Fungi-derived hierarchically porous carbons for high-performance supercapacitors
Fungi-derived hierarchically porous carbons for high-performance supercapacitors
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DOI：
10.1039/c4ra13358g
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发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Jiacheng Wang;Qian Liu
中科院分区：
文献类型：
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作者：
Jiacheng Wang;Qian Liu
多级孔活性炭（AC）是通过化学活化程序制备的，以可持续的、可再生的生物质真菌作为碳前体，KOH作为活化剂。所生产的多孔活性炭不仅具有包含大孔骨架和微孔纹理的分级多孔结构，而且具有高达2264 m2 g−1的高比表面积、高达1.02 cm3 g−1的大孔体积和可调节的杂原子掺杂（氮：2.15–4.75 wt%；氧：8.53–14.48 wt%）。通过调节KOH/碳前驱体的质量比可以轻松控制微观结构特征。多孔活性炭在有机电解质中的比电容高达 158 F g−1，明显优于市售活性炭。当电流密度从0.1增加到5 A g−1时，基于真菌的ACs电极还保留了93%的比电容，并且具有优异的循环性能（10 000次循环后保留了92%）。
Hierarchical porous activated carbons (ACs) were prepared via a chemical activation procedure with sustainable, renewable biomass fungi as carbon precursor and KOH as activating reagent. The as-produced porous ACs present not only a hierarchical porous structure containing macroporous frameworks and microporous textures, but also a high specific surface area of up to 2264 m2 g−1, a large pore volume of up to 1.02 cm3 g−1, and adjustable heteroatom doping (nitrogen: 2.15–4.75 wt%; oxygen: 8.53–14.48 wt%). The microstructural features can be easily controlled by adjusting the mass ratio of KOH/carbon precursor. The porous ACs possess a specific capacitance of up to 158 F g−1 in organic electrolyte, which significantly outperforms the commercially available ACs. The fungi-based ACs electrode also retains 93% of the specific capacitance as the current density increases from 0.1 to 5 A g−1, and has superior cycling performance (92% retention after 10 000 cycles).