超级电容器
碳化
壳聚糖
材料科学
电解质
木质素
化学工程
多孔性
电极
离子液体
杂原子
碳纤维
碳化物衍生碳
电化学
储能
纳米技术
复合材料
碳纳米管
复合数
化学
有机化学
碳纳米纤维
催化作用
物理化学
量子力学
工程类
戒指(化学)
扫描电子显微镜
功率(物理)
物理
作者
Mengjin Jiang,W. Xu,Xiaosong Du,Xiaoqin Yang,Fang Wang,Yangbo Zhou,Yu‐Fei Pan,Yi Lu
标识
DOI:10.1016/j.mtsust.2023.100372
摘要
Lignin is a promising candidate for obtaining porous carbon materials for energy storage because it has the highest carbon content compared with the other two main components. While it is the main challenge to realize the high electrochemical performance by controlling the pore structure and improving the conductivity of carbon materials. In the present study, lignin was introduced into a chitosan solution after being chemical activated by degradation liquefaction to form a gel network with the introduction of β-glycerophosphate as a cross-linking agent. In this procedure, the formed gel network provided a basic porous structure for further obtaining highly porous carbon after the following carbonization and activation. In the same procedure, N, P, and O heteroatoms were doped in, which were efficiently preserved in the final derived porous carbon to produce the polar hierarchical porous carbon. The prepared porous carbon under optimized conditions achieved a high specific area of 2107.3 m2/g, with an average pore diameter of 3.63 nm. A high specific capacity of 534.9 F/g at a current density of 1 A/g was obtained. Simultaneously, the coin-type symmetric supercapacitors (with an ionic liquid electrolyte) based on the derived carbon also exhibit an outstanding energy density (58 Wh/kg at 375 W/kg and 11.5 Wh/kg at 4500 W/kg). This work explored an effective strategy for the application of the lignin resource in the field of energy storage materials.
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