期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 23, 期 6, 页码 1667-1683出版社
SPRINGER
DOI: 10.1007/s10008-019-04272-y
关键词
-
资金
- National Science Foundation [1318202]
- University Grant Commission (UGC) India
- Analytical and Diagnostics Laboratory (ADL), a part of Center of Excellence in Small Scale Integration and Packaging at Binghamton University [ADLG-181]
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1318202] Funding Source: National Science Foundation
The electrochemical properties and high-density energy storage performance of graphene nano-platelet-based solid-state electrical double-layer supercapacitor device are reported. The graphene device is fabricated with electrolyte comprising of 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) room temperature ionic liquid and LiClO4 dopant entrapped within polymer matrix formulated as a gel. The mesoporous graphene electrode was formed via dispersion in amorphous polyvinylidene (PVdF(2)) host over flexible graphite sheets with minimal graphene layer (<5-layer) stacking. Exploiting the abundance of charge ion species in the ionic liquid gel electrolyte and pervasive accesses to the graphene platelets via voids, high double-layer specific capacitance of 214Fg(-1) was realized based on cyclic voltammetry data. Impedance studies show a low (0.79cm(2)) charge transfer resistance and a short Warburg range indicating highly diffusive ionic transport capability in the ionic liquid gel electrolyte. The Bode analysis showed high figure of merit for pulse power with 1145ms response time and high-density (27kWkg(-1)) pulsed power capability of the graphene supercapacitor. The charge-discharge data show graphene supercapacitor by availing high (2V) stable potential window in ionic liquid electrolyte gel greatly boosted the energy density to 33.3Whkg(-1) at power density 3kWkg(-1) with minimal decrement to 24.7Whkg(-1) at high 3Ag(-1) discharge current density. By integration with solar cells, direct storage of light-generated electricity and discharge behavior of ionic liquid electrolyte graphene supercapacitor is reported.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据