Related Experiment Video
Updated: Jul 15, 2026
07:55
Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
Published on: April 17, 2018
Real-Time Monitoring of Multiphase Evolution in All-Solid-State Li-S Batteries via In-Situ Synchrotron X-ray
Yitao Lin1, Zichang Lin1, Honghe Ding2
1Department of Physics, Tsinghua University, Beijing 100084, China.
ACS Applied Materials & Interfaces
|July 13, 2026
Summary
All-solid-state lithium-sulfur batteries (ASSLSBs) show promise for energy storage. This study reveals their two-step discharge mechanism and how additives improve performance using advanced spectroscopy.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- All-solid-state lithium-sulfur batteries (ASSLSBs) offer high energy density but suffer from unclear reaction mechanisms.
- The complex multiphase evolution in ASSLSBs hinders analysis with current operando methods.
Purpose of the Study:
- To elucidate the real-time sulfur redox mechanisms in ASSLSBs under practical conditions.
- To develop a robust method for analyzing complex multiphase evolution during electrochemical processes.
Main Methods:
- Designed an in-situ cell for real-time sulfur K-edge X-ray absorption spectroscopy.
- Developed a hybrid method combining principal component analysis and constrained optimization for spectral deconvolution.
Main Results:
- Revealed a two-step discharge pathway: sulfur reduces to Li$_{2}$S$_{2}$ and then to Li$_{2}$S.
- Demonstrated that a P$_{2}$S$_{5}$ additive reacts in-situ to form Li$_{3}$PS$_{4}$, enhancing ionic conduction and discharge completeness.
Conclusions:
- Established a general framework for real-time analysis of multiphase electrochemical evolution.
- Elucidated the sulfur redox mechanisms in ASSLSBs, identifying key intermediates and the role of additives.
