Yang Kai, Fan Qingwen, Zhang Yuchun, Ren Gangxin, Huang Xinfeng, Fu Peng
College of Agricultural Engineering and Food Science, Shandong University of Technology Zibo 255000 China
School of Engineering and Physical Sciences, Heriot-Watt University Edinburgh EH14 4AS UK.
RSC Adv. 2024 Jan 2;14(2):1123-1133. doi: 10.1039/d3ra07014j.
Supercapacitors (SCs), as new energy storage devices with low cost and high performance, urgently require an electrode material with good pore structure and developed graphitization. Herein, we report a 3D hierarchical porous structured carbon aerogel (CA) obtained dissolving-gelling and a subsequent carbonizing process. The gelling process was realized by using different types of anti-solvents. The carbon aerogel-acetic acid (CA-AA) has a specific surface area of 616.97 m g and a specific capacitance of 138 F g which is superior to cellulose-based active carbon. The CA was assembled into a SC, which showed excellent cycle stability. After charging and discharging 5000 times at the current density of 1 A g, the capacitance retention ratio of CA-AA reaches 102%. In addition, CA-AA has an energy density of 10.06 W h kg when the power density is 181.06 W kg. It provides a choice for non-activation to effectively regulate the porous structure of biomass carbon materials.
超级电容器（SCs）作为低成本、高性能的新型储能装置，迫切需要具有良好孔结构和发达石墨化程度的电极材料。在此，我们报道了一种通过溶解-凝胶化及后续碳化过程获得的三维分级多孔结构碳气凝胶（CA）。凝胶化过程通过使用不同类型的反溶剂实现。碳气凝胶-乙酸（CA-AA）的比表面积为616.97 m²/g，比电容为138 F/g，优于纤维素基活性炭。将该CA组装成超级电容器，表现出优异的循环稳定性。在1 A/g的电流密度下充放电5000次后，CA-AA的电容保持率达到102%。此外，当功率密度为181.06 W/kg时，CA-AA的能量密度为10.06 W h/kg。它为有效调控生物质碳材料的多孔结构提供了一种无需活化的选择。
