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首页> 外文期刊>RSC Advances >N-Doped hierarchical porous carbon from waste boat-fruited sterculia seed for high performance supercapacitors
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N-Doped hierarchical porous carbon from waste boat-fruited sterculia seed for high performance supercapacitors

机译：废船果核种子中的N掺杂分级多孔碳，用于高性能超级电容器

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N-Doped hierarchical porous carbon (NHPC) was obtained from waste boat-fruited sterculia seed by hydrothermal carbonization and KOH activation. The influence factors including the ratio of activation agent to precursor, activation temperature, and heteroatom-doping were discussed. The results showed that the NHPC-800-1 activated at 800?°C with the ratio of activation agent to precursor being 1 as an electrode in an electrical double layer capacitor (EDLC) exhibited the best electrochemical performance in 6 M KOH electrolyte. It delivered the specific capacitance up to 337 F g?1 at a current density of 1 A g?1, and still retained a capacitance of 181.5 F g?1 at the high current density of 50 A g?1. This material also shows an excellent capacitance retention of 98.8% after 5000 cycles at a current density of 20 A g?1. In addition, a symmetric supercapacitor fabricated by NHPC-800-1 released an energy density of 8.05 W h kg?1 at a power density of 10 kW kg?1, and a high cycling stability with a capacitance retention of 98.5% over 10?000 cycles at 20 A g?1 in 6 M KOH electrolyte. The superior performance of NHPC-800-1 could be attributed to these advantages of hierarchical porous structure, narrow micropore size distribution and rational micro/mesopore ratio, as well as the doping of the N atoms. These very attractive electrochemical properties indicate that the NHPC-800-1 derived from boat-fruited sterculia is a promising electrode material for supercapacitors.
机译：通过水热碳化和KOH活化从废船果实的密闭种子中获得了N掺杂的分级多孔碳（NHPC）。讨论了影响因素，包括活化剂与前驱体的比例，活化温度和杂原子掺杂。结果表明，在双电层电容器（EDLC）中，以800℃活化的NHPC-800-1电极中活化剂与前体的比率为1，在6 M KOH电解质中表现出最佳的电化学性能。它以1 A g ？1 的电流密度提供了高达337 F g ？1 的比电容。 ，并且在50 A g ？1 ？1 的电容>。在20 A g ？1 的电流密度下，经过5000次循环后，该材料还具有98.8％的优异电容保持率。此外，由NHPC-800-1制造的对称超级电容器在10 kW kg <的功率密度下释放了8.05 W h kg ？1 的能量密度。 sup>？1 ，具有很高的循环稳定性，在20 A g ？1 时，在10 000次循环中的电容保持率为98.5％在6 M KOH电解质中。 NHPC-800-1的优异性能归因于分层多孔结构，狭窄的微孔尺寸分布和合理的微/中孔比以及N原子的掺杂这些优点。这些非常吸引人的电化学特性表明，源自船形菌根的NHPC-800-1是用于超级电容器的有希望的电极材料。

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