电化学混合电容器用新型聚吡咯/介孔碳纳米复合电极  

Novel Polypyrrole/Mesoporous Carbon Nanocomposite Electrode for an Electrochemical Hybrid Capacitor

作　　者：张晶[1] 孔令斌[1,2] 蔡建军[1] 杨贞胜[1] 罗永春[2] 康龙[2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050 [2]兰州理工大学材料科学与工程学院,兰州730050

出　　处：《物理化学学报》2010年第6期1515-1520,共6页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(50602020);国家基础研究重大项目(973)计划前期研究专项(2007CB216408)资助~~

摘　　要：采用介孔碳CMK-3作为载体,通过化学原位聚合的方法制备出一种新型的聚吡咯/介孔碳(PPy-CMK-3)纳米复合材料.将该纳米复合材料作为正极,配以介孔碳CMK-3为负极和1.0mol·L-1NaNO3中性电解液,组装成为电化学混合电容器.电化学测试表明:在5.0mA·cm-2电流密度和1.4V充放电电位条件下,其放电比容量达57F·g-1,电容器功率密度为2.5×102W·kg-1,能量密度达17Wh·kg-1.当电流密度从5.0mA·cm-2增加至50mA·cm-2时,电容器的容量保持率在80%以上,显示高倍率充放电特性优异.此外,聚吡咯-介孔碳/介孔碳电化学混合电容器易活化,并具有优异的充放电效率和良好的循环稳定性能.With mesoporous carbon（CMK-3） serving as a support,we prepared a novel nanocomposite of polypyrrole/mesoporous carbon（PPy-CMK-3） by an in situ chemical polymerization method.An electrochemical hybrid capacitor was successfully designed using a PPy-CMK-3 composite and CMK-3 as positive and negative electrodes,respectively.The electrochemical capacitance performance of this kind of hybrid capacitor was investigated in 1.0 mol·L-1 NaNO3 electrolyte solution.The discharge capacity of the hybrid capacitor reached 57 F·g-1 under a current density of 5.0 mA·cm-2 and cell voltage of 1.4 V.The energy density of the hybrid capacitor reached 17 Wh· kg-1 with a power density of 2.5×102 W·kg-1.When the current density was increased from 5.0 to 50 mA·cm-2,the capacity of the hybrid capacitor remained at about 80% and it showed excellent high rate charge-discharge performance.Furthermore,the PPy-CMK-3/CMK-3 hybrid capacitor containing this PPy-CMK-3 nanocomposite could be active easily and it possessed a high charge-discharge efficiency and good cycle performance.

关 键 词：介孔碳 聚吡咯 电化学混合电容器 能量密度 

分 类 号：TM53[电气工程—电器]