An artificial hybrid interphase for an ultrahigh-rate and practical lithium metal anode

Anjun Hu; Wei Chen; Xinchuan Du; Yin Hu; Tianyu Lei; Hongbo Wang; Lanxin Xue; Yaoyao Li; He Sun; Yichao Yan; Jianping Long; Chaozhu Shu; Jun Zhu; Baihai Li; Xianfu Wang; Jie Xiong

doi:10.1039/D1EE00508A

An artificial hybrid interphase for an ultrahigh-rate and practical lithium metal anode†

Anjun Hu,

‡^a Wei Chen,‡^a Xinchuan Du,‡^a Yin Hu,^ab Tianyu Lei,^a Hongbo Wang,^a Lanxin Xue,^a Yaoyao Li,^a He Sun,^a Yichao Yan,^a Jianping Long,^c Chaozhu Shu,

^c Jun Zhu,^a Baihai Li,

*^b Xianfu Wang

*^a and Jie Xiong

*^a

Author affiliations

* Corresponding authors

^a State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China
E-mail: xfwang87@uestc.edu.cn, jiexiong@uestc.edu.cn

^b School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
E-mail: libaihai@uestc.edu.cn

^c College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China

Abstract

The solid electrolyte interphase (SEI) layer is pivotal for stable lithium (Li) metal batteries especially under a high rate. However, the mechanism of Li⁺ transport through the SEI has not been clearly elucidated to build robust Li anodes for practical Li metal batteries. Herein, an artificial hybrid SEI layer consisting of lithium-antimony (Li₃Sb) alloy and lithium fluoride (LiF) is constructed to explore the ion diffusion behaviors within the SEI. As evidenced theoretically and experimentally, Li₃Sb is identified as a superionic conductor for Li⁺ transport and as an interfacial stabilizer for the SEI layer while the LiF component with superior electron-blocking capability reduces the electron tunneling from the Li anode into the SEI, resulting in uniform dendrite-free Li deposition at the SEI/Li interface and stable Li plating/stripping behaviors at an ultrahigh rate of 20 mA cm⁻². A practical 325.28 W h kg⁻¹ pouch cell is well demonstrated under a high sulfur loading of 6 mg cm⁻² and a low electrolyte/sulfur ratio of 3 μl mg⁻¹. This work uncovers the internal mechanism of Li⁺ transport within the SEI component, and provides an avenue to stabilize the Li anode under practical high-rate conditions.

Energy & Environmental Science

An artificial hybrid interphase for an ultrahigh-rate and practical lithium metal anode†

Abstract

Supplementary files

Article information

Download Citation

Permissions

An artificial hybrid interphase for an ultrahigh-rate and practical lithium metal anode

Social activity

Search articles by author

Spotlight

Advertisements