Proton-Conducting Polyoxometalates as Redox Electrolytes Synergistically Boosting the Performance of Self-Healing Solid-State Supercapacitors with Polyaniline
作者机构：Key Lab of PolyoxometalateScience of Ministry of EducationKey Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin ProvinceFaculty of ChemistryNortheast Normal UniversityChangchun 130024
出 版 物：《CCS Chemistry》 (中国化学会会刊（英文）)
年 卷 期：2021年第3卷第3期
页 面：1649-1658页
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0703[理学-化学]
基 金：support from the National Natural Science Foundation of China(nos.21871042 21471028 and 21673098)
主 题：polyoxometalates solid-state supercapacitors redox electrolytes proton conductors self-healing
摘 要：Energy storage devices with high volumetric and gravimetric capacitance are in urgent demand due to the booming market of portable and wearable *** redox-active molecules as electrolytes is a strategy to improve the capacitance and energy density of solid-state supercapacitors(SCs).In this study,polyoxometalates(POMs)are applied as proton conductors and redox mediators in polyvinyl alcohol(PVA)electrolytes,which increase the capacitance of obtained SCs with polyaniline(PANI).H_(3)PMo_(12)O_(40)-loaded PANI electrodes provide pseudocapacitance with an eight-electron Faraday reaction in a charge–discharge *** has rarely been reported in SCs *** largest capacitance of SCs with H_(3)PMo_(12)O_(40)and H_(3)PW_(12)O_(40)as electrolytes is 7.69 F/cm^(2)(3840 F/g)based on a single electrode at 0.5 mA/cm^(2).In addition,POM electrolytes exhibit excellent self-healing ability,which is attributed to the rich hydrogen-bonding network between POMs and *** study demonstrates that the capacitance of solid-state SCs is improved by using molecular redox-active electrolytes and showcases the potential of applying this strategy to other energy storage devices in the future.
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