Multiscale Understanding of Covalently Fixed Sulfur–Polyacrylonitrile Composite as Advanced Cathode for Metal–Sulfur Batteries

Advanced Science

Hun‐Gi Jung¹  Min‐Gi Jeong¹  Yang‐Kook Sun²  Mohammad Shamsuddin Ahmed³  Jaekook Kim³  Jang‐Yeon Hwang³  Suyeong Lee³  Marco Agostini⁴  Jun Ming⁵ 

[1] Center for Energy Storage Research Clean Energy Institute Korea Institute of Science and Technology Seoul 02792 Republic of Korea;Department of Energy Engineering Hanyang University Seoul 04763 Republic of Korea;Department of Materials Science and Engineering Chonnam National University Gwangju 61186 Republic of Korea;Department of Physics Chalmers University of Technology Göteborg SE41296 Sweden;State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry CAS Changchun 130022 China;

关键词: chemical structure;    metal–sulfur batteries;    sulfurized polyacrylonitrile;    universal cathodes;   

DOI  :  10.1002/advs.202101123

来源: DOAJ

【 摘 要 】

Abstract Metal–sulfur batteries (MSBs) provide high specific capacity due to the reversible redox mechanism based on conversion reaction that makes this battery a more promising candidate for next‐generation energy storage systems. Recently, along with elemental sulfur (S8), sulfurized polyacrylonitrile (SPAN), in which active sulfur moieties are covalently bounded to carbon backbone, has received significant attention as an electrode material. Importantly, SPAN can serve as a universal cathode with minimized metal–polysulfide dissolution because sulfur is immobilized through covalent bonding at the carbon backbone. Considering these unique structural features, SPAN represents a new approach beyond elemental S8 for MSBs. However, the development of SPAN electrodes is in its infancy stage compared to conventional S8 cathodes because several issues such as chemical structure, attached sulfur chain lengths, and over‐capacity in the first cycle remain unresolved. In addition, physical, chemical, or specific treatments are required for tuning intrinsic properties such as sulfur loading, porosity, and conductivity, which have a pivotal role in improving battery performance. This review discusses the fundamental and technological discussions on SPAN synthesis, physicochemical properties, and electrochemical performance in MSBs. Further, the essential guidance will provide research directions on SPAN electrodes for potential and industrial applications of MSBs.

【 授权许可】

Unknown