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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
2019-04-30
Source PublicationJOURNAL OF POWER SOURCES
ISSN0378-7753
Volume420Pages:15
SubtypeArticle
AbstractGarnets 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.
KeywordGarnets SnO2 intermediate layers Interface resistance Conversion reaction Cycle stability
DOI10.1016/j.jpowsour.2019.02.085
Language英语
WOS Research AreaChemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27163
Collection中国科学院上海硅酸盐研究所
Recommended Citation
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.
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