Microwave synthesis of LiMn2O4 cathode material

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	Microwave synthesis of LiMn2O4 cathode material
	Yan, HW ; Huang, XJ ; Chen, LQ
刊名	JOURNAL OF POWER SOURCES
	1999
卷号	81 页码:647
ISSN号	0378-7753
通讯作者	Chen, LQ: Chinese Acad Sci, Inst Phys, Lab Solid State Ion, POB 603, Beijing 100080, Peoples R China.
中文摘要	Fine powders of tin oxide doped with traces of silicon in combination with highly dispersed amorphous silicon oxide have been synthesized by an advanced ultrasonic spray method. The mixtures have been analyzed by XRD and IR. The electrochemical results showed that addition of silicon decreases the tin oxidation state, and, hence, reduces the irreversible capacity during the first discharge/charge cycle. SiO2 and Li2SiO3 appeared during the first discharging as confirmed by IR spectroscopy. Furthermore, a reversible capacity of 900 mA h/g to 950 mA h/'g for these composites has been found, which is even higher than the theoretical value (783 mA h/g according to the Li4.4Sn). The chemical diffusion coefficients of lithium in the Li-Sn alloy phases formed (Li0.4Sn, LiSn, Li3Sn7, Li3.5Sn and Li4.4Sn) have been measured by galvanostatic intermittent titration technique (GITT). Below a Li content corresponding to Li3Sn7, a reduced voltage polarization as well as an increased lithium chemical diffusion coefficient were observed. This improved performance is due to an enhanced interfacial diffusion, caused by highly dispersed inert second phases, i.e., SiO2 and LiSi2O3. (C) 1999 Elsevier Science S.A. All rights reserved.
收录类别	SCI
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/42162]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Yan, HW,Huang, XJ,Chen, LQ. Microwave synthesis of LiMn2O4 cathode material[J]. JOURNAL OF POWER SOURCES,1999,81:647.
APA	Yan, HW,Huang, XJ,&Chen, LQ.(1999).Microwave synthesis of LiMn2O4 cathode material.JOURNAL OF POWER SOURCES,81,647.
MLA	Yan, HW,et al."Microwave synthesis of LiMn2O4 cathode material".JOURNAL OF POWER SOURCES 81(1999):647.