材料科学
电容
超级电容器
循环伏安法
碳纤维
活性炭
电解质
电容器
介电谱
电化学
比表面积
化学工程
功率密度
碳纳米管
电容感应
纳米技术
吸附
电极
复合材料
化学
有机化学
电气工程
功率(物理)
复合数
电压
催化作用
物理化学
工程类
物理
量子力学
作者
Xin Geng,Lixiang Li,Feng Li
标识
DOI:10.1016/j.electacta.2015.03.220
摘要
A hybrid carbon materials with three dimensional network carbon nanotubes in activated carbon was prepared by an in situ activation process. This hybrid carbon material has ultrahigh specific surface area (2879 m2/g), pore volume (1.36 cm3/g) and developed small mesopore network, which is very favorable for fast electrolyte ion transport in the porous channel. As evidenced by N2 adsorption, cyclic voltammetry and electrochemical impedance measurements, the hybrid carbon material shows superior capacitive behaviors (exhibiting a high capacitance of 140 F/g, better capacitance retention ratio of 80% even at very high sweep rate of 200 mV/s) and provides much higher power density while still maintaining good energy density. This hybrid carbon material offers a great potential in electrochemical capacitors, particularly for applications where high power output and good high-frequency capacitive performances are required.
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