超级电容器
离子液体
微型多孔材料
材料科学
电解质
碳纤维
电容
化学工程
四氟硼酸盐
电极
纳米技术
化学
有机化学
复合材料
物理化学
复合数
工程类
催化作用
作者
Yaqiong Li,Zihao Wei,Ziheng Zhan,Jiajing Pei,Chaofeng Zhao,Wenquan Xu,Qi Sun,Wenxing Chen,Shenghua Li,Siping Pang
标识
DOI:10.1016/j.est.2023.109778
摘要
Ionic liquids are commonly employed as supercapacitor electrolytes owing to their wide voltage windows. However, ion transport in a carbon electrode is limited by the larger viscosity and larger ion size of an ionic liquid, which reduces the energy density of supercapacitors. In this work, we fabricated macro-microporous nitrogen-doped carbon aerogels (H-A-C-N) as electrode materials by scale-up biomass strategy for high-energy-density supercapacitors. The macroporous structure ensures the rapid transport of ions in the ionic liquid, particularly under high-current charging and discharging conditions. We fabricated a symmetric supercapacitor using the H-A-C-N as the electrode and 1-ethyl-3-methylimidazolium tetrafluoroborate ([Emim]BF4) as the electrolyte. The developed supercapacitor presents an energy density of 68.8 Wh kg−1. The results of this study present considerable potential for the preparation of high-performance electrode materials in future studies.
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