The synthesis and electrical double-layer capacitor (EDLC) application of hierarchical porous bio-carbons with micropores to macropores have attracted considerable attention due to the limited fuels and environmental issues. The dependence of EDLC performance on the microstructure, pore texture, electrical conductivity and surface functionality of porous carbon aerogels (PCAs) originating from bamboo cellulose, were investigated. The result demonstrates that the highest stability EDLC has excellent cycle life with 100% capacitance retention at 30,000th cycle, which is mainly attributed to a hierarchically porous structure of owning a large micropore volume and a small mean pore size instead of the highest specific surface area. The superior capacitance and rate capability are highly dependent on the surface area and pore volume of PCAs, which are improved by increasing both activation temperature and KOH mass. These results provide another view for developing renewable and high-stable supercapacitors based on porous carbon aerogels with a large micropore volume.

中文翻译：

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用竹纤维素纤维定制多孔碳气凝胶，用于高性能超级电容器

由于有限的燃料和环境问题，具有微孔的分级多孔生物碳在大孔上的合成和双电层电容器（EDLC）的应用引起了相当大的关注。研究了EDLC性能对源自竹纤维素的多孔碳气凝胶（PCA）的微观结构，孔结构，电导率和表面功能的依赖性。结果表明，最高稳定性的EDLC具有出色的循环寿命，在第30,000次循环时具有100％的电容保持率，这主要归因于其具有大的微孔体积和较小的平均孔径而不是最高的比表面积的分层多孔结构。优异的电容和倍率能力高度取决于PCA的表面积和孔体积，通过增加活化温度和KOH质量可改善这些性能。这些结果为开发基于具有大微孔体积的多孔碳气凝胶的可再生和高稳定超级电容器提供了另一种观点。