One-step solid-state synthesis of nanosized LiMn2O4 cathode material with power properties

doi:10.1007/s11581-017-2060-7

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	One-step solid-state synthesis of nanosized LiMn2O4 cathode material with power properties
	Li, Shiyou; Lei, Dan; Xue, Yuzhou; Geng, Shan; Cui, Xiaoling
刊名	IONICS
	2017-08
卷号	23 期号:8 页码:1979-1984
关键词	Nanosized spinel LiMn2O4 One-step solid state reaction High-rate performance Lithium-ion batteries
ISSN号	0947-7047
DOI	10.1007/s11581-017-2060-7
英文摘要	A simple one-step solid state reaction way of preparing nanosized LiMn2O4 powders with high-rate properties is investigated. Oxalic acid is used as a functional material to lose volatile gases during the process of calcining in order to control the morphology and change the particle size of materials. The results of X-ray diffraction and scanning electron microscopy show that particle size of materials decreases with the increase of the oxalic acid content. The electrochemical test results indicate that optimal LiMn2O4 particles (S-0.5) is synthesized when the molar ratios of oxalic acid and total Mn source are 0.5:1. It also manifests that LiMn2O4 sample with middle size has the optimal electrochemical performance among five samples instead of the smallest LiMn2O4 sample. The obtained sample S-0.5 with middle size exhibits a high initial discharge capacity of 125.8 mAh g(-1) at 0.2C and 91.4% capacity retention over 100 cycles at 0.5C, superior to any one of other samples. In addition, when cycling at the high rate of 10C, the optimal S-0.5 in this work could still reach a discharge capacity of 80.8 mAh g(-1). This observation can be addressed to the fact that the middle size particles balance the contradictory of diffusion length in solid phase and particle agglomeration, which leads to perfect contacts with the conductive additive, considerable apparent Li-ion diffusion rate, and the optimal performance of S-0.5.
资助项目	Natural Science Foundation of China[21406100][51502124] ; Foundation for Innovation Groups of Basic Research in Gansu Province[1606RJIA322]
WOS研究方向	Chemistry ; Electrochemistry ; Physics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000406286800005
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33161]
专题	石油化工学院
通讯作者	Li, Shiyou
作者单位	Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Shiyou,Lei, Dan,Xue, Yuzhou,et al. One-step solid-state synthesis of nanosized LiMn2O4 cathode material with power properties[J]. IONICS,2017,23(8):1979-1984.
APA	Li, Shiyou,Lei, Dan,Xue, Yuzhou,Geng, Shan,&Cui, Xiaoling.(2017).One-step solid-state synthesis of nanosized LiMn2O4 cathode material with power properties.IONICS,23(8),1979-1984.
MLA	Li, Shiyou,et al."One-step solid-state synthesis of nanosized LiMn2O4 cathode material with power properties".IONICS 23.8(2017):1979-1984.