycling ability and rate capability. Because of the presence of trace amounts of Mn3+, the LNMO-Air sample presents a discharge specific capacity of 108 mA h g-1 at 5 C rate at 55 °C after 80 cycles without significant reduction. These improvements can be explained by better ion conductivity as the metal oxide layer spacing is enlarged to facilitate faster ion transfer and significantly improved electrical conductivity; both are attributed to the presence of Mn3+. This journal is ? the Partner Organisations 2014.
语种	英语
出版者	Royal Society of Chemistry
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89746]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Wang, Jing,Lin, Weiqing,Wu, Bihe,et al. Porous LiNi05Mn15O4 sphere as 5 v cathode material for lithium ion batteries[J]. http://dx.doi.org/10.1039/c4ta02903h,2014.
APA	Wang, Jing,Lin, Weiqing,Wu, Bihe,Zhao, Jinb,&赵金保.(2014).Porous LiNi05Mn15O4 sphere as 5 v cathode material for lithium ion batteries.http://dx.doi.org/10.1039/c4ta02903h.
MLA	Wang, Jing,et al."Porous LiNi05Mn15O4 sphere as 5 v cathode material for lithium ion batteries".http://dx.doi.org/10.1039/c4ta02903h (2014).