High performance of supercapacitor based on aligned activated graphene with extremely wide temperature range
- High performance of supercapacitor based on aligned activated graphene with extremely wide temperature range
- Issue Date
- RSC advances
- VOL 5, 71699-71703
- Supercapacitors with a broad operational temperature range, especially with the capability of operating at low temperature (below 50 C), are required for applications in extreme environments. This paper presents a high performance supercapacitor, consisting of highly aligned nano-porous graphene(A-NPG) with an eutectic mixture of ionic liquids (ILs), 1-butyl-4-methylpyridinium tetrafluoroborate (BMPBF4) in 1-butyl-3-methylimidazolium tetrafluoroborate (BMIBF4), which exhibits a high capacitance performance over a temperature range from 50 C to 80 C. The experimental results reveal a reducing of melting temperature Tm of the eutectic mixture to 74 C, compared with 39 C of BMIBF4. The increased ionic conductivity and reduced Tm of the eutectic mixture, combined with ultrahigh density A-NPG electrodes, enable the supercapacitor to show a high capacitance of 125 F cm 3 at room temperature and 106 F cm 3 at 50 C. In contrast, the supercapacitor with pure BMIBF4 shows a capacitance of 119 F cm 3 and 16.5 F cm 3 at room temperature and 50 C, respectively
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.