为制备具有轻质、小体积、高柔性的储能器件,以比表面大且质轻的碳纤维(CF)为纤维电极基体,通过化学镀-电化学氧化法实现金属@金属氢氧化物电极活性物质的原位沉积,制备复合纤维电极(NiCo@NiCoDH/CF);同时采用平纹编织技术将纤维电极以纬线方式嵌入织物,结合凝胶电解质组成柔性超级电容器(wSC-NC)。结果表明:经电氧化处理得到的NiCo@NiCoDH/CF表面呈颗粒与薄片状多级结构均匀分布,经5000次循环后,循环保持率在99%以上;采用弯曲测试对比电容器折叠1000次前后循环伏安曲线,结果显示折叠1000次后电容几乎无损失,编织型超级电容器有助于承受长期重复的变形。
In order to prepare energy storage devices with light weight,small volume and high flexibility,electroless plating and electrooxidation were used to prepare metallic@metallic hydroxide composite fiber electrode (NiCo@NiCoDH/CF) with nanostructured hierarchical structure on carbon fiber (CF).CF had larger surface,and used as the matrix of fiber electrode.Flexible supercapacitor (wSC-NC) was formed by embedding fiber electrode into fabric as a weft yarn and combining gel electrolyte.The results showed that the surface of NiCo@NiCoDH/CF treated by electrooxidation was evenly distributed in granular and laminar multistage structures,after 5000 cycles,the capacitance retention rate was over 99%;In order to show that wSC-NC can withstand long-term and repeated deformation,the cyclic volt-ampere curves before and after the capacitor folded 1000 times were compared by bending test.The results shown that there was almost no capacitance loss after the capacitor was folded 1000 times.
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基金资助
国家自然科学基金(51303022);中央高校基础研究基金(2232015D3-17);上海市教委产学研项目(助推计划)(15cxy55)
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