Wang Liangcai, Xie Linen, Feng Xin, Ma Huanhuan, Li Xiang, Zhou Jianbin
College of Materials Science and Engineering, Nanjing Forestry University, 210037 Nanjing, China.
ACS Omega. 2021 Nov 22;6(48):33171-33179. doi: 10.1021/acsomega.1c05617. eCollection 2021 Dec 7.
Finding low-cost and environmentally friendly precursors that can maintain their electrochemical attraction natural texture properties while obtaining hierarchical porous carbons with high electrochemical performance is desirable for offering a leap forward in industrial applications. However, phenomena associated with the high microporosity of porous carbon remain. Herein, the protective effect of hydrothermal methods and the micropore-forming ability of KOH were used. The as-synthesized porous carbon (PC-1) holds the natural texture property (the retention of texture property with apertures higher than 2 nm was up to 80%) and achieves three-dimensional (3D) architecture with hierarchical structures accompanied by an ultrahigh specific surface area (3559.45 m/g). Benefiting from its texture properties, PC-1 possesses a high specific capacitance of 288.75 F/g at 0.5 A/g, excellent rate capability as high as 223.72 F/g at 10 A/g, and remarkable conductivity in a three-electrode system with a 6 M KOH electrolyte. In view of its environment friendliness, low cost, and excellent specific capacitance, PC-1 has promising applications in high-performance supercapacitors.
寻找能够在获得具有高电化学性能的分级多孔碳的同时保持其电化学吸引力自然纹理特性的低成本且环保的前驱体，对于在工业应用中取得飞跃是很有必要的。然而，与多孔碳的高微孔率相关的现象仍然存在。在此，利用了水热法的保护作用和KOH的造微孔能力。所合成的多孔碳（PC-1）保持了自然纹理特性（孔径大于2nm的纹理特性保留率高达80%），并实现了具有分级结构的三维（3D）架构，同时具有超高的比表面积（3559.45 m²/g）。得益于其纹理特性，PC-1在0.5 A/g时具有288.75 F/g的高比电容，在10 A/g时具有高达223.72 F/g的优异倍率性能，并且在含有6 M KOH电解质的三电极体系中具有出色的导电性。鉴于其环境友好性、低成本和优异的比电容，PC-1在高性能超级电容器中具有广阔的应用前景。
