复合导电剂在超细炭微球超级电容器中的应用研究  

Study on the Application of Composite Conductive Agent in Ultrafine Hollow Carbon Spheres Supercapacitors

作　　者：赵芸 郭逸青 赵晓欢 梁杰 矫庆泽 ZHAO Yun;GUO Yiqing;ZHAO Xiaohuan;LIANG Jie;JIAO Qingze(School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China;Zhuhai,Beijing Institute of Technology,Zhuhai,Guangdong 519085,China)

机构地区：[1]北京理工大学化学与化工学院,北京100081 [2]北京理工大学珠海学院,广东,珠海519085

出　　处：《北京理工大学学报》2022年第12期1321-1328,共8页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(21376029)。

摘　　要：导电剂能否在电极材料中形成良好的导电网络是影响超级电容器性能的关键因素之一.以改进Stöber法合成了高比表面积且具有多级孔结构的超细空心炭微球,以其为电极材料,对比研究了碳纳米管/炭黑复合导电剂与单一导电剂对基于超细空心炭微球超级电容器性能的影响.研究发现,在0.2 A/g的电流密度下,采用复合导电剂时其比电容为205.7 F/g,远高于单一导电剂时的比电容.尤其在100 A/g的大电流密度下,采用复合导电剂时的比电容高达104.0 F/g,相比炭黑导电剂提高了275%.分析表明,纤维状的碳纳米管和炭黑可在本身易团聚的超细空心炭微球中形成点-线协同作用的导电网络,这是提升超级电容器性能的主要原因.Whether the conductive agent could form a good conductive network in the electrode materials is one of the key factors that affect the performance of supercapacitor.Ultrafine hollow carbon spheres with high specific surface area and hierarchical pore structure,synthesized based on the modified Stöber method,were taken as the electrode materials of supercapacitors.And the effects of single-walled carbon nanotubes/carbon black composite conductive agents on the performance of supercapacitor were studied with single carbon black or single-walled carbon nanotubes as the contrast.The results show that at current density of 0.2 A/g,the specific capacitance of sample with the composite conductive agents is 205.7 F/g,being much higher than that of carbon black or carbon nanotubes alone.At a high current density of 100 A/g,the specific capacitance can remain a high value of 104.0 F/g for the composite conductive agent sample,heightening 275%than that of carbon black.The examining results indicate that the long fibrous carbon nanotubes and carbon black particles can form a dot-line synergistic conductive network in the ultrafine hollow carbon spheres,which is the main reason of improving the performance of supercapacitors.

关 键 词：超级电容器 多孔炭微球 导电剂 碳纳米管 炭黑 

分 类 号：TM53[电气工程—电器]