【作者】 刘凤泉； 王璐； 周建军； 李林；

【Author】 Fengquan Liu;Lu Wang;Jianjun Zhou;Lin Li;Department of Chemistry,Beijing Normal University,Xinjiekou outside street of Haidian district of Beijing;

【机构】 北京师范大学化学学院；

【摘要】 锂硫电池是锂离子二次电池中最具有潜在应用价值的能源电池^[1],但是其也存在着一些缺点限制了锂硫电池的应用^[2],最为关注的就是"飞梭效应"以及电池的安全性^[3-5],凝胶电解液和固态电解质一直也备受研究者的关注^[6]。本文以阴离子引发剂,引发聚乙烯醇（PVA）衍生物在传统锂硫电池电解液中发生交联反应,得到一种黑色凝胶,该凝胶表现出较好的导电性能,以凝胶作为电解液的电池表现出很好的循环性能和倍率充放电,500次充放电循环后,剩余容量仍能保持在464mAhg^-1,在1.0C的放电倍率下,仍能保留较高的容量,其电化学性能均远远高于传统液态电解液的锂硫电池,该凝胶有效地减缓了多硫化物在电解液中的扩散,进一步减轻了"飞梭效应"。更多还原

【Abstract】 Lithium-sulfur battery is the most potential application value of energy battery,but it also exist some disadvantages to limit the application of lithium-sulfur battery.The most attention issues are the "shuttle effect" and the safety of the battery.Gel electrolyte and solid electrolyte has also is the researchers’ attention.In this paper,anionic initiator triggering polyvinyl alcohol（PVA） derivatives to occur crosslinking reaction and get a black gel.The gel showed good conductive properties and a good cycle performance and rate performance.The residual capacity remained in 464 mAhg^-1 after 500 cycles and can still keep high capacity at the rate of 1.0 C.Its electrochemical properties are far higher than that of traditional liquid electrolyte of lithium battery,Gel electrolyte slow the spread of polysulfide in the electrolyte effectively and further reduce the "shuttle effect".更多还原