Nanocomposite intermediate layers formed by conversion reaction of SnO2 for Li/garnet/Li cycle stability

doi:10.1016/j.jpowsour.2019.02.085

	Nanocomposite intermediate layers formed by conversion reaction of SnO2 for Li/garnet/Li cycle stability
	Chen, Yue; He, Minghui; Zhao, Ning; Fu, Jingming; Huo, Hanyu; zhang, Tao; Li, Yiqi; Xu, Fangfang; Guo, Xiangxin
刊名	JOURNAL OF POWER SOURCES
	2019-04-30
卷号	420 页码:15
关键词	Garnets SnO2 intermediate layers Interface resistance Conversion reaction Cycle stability
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2019.02.085
文献子类	Article
英文摘要	Garnets are promising solid electrolytes for developing solid state Li batteries, owing to their features of relatively high conductivity and stability against lithium metal. However, they show shortcoming of Li penetration through garnets during Li plating and stripping, which limits their practice application. Herein, we present a strategy to solve such problem by coating SnO2 films on the surfaces of the Li6.4La3Zr1.4Ta0.6O12 pellets. Through conversion reaction of SnO2 with Li at 200 degrees C, the nanocomposite layers consisting of crosslinked LixSn and Li2O are formed between the Li and the Li6.4La3Zr1.4Ta0.6O12 electrolytes. This leads to transition from lithiophobicity to lithiophilicity, thus greatly reducing interfacial resistance from 1100 Omega cm(2) to 25 Omega cm(2). Furthermore, taking advantage of suppressing volume change of LixSn alloy which is about 260%, the intermediate layers maintain integrity under the current densities of 0.2 mA cm(-2) for 650 h cycles. In addition, the critical current density of Li/SnO2-Li6.4La.Zr1.4Ta0.6O12-SnO2/Li can be as high as 1.15 mA cm(-2). As a proof-of-concept, this effective interface modification based on conversion reaction method contributes to a useful way of solving the Li/garnet interface problem and promoting the solid state Li batteries development.
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ELSEVIER SCIENCE BV
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27163]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Chen, Yue,He, Minghui,Zhao, Ning,et al. Nanocomposite intermediate layers formed by conversion reaction of SnO2 for Li/garnet/Li cycle stability[J]. JOURNAL OF POWER SOURCES,2019,420:15.
APA	Chen, Yue.,He, Minghui.,Zhao, Ning.,Fu, Jingming.,Huo, Hanyu.,...&Guo, Xiangxin.(2019).Nanocomposite intermediate layers formed by conversion reaction of SnO2 for Li/garnet/Li cycle stability.JOURNAL OF POWER SOURCES,420,15.
MLA	Chen, Yue,et al."Nanocomposite intermediate layers formed by conversion reaction of SnO2 for Li/garnet/Li cycle stability".JOURNAL OF POWER SOURCES 420(2019):15.