基于二维纳米碳电极的离子液体基超级电容器

Ionic Liquid-based Supercapacitors Based on 2D Nanocarbon Electrodes

离子液体基超级电容器由于具有宽电压窗口、高能量密度而被广泛关注。二维碳基材料具有大比表面积、短离子传输距离被认为是最理想的超级电容器电极材料。阐述了3种二维碳基材料为电极,分别是多孔互通的功能化石墨烯、多孔碳纳米片、类石墨烯氮掺杂碳纳米片,分别匹配了不同的离子液体为电解液,所组装的超级电容器呈现出高能量-高功率与高循环稳定性协同输出。实现了超级电容器桥接商用二次电池和电解电容器之间的能量-功率带。

Ionic liquid-based supercapacitors with wider voltage windows and high energy densities are widely noted. 2D carbon-based nanomaterials with high specific surface areas and short ionic transport distance are regarded as the idea supercapacitor electrode materials.This paper summarized three kinds of 2D carbon-based materials, such as interconnected porous functionalized graphenes, porous carbon nanosheets and grahene-like nitrogen-doped carbon nanosheets, which match different ionic liquid electrolytes.These supercapacitors exhibit high specific capacitance, excellent rate capacity, long cyclic life as well as high energy density and high power density synergetic outputting properties, which can bridge the energy-power gap between electrolytic capacitors and commercial batteries.