微波辐照石油焦制备双电层电容器用活性炭  

Preparation of activated carbon for electric double layer capacitors from petroleum coke by microwave radiation

作　　者：杨辉[1] 梁逵[1] 胡军[1] 杨乐之[1] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《电子元件与材料》2007年第7期11-13,16,共4页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(50307009)

摘　　要：以石油焦为原料,KOH为活化剂,采用微波辐照加热法,制备了石油焦基双电层电容器用活性炭。研究了石油焦与KOH活化剂的比例、微波功率以及微波辐照时间对活性炭孔径分布和比电容量的影响。结果表明:在KOH活化剂与石油焦的质量比为3.5∶1,微波功率800W和辐照时间7min时,制备的活性炭比表面积为2031.96m2/g,比电容量达286.79F/g,以该活性炭作电极的双电层电容器有良好的循环稳定性和充放电性能。Activated carbon for electric double layer capacitors （EDLC） was prepared from petroleum coke activated by KOH through microwave radiation. The influences of the mass ratio of KOH to petroleum coke, microwave radiation power and time on the pore size distribution of the activated carbon and the specific capacitance of EDLC were studied. The results show that the BET specific surface area of petrol coke-based activated carbon can reach 2 031.96 m^2/g, and the specific capacitance can reach 286.79Fig while the mass ratio of KOH to petroleum coke is 3.5 ： 1 and the radiation power and time of microwave are 800 W and 7 minutes, respectively. Moreover, the EDLC with the activated carbon as electrodes exhibits excellent cyclic stability.

关 键 词：无机非金属材料 双电层电容器 微波辐照 石油焦 活性炭 比电容量 

分 类 号：TQ424.1[化学工程]