摘要
以1-甲基-3-乙基咪唑四氟硼酸离子液体和果糖为原料,微波作用下一步制得一种新型碳点离子液体复合物,用此复合物代替部分导电剂和粘结剂制成新型炭基超级电容器,并与传统的炭基超级电容器进行了比较研究。结果表明:所制复合物中有大量直径小于4nm的碳纳米粒子,70℃时电导率达到13.26×10–3S·cm–1。所制超级电容器充放电效率由传统炭基超级电容器的89.1%提高到97.3%,比电容由115.7 F.g–1提高到251.1 F·g–1,内阻由1.95Ω 降低为1.23Ω ,且循环性能显著提高。
A new carbon nanoparticle ionic liquid hybrid （CNPIL） was synthesized from ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate and fructose by a facile one-step microwave synthetic method. Adding the CNPIL as conductive agent and binder, a new carbon based supercapacitor was prepared and compared with the traditional carbon based supercapacitor. The results show that spherical carbon nanoparticles with diameter below 4 nm exist in CNPIL. The CNPIL shows the high conductivity of 13.26×10–3 S·cm–1 at 70 ℃. The charge-discharge efficiency of prepared supercapecitors improves from 89.1% to 97.3%. The speci？c capacitance reaches 251.1 F·g–1 from 115.7 F·g–1. The internal resistance has fallen from 1.95 Ω of traditional carbon supercapacitor to 1.23 Ω of new carbon based supercapacitor. In addition, the cycle ability of new carbon based supercapacitor increase significantly.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2012年第7期15-18,共4页
Electronic Components And Materials
基金
国家自然科学基金资助项目(No.21003081)
辽宁省教育厅重点实验资助项目(No.2009S003
No.LS201001)
关键词
超级电容器
碳点离子液体
微波合成法
电化学性能
supercapacitor
carbon nanoparticle ionic liquid
microwave synthetic method
electrochemical property
