摘要
以菱角壳为前驱体,采用KOH化学活化法制备超级电容器用多孔炭,研究了不同碱炭比对多孔炭结构和电化学性能的影响。采用SEM、XRD、Raman、N2吸脱附测试对多孔炭的微观结构进行表征,并利用循环伏安、恒流充放电、长循环、交流阻抗等方法考察其电容性能。结果表明,碱炭比为4时,多孔炭具有最高的比表面积(2046.74 m^2/g)和最丰富的孔结构,以TEABF4/PC为电解液组装成超级电容器,在0.1 A/g电流密度下,其比电容高达126.1 F/g,以0.5 A/g电流密度循环10000次,其比电容仍保持92.6 F/g,展现出良好的电容性能。
Porous carbon for supercapacitor was prepared by KOH chemical activation method with water chestnut shell as the precursor.The effects of different impregnation on the structure and electrochemical properties of the porous carbon were systematically investigated.The microstructure of porous carbon was characterized by SEM,XRD,Raman and N2 adsorption-desorption,and the capacitive properties were studied by using cyclic voltammetry,galvanostatic charge-discharge,long cycle and electrochemical impedance spectroscopy.The results show that the porous carbon manifested the highest specific surface area up to 2046.74 m2/g and the most abundant pore structure when the impregnation ratio was 4∶1.As the electrode materials in supercapacitor with TEABF4/PC as the electrolyte,the porous carbon exhibited a maximum specific capacitance of 126.1 F/g at the current density of 0.1 A/g and retained a specific capacitance of 92.6 F/g at 0.5 A/g after 10000 cycles,which exhibited superior capacitive properties.
作者
肖祥
王超
赵亚彬
钟国彬
王佩
伍世嘉
曾杰
魏增福
时志强
XIAO Xiang;WANG Chao;ZHAO Yabin;ZHONG Guobin;WANG Pei;WU Shijia;ZENG Jie;WEI Zengfu;SHI Zhiqiang(Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China;Tianjin Key Laboratory of Advanced Fibers and Energy Storage, College of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2019年第12期12080-12084,共5页
Journal of Functional Materials
基金
中国南方电网有限责任公司科技资助项目(GDKJXM20160000)
关键词
菱角壳
活化
多孔炭
超级电容器
电化学性能
water caltrop shell
chemical activation
porous carbon
supercapacitor
electrochemical properties
