摘要
以煤为原料,KOH为活化剂,采用微波辐射加热法和电阻炉加热法制备出双电层电容器用活性炭。对比研究了两种工艺下KOH用量、活化时间对活性炭比电容量的影响,考察了活性炭双电层电容器的充放电特性。结果显示:微波活化时,ζ(KOH∶煤)为3∶1,起电弧时间5min,比电容为283.67F/g;电阻炉活化时,ζ(KOH∶煤)为4∶1,保温时间为1h,比电容为235.55F/g。经过100次循环充放电后,微波法和电阻炉法所得的活性炭的比电容分别保持在98.10%和91.04%。
Activated carbon for electric double layer capacitors was prepared from coal by activation with KOH through heating by microwave radiation and resistance furnace heating. Compared two methods, the influence of the proportion of KOH to coal and the time of activation were studied. Its charge-discharge performance of the coal based AC EDLC was tested. It shows that microwave radiation can increase the specific capacitance of AC 283.67 F/g for microwave compared with 235.55 F/g for furnace, reduce the proportion of KOH to coal and decrease the time of activation 5 mins for microwave compared with 1 h for furnace. Moreover, the EDLCs with AC as electrodes by microwave radiation have cyclic stability 98.10 % for microwave compared with 91.04 % for furnace after 100 cycling.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2006年第12期31-33,共3页
Electronic Components And Materials
基金
国家自然科学基金资助项目(5030700)
关键词
电子技术
煤
活性炭
微波活化
电阻炉活化
电极材料
双电层电容器
electronic technology
coal
activated carbon
microwave radiation
resistance furnace radiation
electrode material
electric double layer capacitors
