超级电容器
介孔材料
比表面积
碳化
材料科学
活性炭
电容
电解质
生物量(生态学)
化学工程
功率密度
碳纤维
比能量
竹子
储能
电化学
电极
水溶液
复合材料
吸附
化学
复合数
催化作用
有机化学
扫描电子显微镜
物理化学
工程类
功率(物理)
海洋学
物理
量子力学
地质学
作者
Guoxiong Zhang,Yuemei Chen,Yigang Chen,Haibo Guo
标识
DOI:10.1016/j.materresbull.2018.03.006
摘要
Activated biomass carbons (ABC) produced from bamboo by carbonization and activation have high specific surface areas and mesoporous structures. The specific surface area, total pore volume, and average pore size of the activated biomass carbon are controlled by adjusting the activation temperature from 700 to 1000 °C. The carbon materials activated at 900 °C have an optimal mesoporous structure with a high specific surface area (2221.1 m2 g−1), the highest capacitance (293 F g−1 at 0.5 A g−1 in 3 M KOH aqueous electrolyte) and excellent rate capability (193.8 F g−1 at 20 A g−1). Symmetric supercapacitors made of the optimal electrodes exhibit a high energy density of 10.9 Wh kg−1 (18.2 Wh L−1) at a power density of 63 W kg−1 (105 W L−1) and outstanding capacitance retention of 91.8% over 10,000 cycles. The high electrochemical performance of the mesoporous ABCs show that they are highly promising for energy-storage applications with further optimization.
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