Li[Li02Mn054Ni013Co013] O2-LiMn15Ti05O4 composite cathodes with improved electrochemical performance for lithium ion batteries

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	Li[Li02Mn054Ni013Co013] O2-LiMn15Ti05O4 composite cathodes with improved electrochemical performance for lithium ion batteries
	Wang, Sihui ; Wu, Yan ; Li, Yixiao ; Zheng, Jianming ; Yang, Jihui ; Yang, Yo ; Yang Y(杨勇)
刊名	http://dx.doi.org/10.1016/j.electacta.2014.04.008
	2014
关键词	Cathodes Lithium alloys Lithium batteries Lithium compounds Manganese Manganese oxide Nickel
英文摘要	Layered Li[Li0.2Mn0.54Ni0.13Co 0.13]O2-Spinel LiMn1.5Ti0.5O 4 composite cathodes have been prepared by mechanically mixing process and investigated in this work. The unoccupied 16c sites of spinel LiMn1.5Ti0.5O4 can be used as a reservoir to store the Li+ ions that are lost during the activation of Li 2MnO3 component in lithium-rich Li[Li0.2Mn 0.54Ni0.13Co0.13]O2 material. As a consequence, the initial irreversible capacity loss (ICL) of lithium-rich Li[Li0.2Mn0.54Ni0.13Co0.13]O 2 is significantly reduced in the presence of spinel LiMn 1.5Ti0.5O4. When mixed with 35.7 wt% of LiMn1.5Ti0.5O4, the lithium-rich material shows an initial ICL of only 17 mAh g-1, and could still deliver an initial discharge capacity as high as 220 mAh g-1. More importantly, the composite materials show better cycling performance and rate capability as compared with the pristine Li[Li0.2Mn0.54Ni 0.13Co0.13]O2. The material with 35.7 wt% LiMn1.5Ti0.5O4 shows the best cycling stability, retaining 90% of the initial discharge capacity at the current density of 20 mA g-1 after 40 cycles. The improved cycling stability and rate performance can be ascribed to the good conductivity of spinel LiMn1.5Ti0.5O4 with 3D fast Li+ diffusion path, which ensures the timely lithium ion intercalation and de-intercalation. ? 2014 Elsevier Ltd.
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89813]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Wang, Sihui,Wu, Yan,Li, Yixiao,et al. Li[Li02Mn054Ni013Co013] O2-LiMn15Ti05O4 composite cathodes with improved electrochemical performance for lithium ion batteries[J]. http://dx.doi.org/10.1016/j.electacta.2014.04.008,2014.
APA	Wang, Sihui.,Wu, Yan.,Li, Yixiao.,Zheng, Jianming.,Yang, Jihui.,...&杨勇.(2014).Li[Li02Mn054Ni013Co013] O2-LiMn15Ti05O4 composite cathodes with improved electrochemical performance for lithium ion batteries.http://dx.doi.org/10.1016/j.electacta.2014.04.008.
MLA	Wang, Sihui,et al."Li[Li02Mn054Ni013Co013] O2-LiMn15Ti05O4 composite cathodes with improved electrochemical performance for lithium ion batteries".http://dx.doi.org/10.1016/j.electacta.2014.04.008 (2014).