生物质化学工程2025，Vol.59Issue(6)：37-46,10.DOI:10.3969/j.issn.1673-5854.2025.06.005
纤维素/聚乙烯醇离子凝胶构建及柔性超级电容器应用
Construction of Cellulose/Polyvinyl Alcohol Ionic Gels and Application of Flexible Supercapacitors
摘要
Abstract
Taking natural cellulose,polyvinyl alcohol(PVA),and ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate([Emim]BF4)as raw materials to prepare a flexible energy storage material with environmental friendliness and superior electrochemical performance successfully by solvent replacement regeneration technology.The cellulose/polyvinyl alcohol composite ionic gel electrolyte(Cel/PVA-BF4 gel)exhibited a three-dimensional porous network structure observed by scanning electron microscopy(SEM).Fourier transform infrared spectroscopy(FT-IR)confirmed the reconstruction of intermolecular hydrogen bonds,while X-ray diffraction(XRD)patterns indicated a significantly decrease in crystallinity.Thermogravimetric(TG)analysis verified that the material remained stable in a wide temperature range from-18 ℃ to 120 ℃.The introduction of[Emim]BF4 enabled the Cel/PVA-BF4 gel electrolyte achieved an ionic conductivity of 18.2 mS/cm.Using the Cel/PVA-BF4 gel material to construct an integrated flexible supercapacitor successfully.The capacitor exhibited three breakthrough advantages:a high voltage window of 3.5 V surpassed the limitations of traditional aqueous systems,an energy density of 24 Wh/kg reached the level of commercial lithium thin-film batteries,demonstrating remarkable cycling stability,after 5 000 charge-discharge cycles,it still maintained more than 94％capacity,which was better than most reported values in the literature.关键词
纤维素/聚乙烯醇/离子凝胶/高电压窗口/一体式柔性超级电容器Key words
cellulose/polyvinyl alcohol/ionic gel/high-voltage window/integrated flexible supercapacitor分类
化学化工引用本文复制引用
王文娟,姜海波,赵大伟..纤维素/聚乙烯醇离子凝胶构建及柔性超级电容器应用[J].生物质化学工程,2025,59(6):37-46,10.基金项目
辽宁省自然科学联合基金资助项目(2023-MSLH-269) （2023-MSLH-269）
