DataVXAdvanced Functional MaterialsPaper
journal article·2024-02

Active Regulation Volume Change of Micrometer‐Size Li2S Cathode with High Materials Utilization for All‐Solid‐State Li/S Batteries through an Interfacial Redox Mediator

Peiwen Yu, Shaorui Sun, Chunhao Sun, Chaoyuan Zeng, Ze Hua, Niaz Ahmad, Ruiwen Shao, Wen Yang

Advanced Functional Materials· Volume 34· Issue 8
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Source abstract

Abstract

Abstract Low electronic and ionic transport, limited cathode active material utilization, and significant volume change have pledged the practical application of all‐solid‐state Li/S batteries (ASSLSBs). Herein, an unprecedented Li2S‐LixIn2S3 cathode is designed whereby In2S3 reacts with Li2S under high‐energy ball milling. In situ electron diffraction and ex situ XPS are implanted to probe the reaction mechanism of Li2S‐LixIn2S3 in ASSLSBs. The results indicate that LixIn2S3 serves as a mobility mediator for both charge‐carriers (Li+ and e−) and redox mediator for Li2S activation, ensuring efficient electronic and ionic transportation at the cathode interface and inhibiting ≈ 70% relative volumetric change in the cathode, as confirmed by in situ TEM. Thus, the Li2S‐LixIn2S3 cathode delivers an initial areal capacity of 3.47 mAh cm−2 at 4.0 mgLi2S cm−2 with 78% utilization of Li2S. A solid‐state cell with Li2S‐LixIn2S3 cathode carries 82.35% capacity retention over 200 cycles at 0.192 mA cm−2 and a remarkable rate capability up to 0.64 mA cm−2 at RT. Besides, Li2S‐LixIn2S3 exhibits the highest initial areal capacity of 4.08 mAh cm−2 with ≈74.01% capacity retention over 50 cycles versus 6.6 mgLi2S cm−2 at 0.192 mA cm−2 at RT. The proposed strategy of the redox mediator minimized volumetric change and realized outstanding electrochemical performance for ASSLSBs.
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Research context

Energy storageBiomaterials

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry and Chemical Engineering Beijing Institute of Technology 5# Zhongguancun Road, Haidian District Beijing 100081 P. R. China

Beijing Key Laboratory for Green Catalysis and Separation College of Environmental and Energy Engineering Beijing University of Technology Beijing 100124 P. R. China

Beijing Key Laboratory of Microstructure and Properties of Solids Faculty of Materials and Manufacturing Beijing University of Technology Beijing 100124 P. R. China

Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources Hainan Provincial Key Lab of Fine Chemistry School of Chemical Engineering and Technology Hainan University Haikou 570228 P. R. China

Analysis & Testing Center Beijing Institute of Technology Beijing 102488 P. R. China

Beijing Advanced Innovation Center for Intelligent Robots and Systems School of Medical Technology Beijing Institute of Technology Beijing 100081 P. R. China

Funding

National Natural Science Foundation of China · Gansu Postdoctoral Science Foundation · Special Fund for Scientific Innovation Strategy-Construction of High-level Academy of Agriculture Science

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