多硫化物
材料科学
阴极
复合数
纳米纤维
化学工程
硫黄
石墨烯
多孔性
电池(电)
基质(水族馆)
锂(药物)
复合材料
纳米技术
电极
电解质
化学
医学
物理化学
内分泌学
工程类
冶金
功率(物理)
物理
海洋学
量子力学
地质学
作者
Cong Li,Yan Yuan,Zhengqian Li,Yaxin Kong,Hai Lu
标识
DOI:10.1002/ente.202401556
摘要
Aimed at the application drawbacks of lithium‐polysulfide semiflow battery involved with low utilization of active material and inevitable shuttle effect, a self‐supporting porous substrate characterized by high porosity and outstanding conductivity is developed in this study, which consists of cotton‐derived nanofiber and graphene wrapped on the nanofiber. Then a gelable polymer poly‐(vinylidenefluoride‐hexafluoropropylene) is further integrated into the porous substrate for fabricating novel PS gel cathode. The as‐prepared composite matrix possesses strong PS adsorption/loading ability by gelation as well as favorable electron/ion transport pathway, which not only provides effective restriction toward PS migration and shuttle, but also actualizes rapid redox conversion of the localized active species. Consequently, the resultant PS gel cathode demonstrates high reversible capacity, and excellent cycle and rate capability even at a high sulfur loading up to 9.0 mg cm −2 .
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