In-situ formed Li2CO3-free garnet/Li interface by rapid acid treatment for dendrite-free solid-state batteries

doi:10.1016/j.nanoen.2019.04.058

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	In-situ formed Li2CO3-free garnet/Li interface by rapid acid treatment for dendrite-free solid-state batteries
	Huo, Hanyu; Chen, Yue; Zhao, Ning; Lin, Xiaoting; Luo, Jing; Yang, Xiaofei; Liu, Yulong; Guo, Xiangxin; Sun, Xueliang
	2019-07-01
Source Publication	NANO ENERGY
ISSN	2211-2855
Volume	61 Pages:119
Subtype	Article
Abstract	Garnet-type solid-state electrolytes (SSEs) are very promising due to their high ionic conductivities at room temperature and high stability against Li metal. However, the poor garnet/Li interfacial contact caused by Li2CO3 surface contaminant can lead to lithium dendrite growth and the performance decay of solid-state batteries (SSBs), which still hinders their practical application. Herein, a universal and simple method of rapid acid treatment is proposed to perfectly remove the surface Li2CO3 and retrieve a lithiophilic SSE surface. The SSE/Li interfacial resistance dramatically decreases from 940 Omega cm(2) to 26 Omega cm(2) at 30 degrees C. The acid treated garnet-SSE pellets exhibit an interfacial resistance comparable to the pellets with various surface coatings. In addition, the intrinsic garnet/Li interface remains stable during cycling, which enables the Li symmetric cells continuously cycle over 700 h under 0.2 mA cm(-2) at 30 degrees C. And the LiFePO4/Li and LiCoO2/Li cells with acid treated garnet-SSE show excellent cycle and rate performances after eliminating the surface contaminant. These results indicate that rapid acid treatment not only guides a new understanding for an intrinsic garnet/Li interface but also is a simple and high-efficiency strategy to well address the interfacial issue for SSBs.
Keyword	Rapid acid treatment Garnets Intrinsic interfaces Solid-state batteries
DOI	10.1016/j.nanoen.2019.04.058
Language	英语
WOS Research Area	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
Publisher	ELSEVIER SCIENCE BV
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27011
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Huo, Hanyu,Chen, Yue,Zhao, Ning,et al. In-situ formed Li2CO3-free garnet/Li interface by rapid acid treatment for dendrite-free solid-state batteries[J]. NANO ENERGY,2019,61:119.
APA	Huo, Hanyu.,Chen, Yue.,Zhao, Ning.,Lin, Xiaoting.,Luo, Jing.,...&Sun, Xueliang.(2019).In-situ formed Li2CO3-free garnet/Li interface by rapid acid treatment for dendrite-free solid-state batteries.NANO ENERGY,61,119.
MLA	Huo, Hanyu,et al."In-situ formed Li2CO3-free garnet/Li interface by rapid acid treatment for dendrite-free solid-state batteries".NANO ENERGY 61(2019):119.

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