Hierarchical porous carbons with localized graphene structure, high specific surface area and large pore volume are simply synthesized by the means of short-time pyrolysis at moderate temperatures and acid-washing. Citric acid and cobalt acetate were used as carbon source and template precursor, the effect of mass ratio of citric acid/cobalt acetate on the microstructures of the hierarchical porous carbon, including morphology, crystal structure, porosity, specific surface area and surface chemistry, have been investigated. The resultant hierarchical porous carbons possess high specific surface area of 1411 m²/g, a large pore volume of 2.34 cm³/g. Both three-electrode and two-electrode test were conducted to evaluate capacitive performance of the hierarchical porous carbon. The test of three-electrode system with 6 M KOH aqueous solution as electrolyte, the hierarchical porous carbon shows superior specific capacitance up to 239 F/g at 0.1 A/g. In 1 M Na₂SO₄ aqueous electrolyte. Moreover, the hierarchical porous carbon based two-electrode supercapacitors presents gravimetric energy density of 11.6 Wh/kg and power density of 250 W/kg. This work developed a facile way for high surface areas and large pore volume electrode materials for energy storage devices.

中文翻译：

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具有发达的石墨烯域的分级多孔碳的简单合成，可用于高性能超级电容器

通过在中等温度下短时间热解和酸洗，可以简单地合成具有局部石墨烯结构，高比表面积和大孔体积的多级多孔碳。柠檬酸和乙酸钴被用作碳源和模板前体，柠檬酸/乙酸钴的质量比对分层多孔碳的微观结构，包括形貌，晶体结构，孔隙率，比表面积和表面化学性质的影响很大。被调查了。所得的分级多孔碳具有1411 m ² / g的高比表面积，2.34 cm ³的大孔体积/G。进行了三电极和两电极测试，以评估分层多孔碳的电容性能。在以6 M KOH水溶液为电解质的三电极系统测试中，分层多孔碳在0.1 A / g时显示出高达239 F / g的优异比电容。在1 M Na ₂ SO ₄水溶液中。此外，分层多孔碳基双电极超级电容器的重量能量密度为11.6 Wh / kg，功率密度为250 W / kg。这项工作为储能装置的高表面积和大孔体积的电极材料开发了一种简便的方法。