离子液体型双电层电容器在45℃和3 V状态下的长周期运行研究  

Long Period Operation of Ionic Liquid Based Electrical Double Layer Capacitor at 45℃and 3 V

作　　者：叶珍珍 陈鑫祺 张抒婷 汪剑[1] 崔超婕[1] 张刚 张磊 钱陆明 金鹰 骞伟中[1] YE Zhenzhen;CHEN Xinqi;ZHANG Shuting;WANG Jian;CUI Chaojie;ZHANG Gang;ZHANG Lei;QIAN Luming;JIN Ying;QIAN Weizhong(Department of Chemical Engineering,Tsinghua University,Haidian District,Beijing 100084,China;Zhongtian Supercapacitor Technology Co.,Ltd.,Nantong 226009,Jiangsu Province,China;Jiangsu Zhongtian Carbonmaterial Co.,Ltd.,Nantong 226009,Jiangsu Province,China)

机构地区：[1]清华大学化工系,北京市海淀区100084 [2]中天超容科技有限公司,江苏省南通市226009 [3]江苏中天碳基材料有限公司,江苏省南通市226009

出　　处：《发电技术》2023年第2期213-220,共8页Power Generation Technology

基　　金：国家自然科学基金项目(22109085,21975142);江苏省科技成果转化专项基金项目(BA2020058)。

摘　　要：对覆炭泡沫铝基介孔炭-离子液体双电层电容器在45℃、3 V状态下的长周期运行规律进行了研究。采用覆炭泡沫铝集流体嵌入介孔活性炭形成复合极片,以EMIBF4离子液体为电解液,组成3 cm×5 cm软包,在45℃、3 V状态下研究了长达1500 h充放电的运行规律。结果发现,内阻变化率在10%左右,电容保持率高达98%,远优于有机液体型双电层电容器在2.7 V、65℃状态下的内阻与电容保持效果。还对比了离子液体型双电层电容器在2.7 V、65℃与3 V、45℃下的产气规律,结果表明,介孔炭-离子液体-覆炭泡沫铝型双电层电容器软包可以在3 V、45℃、1500 h条件下稳定工作。研究结果为进一步推进离子液体型双电层电容器的应用提供了坚实基础。The long period operation at 45℃and 3 V of the mesoporous carbon-ionic liquid-carbon covered aluminum foam based electrical double layer capacitor was studied.The composite electrode sheet was formed by embedding mesoporous carbon with carbon-coated aluminum foam,and the 3 cm×5 cm pouch was composed of EMIBF4 as electrolyte.The operation law of charge and discharge was studied at 45℃and 3 V for 1500 h.It is found that the internal resistance change rate is about 10%,and the capacitance retention rate is as high as 98%,both of which are far better than those of organic liquid-based electrical double layer capacitor at 2.7 V and 65℃.The gas generation of pouches at 2.7 V/65℃and 3 V/45℃was compared.It is proved that the soft package of mesoporous carbon-ionic liquid-carbon-coated aluminum foam based electrical double layer capacitor can work stably at 3 V,45℃for 1500 h.It provides a solid foundation for further promoting the application of ionic liquid-based electrical double layer capacitor.

关 键 词：储能 双电层电容器 离子液体 覆炭泡沫铝 介孔炭 高温老化 

分 类 号：TK02[动力工程及工程热物理] TM53[电气工程—电器]