硅功能化反硫化聚合物用于锂硫电池阴极材料  

Silicon-functionalized inverse vulcanization polymers for lithium-sulfur battery cathode materials

作　　者：荀兴伟 权正军[1] XUN Xing-wei;QUAN Zheng-jun(College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China)

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2024年第6期63-68,96,I0003,共8页Journal of Northwest Normal University(Natural Science)

基　　金：甘肃省高校产业支持计划项目(2024CYZC-08)。

摘　　要：硫作为石油和天然气工业的副产品,全球年产量超过8000万t,且自然储量丰富,如何提高硫资源的转化利用具有重要的理论意义和应用价值.反硫化反应是一种利用硫和烯烃为交联剂合成新型富硫聚合物的新方法,所得含硫聚合物材料在环境修复和可持续能源方面展现出巨大的应用潜力.为了提高硫阴极的电子传输效率,文中利用硫与含硅烯烃类交联剂的反硫化反应成功合成了有机硅功能化的多硫聚合物,通过FTIR,NMR,XRD,XPS,TGA,MCC,DSC,SEM以及AC-TEM对聚合物结构和性能进行了表征和测试.这种聚合物不仅展现出优异的阻燃性,还可用作锂硫电池的阴极材料,并表现出良好的电化学活性、稳定的比放电容量(906 m Ah·g^(-1))和循环稳定性.这为进一步探索硅烷交联剂在多硫化物材料中的应用奠定了一定的基础.As a byproduct of the oil and natural gas industry,sulfur has an annual global production of over 80 million tons and abundant natural reserves.Improving the conversion and utilization of sulfur resources has significant theoretical significance and practical value.Inverse vulcanization(IV)polymerization reaction of sulfur and olefins is a new method to prepare novel sulfur-rich polymers through.The resulting sulfur-containing polymer materials show great potential for application in environmental remediation and sustainable energy.To enhance the electron transport efficiency of sulfur cathodes,the paper reports the successful synthesis of organosilicon functionalized sulfur polymers through the IV reaction of sulfur with Si-containing olefin.The structure and properties of the polymers were characterized and tested using FT-IR,NMR,XRD,XPS,TGA,MCC,DSC,SEM,and AC-TEM.This polymer not only exhibits excellent flame retardancy,also but can be used as a cathode material for lithium-sulfur batteries,showing good electrochemical activity with a stable specific discharge capacity(906 mAh·g^(-1))and cycling stability.This lays the foundation for further exploration of the application of silane cross-linking agents in polysulfide materials.

关 键 词：元素硫 硅烷 反硫化 有机多硫化物 锂硫电池 

分 类 号：O646[理学—物理化学] TM912[理学—化学]