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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Tunable agglomeration of Co3O4 nanowires as the growing core for in-situ formation of Co2NiO4 assembled with polyaniline-derived carbonaceous fibers as the high-performance asymmetric supercapacitors
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Tunable agglomeration of Co3O4 nanowires as the growing core for in-situ formation of Co2NiO4 assembled with polyaniline-derived carbonaceous fibers as the high-performance asymmetric supercapacitors

机译：Co3O4纳米线的可调谐附聚作为原位形成的Co2NiO4的生长芯，与聚苯胺衍生的碳质纤维组装为高性能不对称超级电容器

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Cobalt-based multicomponent oxides nanocomposites deliver extraordinary rate capabilities and electrochemical capacitance owing to the fast reaction kinetics, regarded as advanced electrodes for novel renewable energy harvest and conversion with great attention recently. Herein, by manipulating the concentration of fluoride ions (F-), the in-situ agglomeration states of cobalt oxides nanowires on 3D Ni Foam are investigated systemically, which benefiting the further growth of novel spinel Co2NiO4 through electrochemical routine. Acting as the positive electrode for supercapacitor, Co2NiO4@Co3O4 composite exhibits the specific capacitance as high as 1241.8 F g(-1), together with the excellent rate capabilities of 92.83% retention with a 20-fold specific current increase. Based on the kinetics analysis, the capacitive contribution achieves 83.3% at the scan rates of 50 mV s(-1). Matching core-shell like Co2NiO4@Co3O4 composites with self N,O-doped conducting polymers derived carbon, as-fabricated asymmetric supercapacitor (ASC) devices could deliver an energy density of 85.97 Wh kg(-1) at the power density of 0.8 W kg(-1). Taking advantage of Faradic redox electrodes couple with pseudocapacitive ones can be proved as a promising way to obtain high performance energy storage devices. (C) 2020 Elsevier B.V. All rights reserved.
机译：钴基多组分氧化物纳米复合材料因其快速反应动力学而具有优异的速率性能和电化学电容，被认为是新型可再生能源获取和转化的先进电极，近年来受到了广泛关注。本文通过控制氟离子（F-）的浓度，系统地研究了氧化钴纳米线在3D泡沫镍上的原位团聚状态，这有利于通过电化学方法进一步生长新型尖晶石Co2NiO4。作为超级电容器的正极，Co2NiO4@Co3O4该复合材料的比电容高达1241.8 F g（-1），比电流增加20倍，保持率高达92.83%。根据动力学分析，在50 mV s（-1）的扫描速率下，电容贡献达到83.3%。与核壳结构相匹配Co2NiO4@Co3O4非对称超级电容器（ASC）器件采用自掺氮氧导电聚合物碳基复合材料，在功率密度为0.8 W kg（-1）时，其能量密度为85.97 Wh kg（-1）。利用法拉第氧化还原电极与假电容电极的耦合可以被证明是获得高性能储能器件的一种很有前途的方法。（C） 2020爱思唯尔B.V.版权所有。

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