摘要
以改进Hummers法制备的氧化石墨烯和碳纳米管(CNT)为原料,通过高温还原和低温造孔,一步制备多孔石墨烯(m-Gr)/CNT复合材料。研究m-Gr/CNT复合材料作为导电剂,对活性炭基双电层超级电容器的影响。m-Gr/CNT导电剂可增加电解液与材料的接触,为离子的穿梭提供有利途径。加入m-Gr/CNT复合导电剂的软包装超级电容器,以5 A/g的电流在0.01~3.20 V循环15000次,电容保持率为91%,放电比电容由初始值141.3 F/g降到128.6 F/g。
Porous graphene(m-Gr)/carbon nanotube(CNT)composites were prepared in one step,using graphene oxide obtained by the modified Hummers method and CNT as raw materials by reducing at high temperature and pore-forming at low temperature.The effect of m-Gr/CNT as conductive agent on activated carbon based-double electric layer supercapacitor was studied.The m-Gr/CNT conductive agent could increase the contact between electrolyte and material,provide a favorable way for the shuttle of ions.The m-Gr/CNT composite conductive agent was added to assemble a soft pack supercapacitor.After cycled 15000 times at the current of 5 A/g in 0.01-3.20 V,the capacitance retention rate was 91%,the specific discharge capacitance decreased to 128.6 F/g from the initial value 141.3 F/g.
作者
李祥元
刘鹏刚
张开
王亭
LI Xiang-yuan;LIU Peng-gang;ZHANG Kai;WANG Ting(Xi′an Herong New Energy Technology Co.,Ltd.,Xi′an,Shaanxi 710000,China)
出处
《电池》
CAS
北大核心
2021年第3期257-260,共4页
Battery Bimonthly
