Volume 136, Issue 38 e202409435
Forschungsartikel

In Situ Analysis of Interfacial Morphological and Chemical Evolution in All-Solid-State Lithium-Metal Batteries

Dr. Xu-Sheng Zhang

Dr. Xu-Sheng Zhang

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190 People's Republic of China

University of Chinese Academy of Sciences, Beijing, 100190 People's Republic of China

Search for more papers by this author
Dr. Jing Wan

Dr. Jing Wan

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190 People's Republic of China

University of Chinese Academy of Sciences, Beijing, 100190 People's Republic of China

Search for more papers by this author
Dr. Zhen-Zhen Shen

Dr. Zhen-Zhen Shen

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190 People's Republic of China

University of Chinese Academy of Sciences, Beijing, 100190 People's Republic of China

Search for more papers by this author
Prof. Dr. Shuang-Yan Lang

Prof. Dr. Shuang-Yan Lang

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190 People's Republic of China

University of Chinese Academy of Sciences, Beijing, 100190 People's Republic of China

Search for more papers by this author
Prof. Dr. Sen Xin

Prof. Dr. Sen Xin

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190 People's Republic of China

University of Chinese Academy of Sciences, Beijing, 100190 People's Republic of China

Search for more papers by this author
Prof. Dr. Rui Wen

Corresponding Author

Prof. Dr. Rui Wen

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190 People's Republic of China

University of Chinese Academy of Sciences, Beijing, 100190 People's Republic of China

Search for more papers by this author
Prof. Dr. Yu-Guo Guo

Corresponding Author

Prof. Dr. Yu-Guo Guo

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190 People's Republic of China

University of Chinese Academy of Sciences, Beijing, 100190 People's Republic of China

Search for more papers by this author
Prof. Dr. Li-Jun Wan

Corresponding Author

Prof. Dr. Li-Jun Wan

CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190 People's Republic of China

University of Chinese Academy of Sciences, Beijing, 100190 People's Republic of China

Search for more papers by this author
First published: 30 June 2024

Abstract

In situ analysis of Li plating/stripping processes and evolution of solid electrolyte interphase (SEI) are critical for optimizing all-solid-state Li metal batteries (ASSLMB). However, the buried solid-solid interfaces present a challenge for detection which preclude the employment of multiple analysis techniques. Herein, by employing complementary in situ characterizations, morphological/chemical evolution, Li plating/stripping dynamics and SEI dynamics were directly detected. As a mixed ionic-electronic conducting interface, Li|Li10GeP2S12 (LGPS) performed distinct interfacial morphological/chemical evolution and dynamics from ionic-conducting/electronic-isolating interface like Li|Li3PS4 (LPS), which were revealed by combination of in situ atomic force microscopy and in situ X-ray photoelectron spectroscopy. Though Li plating speed in LGPS was higher than LPS, speed of SSE decomposition was similar and ~85 % interfacial SSE turned into SEI during plating and remained unchanged in stripping. To leverage strengths of different SSEs, an LPS-LGPS-LPS sandwich electrolyte was developed, demonstrating enhanced ionic conductivity and improved interfacial stability with less SSE decomposition (25 %). Using in situ Kelvin probe force microscopy, Li-ion behavior at interface between different SSEs was effectively visualized, uncovering distribution of Li ions at LGPS|LPS interface under different potentials.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.