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Design of high‐performance flexible symmetric supercapacitors energized by redox‐mediated hydrogels including metal‐doped acidic polyelectrolyte
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-02-12 , DOI: 10.1002/er.5199 Emre Cevik 1 , Ayhan Bozkurt 2
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-02-12 , DOI: 10.1002/er.5199 Emre Cevik 1 , Ayhan Bozkurt 2
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The fabrication of flexible supercapacitors was achieved by employing the novel redox‐activated polymer electrolytes comprising poly(vinylphosphonic acid) (PVPA) and nickel nitrate Ni(NO3)2, Ni. The hydrogels, PVPA/NiX, were produced in various contents, in which X denotes the doping fraction of Ni in PVPA. The structure, thermal, and morphology of the materials were characterized, and then they were applied for construction of supercapacitors. The performance evaluations of the fabricated devices were carried out by electrochemical impedance spectroscopy, galvanostatic charge‐discharge, and cyclic voltammetry experiments. Flexible supercapacitor devices assembled with activated carbon (AC) electrodes and PVPA/NiX hydrogels produced 793 F g−1 specific capacitance with 30 times enhanced capacitance compared with Ni‐free system. The energy density of 103.1 Wh kg−1 was yielded from the device at a power density of 500 W kg−1. The supercapacitor demonstrated an excellent performance during 5.000 charge‐discharge cycles, while preserving 84% of its initial capacitance. The supercapacitor constructed of 1 × 5 cm dimension, successfully operates the LED after charging at 3 V.
中文翻译：
由氧化还原介导的水凝胶（包括掺杂金属的酸性聚电解质）供电的高性能柔性对称超级电容器的设计
柔性超级电容器的制造是通过使用新型的氧化还原活化的聚合物电解质实现的，该电解质包括聚（乙烯基膦酸）（PVPA）和硝酸镍Ni（NO 3）2，Ni。制备了各种含量的水凝胶PVPA / NiX，其中X表示Ni在PVPA中的掺杂分数。表征了材料的结构，热学和形貌，然后将其应用于超级电容器的构建。通过电化学阻抗谱，恒电流充放电和循环伏安法实验对制成的器件进行了性能评估。柔性超级电容器装置与活性炭（AC）电极和PVPA / NiX水凝胶组装在一起，产生793 F g -1比无镍系统具有30倍的增强电容。从该装置以500 W kg -1的功率密度产生103.1 Wh kg -1的能量密度。超级电容器在5.000次充放电循环中表现出出色的性能，同时保留了其初始电容的84％。构造为1×5 cm的超级电容器在3 V充电后可成功操作LED。
更新日期：2020-02-12
中文翻译：
由氧化还原介导的水凝胶（包括掺杂金属的酸性聚电解质）供电的高性能柔性对称超级电容器的设计
柔性超级电容器的制造是通过使用新型的氧化还原活化的聚合物电解质实现的，该电解质包括聚（乙烯基膦酸）（PVPA）和硝酸镍Ni（NO 3）2，Ni。制备了各种含量的水凝胶PVPA / NiX，其中X表示Ni在PVPA中的掺杂分数。表征了材料的结构，热学和形貌，然后将其应用于超级电容器的构建。通过电化学阻抗谱，恒电流充放电和循环伏安法实验对制成的器件进行了性能评估。柔性超级电容器装置与活性炭（AC）电极和PVPA / NiX水凝胶组装在一起，产生793 F g -1比无镍系统具有30倍的增强电容。从该装置以500 W kg -1的功率密度产生103.1 Wh kg -1的能量密度。超级电容器在5.000次充放电循环中表现出出色的性能，同时保留了其初始电容的84％。构造为1×5 cm的超级电容器在3 V充电后可成功操作LED。
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