PVDC基活性炭的制备与电容性能  

Preparation and capacitive performance of PVDC-based activated carbon

作　　者：任军[1] 徐斌[2] 张世超[3] 朱红[1] 

机构地区：[1]北京交通大学理学院,北京100044 [2]防化研究院,北京100083 [3]北京航空航天大学材料科学与工程学院,北京100083

出　　处：《电池》2008年第3期136-138,共3页Battery Bimonthly

基　　金：国家863项目(2006AA11A165,2006AA03Z342);国家自然科学基金重点项目(20633040)

摘　　要：以聚偏二氯乙烯(PVDC)为原料、采用水蒸气活化制备超级电容器用活性炭电极材料。采用N2吸附法对材料的比表面和孔结构进行了研究,通过恒流充放电和循环伏安测试等方法研究了材料在6 mol/L KOH溶液中的电化学电容性能。结果表明,该方法在900℃下可制备出高比表面积(2 296 m2/g)、富含中孔(中孔率为42.7%)的活性炭材料,适合用作超级电容器的电极材料。在880℃下活化1 h制备的活性炭,比电容为177 F/g(50 mA/g),大电流倍率性能良好。Activated carbon electrode material for supercapacitor was prepared from polyvinylidene chloride （PVDC） as raw material by steam activation. The specific surface area and pore structure of the material were studied by N2 adsorption method. The electrochemical performance of the material in 6 mol/L KOH solution was analyzed by galvanostatic charge-discharge and cyclic vohammetry tests. The results showed that activated carbon material with high specific surface area （2 296 m^2/g） and abundant mesopores （mesoporosity ratio was 42.7%） could be prepared by this method at 900 ℃. It was suitable for electrode material of supercapacitor. The activated carbon prepared at 880 ℃ and activated for 1 h had the specific capacitance of 177 F/g （50 mA/g） and good large current rate performance.

关 键 词：超级电容器 聚偏二氯乙烯(PVDC) 水蒸气活化 比电容 

分 类 号：TM531[电气工程—电器]