摘要
以NaOH为活化剂、采用蔗糖水热法,制备超级电容器用高比表面积球形活性炭电极材料。采用标准N2吸附法、SEM和XRD对活性炭的结构进行表征,用恒流充放电测试其在1mol/L Et4NBF4/PC电解液中的电化学性能,并将其与日本商业电容炭YP17进行了比较。结果表明:ζ(NaOH∶活性炭)为5∶1、600℃活化1h制备的球形活性炭比表面积为3261m2/g,其比电容可达156F/g,远大于YP17(108F/g),大电流倍率性能突出。
High specific surface area spherical activated carbon electrode materials were prepared by sucrose-hydrothermal method and NaOH activator for supercapacitors. The microstructure of the material was characterized by BET method, SEM and XRD measurements, its electrochemical performances in 1mol/L Et4NBF4/PC electrolyte were evaluated by galvanostatic charge-discharge. For comparison, the performance of a Japanese commercial capacitive carbon YP17 was also measured. The results show that spherical activated carbon with specific surface area as high as 3 261 m2/g can be prepared at 600℃ for 1 h with a mass ratio ofNaOH ： C of 5 ： 1. Its specific capacitance can reach 156 F/g, which is much higher than YP 17 （108 F/g）. The carbon also presents good rate performance.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2009年第8期59-61,共3页
Electronic Components And Materials
基金
国家“863”计划资助项目(No.2006AA11A165)
关键词
球形炭
超级电容器
NaOH活化
比表面积
比电容
spherical carbon
supercapacitor
NaOH activation
specific surface area
specific capacitance
