{"title":"A universal strategy for the refined frameworks and improved performance of distinct commercial polyacrylonitriles in sulfur cathodes","authors":"Yikun Yi, Feng Hai, Wenting Chen, Xin Gao, Jingyu Guo, Weicheng Xue, Mingtao Li","doi":"10.1007/s40843-024-2988-6","DOIUrl":null,"url":null,"abstract":"<p>Sulfurized polyacrylonitrile (SPAN) with the exceptional stability, safety, low cost, and high capacity have been positioned as a highly promising cathode material for next-generation lithium-ion batteries. However, in the market, polyacrylonitrile (PAN) sourced from different suppliers and available at varying prices exhibits significant variations in physical and chemical properties, resulting in diverse behaviors in Li-SPAN batteries. By studying the mechanism, we found that the PAN copolymerization structure leads to the stacking of chain segments which obstructs the embedding of sulfur and lithium ions. Here, we propose a universal strategy for the refined frameworks by an exogenous additive to modify various PAN raw materials, and the battery capacity and cycling performance are obviously improved. As a result, the copolymerized SPAN with a poor original capacity is nearly doubled to over 500 mAh g<sup>−1</sup>, almost comparable to high-quality yet expensively imported products; for the sample with a high initial capacity but fading in ether-based electrolytes, it can be modified to maintain stability over 400 cycles. This strategy offers an alternative approach for SPAN modification that is characterized by its simplicity and low cost, thereby facilitating the large-scale development of Li-SPAN batteries.\n</p>","PeriodicalId":773,"journal":{"name":"Science China Materials","volume":null,"pages":null},"PeriodicalIF":6.8000,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science China Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s40843-024-2988-6","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Sulfurized polyacrylonitrile (SPAN) with the exceptional stability, safety, low cost, and high capacity have been positioned as a highly promising cathode material for next-generation lithium-ion batteries. However, in the market, polyacrylonitrile (PAN) sourced from different suppliers and available at varying prices exhibits significant variations in physical and chemical properties, resulting in diverse behaviors in Li-SPAN batteries. By studying the mechanism, we found that the PAN copolymerization structure leads to the stacking of chain segments which obstructs the embedding of sulfur and lithium ions. Here, we propose a universal strategy for the refined frameworks by an exogenous additive to modify various PAN raw materials, and the battery capacity and cycling performance are obviously improved. As a result, the copolymerized SPAN with a poor original capacity is nearly doubled to over 500 mAh g−1, almost comparable to high-quality yet expensively imported products; for the sample with a high initial capacity but fading in ether-based electrolytes, it can be modified to maintain stability over 400 cycles. This strategy offers an alternative approach for SPAN modification that is characterized by its simplicity and low cost, thereby facilitating the large-scale development of Li-SPAN batteries.
期刊介绍:
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.