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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Biowaste-derived 3D honeycomb-like porous carbon with binary-heteroatom doping for high-performance flexible solid-state supercapacitors
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Biowaste-derived 3D honeycomb-like porous carbon with binary-heteroatom doping for high-performance flexible solid-state supercapacitors

机译：BiOWasty-衍生3D蜂窝状多孔多孔碳，具有二元杂原子掺杂，适用于高性能柔性固态超级电容器

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摘要

Corncob sponge is a type of agricultural abandoned byproduct and abundant around the world. Herein, a facile one-pot carbonization and activation method is developed to convert corncob sponge into three-dimensional (3D) interconnected honeycomb-like porous carbon, followed by an effective binary-heteroatom doping to fabricate nitrogen and sulfur co-doped activated corncob sponge (denoted as N, S-ACS). The resultant products possess a high accessible surface area (1874 m(2) g(-1)) induced by the 3D honeycomb-like framework and a highly porous structure that benefits a large ion storage and a rapid ion transfer. In addition to the electrical double layer capacitance, heteroatom doping evokes faradic contribution. N, S-ACS demonstrates a remarkable specific capacitance of 404 and 253 F g(-1) at the current densities of 0.1 and 10 A g(-1) in a 6 mol L-1 KOH electrolyte, respectively, along with a high cycling stability with only 1% loss over 10 000 cycles. Furthermore, the assembled symmetric flexible solid-state supercapacitors with the electrode of N, S-ACS and the electrolyte of a PVA/KOH gel display a high integrated energy-power density of 30 W h kg(-1) at 8 kW kg(-1) and a 99% capacitance retention after 10 000 cycles at 3 A g(-1). The fascinating performance significantly endows N, S-ACS with great prospects as a supercapacitor electrode.
机译：Corncob Sponge是一种农业副产品，世界各地丰富。在此，开发了一种容易的单壶碳化和活化方法以将玉米板海绵转化为三维（3D）相互连接的蜂窝状多孔碳，其次是有效的二元杂原子掺杂，以制造氮和硫共掺杂的活化玉米板海绵（表示为N，S-ACS）。所得产物具有由3D蜂窝状框架诱导的高可接近表面积（1874m（2）G（-1））和具有有益于大离子储存和快速离子转移的高度多孔结构。除了电气双层电容外，杂种掺杂唤起了法拉克贡献。 N，S-ACS分别在6mol L-1 KOH电解质中，在6mol L-1 KOH电解质中，在6mol L-1 KOH电解质中，在6mol L-1 KOH电解质中的光学密度下表现出了显着的特定电容404和253fg（-1）。循环稳定性仅为10 000次循环损失1％。此外，具有N，S-ACS和PVA / KOH凝胶的电极的电极的组装对称柔性固态超级电容器在8 kW kg下显示高集成的能量 - 功率密度为30 w h kg（-1）（ -1）和3A G（-1）的10 000个循环后的99％电容保留。迷人的性能显着赋予N，S-ACS具有优异的超级电容器。

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