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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >A flexible fiber-shaped supercapacitor utilizing hierarchical NiCo2O4@polypyrrole core-shell nanowires on hemp-derived carbon
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A flexible fiber-shaped supercapacitor utilizing hierarchical NiCo2O4@polypyrrole core-shell nanowires on hemp-derived carbon

机译:一种柔性的纤维状超级电容器,在大麻衍生的碳上利用分层的NiCo2O4 @ polypyrrole核-壳纳米线

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摘要

A high-performance fiber-shaped electrode composed of hierarchical NiCo2O4@polypyrrole core-shell nanowires on hemp-derived carbon (HDC) microfiber is successfully fabricated, which takes advantage of the high electrical conductivity of polypyrrole and carbon microfiber to boost the pseudocapacitive performance. The as-synthesized electrode exhibits an ultrahigh specific capacitance of 2055 F g(-1), excellent rate performance and outstanding cycling stability (90% capacity retention over 5000 cycles). Based on the good mechanical flexibility and stability of the HDC, a fiber-shaped all-solid-state symmetric supercapacitor is designed which demonstrates a high energy density of 17.5 W h kg(-1) at a power density of 500 W kg(-1), good stability over 10 000 cycles and high physical flexibility.
机译:成功地在大麻衍生的碳(HDC)微纤维上制备了由分层NiCo2O4 @ polypyrrole核-壳纳米线组成的高性能纤维状电极,该电极利用了聚吡咯和碳微纤维的高电导率来提高假电容性能。合成电极表现出2055 F g(-1)的超高比电容,出色的倍率性能和出色的循环稳定性(在5000次循环中保持90%的容量)。基于HDC的良好机械柔韧性和稳定性,设计了一种纤维状全固态对称超级电容器,该电容器在500 W kg(-)的功率密度下显示出17.5 W h kg(-1)的高能量密度。 1)在10 000次循环中具有良好的稳定性,并具有很高的物理灵活性。

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