化学
超级电容器
电解质
壳聚糖
多孔性
化学工程
碳纤维
电化学
电极
有机化学
复合材料
复合数
物理化学
材料科学
工程类
作者
Xinyi Wang,Xiaozhong Wu,Xin Zhou,Ze-Wen Ding,Tonghui Cai,Pengfei Zhou,Jin Zhou,Shuping Zhuo
标识
DOI:10.1016/j.jelechem.2024.118243
摘要
Microporous carbon (PC-C) was prepared using chitosan and ZnCl2 as carbon precursor and activating agent, respectively. Electrochemical measurements and material characterization show that the microporous nature of PC-C limits the ion transfer in H2SO4 electrolyte, resulting in a lower specific capacitance and rate performance in H2SO4 electrolyte compared with KOH electrolyte. Trimesic acid was introduced into the carbon precursor to regulate the porous structure by generating more meso- and macropores, which facilitate the transmission of electrolyte ions with bigger ionic size. In this case, the specific capacitance of the modified carbon can reach up to 180 from 84.6 F g−1 in H2SO4 electrolyte. The assembled supercapacitor cell in H2SO4 electrolyte can deliver an energy density of 4.9 Wh kg−1 at a high-power density of 2500 W kg−1, which is much higher than that (0.4 Wh kg−1) of PC-C. Our study provides a guidance for the preparation and regulation of porous carbon suitable for different aqueous electrolytes.
科研通智能强力驱动
Strongly Powered by AbleSci AI