超级电容器
杂原子
三元运算
材料科学
电解质
微型多孔材料
比表面积
碳纤维
化学工程
功率密度
化学
电化学
复合材料
有机化学
电极
复合数
物理化学
催化作用
计算机科学
程序设计语言
戒指(化学)
功率(物理)
工程类
物理
量子力学
作者
He Wang,Shumeng Wu,Bingbing Fan,Xiaoqiang Liu,Yamin Nie,Yanmei Zhou
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2021-11-01
卷期号:168 (11): 110535-110535
被引量:4
标识
DOI:10.1149/1945-7111/ac377d
摘要
Engineering large active surface area, fast ion transfer, and wide work voltage are indispensable for using porous carbon as an electrode material for high energy density and high rate capability supercapacitors. Here, a method is proposed to fabricate N/O/P/S heteroatom co-doped hierarchical porous carbon materials via zinc carbonate hydroxide ([ZnCO 3 ] 2 ∙[Zn(OH) 2 ] 3 ) assisted activation of the biomass-based ternary complex. By adjusting the pH of the ternary complex and the mass ratio of [ZnCO 3 ] 2 ∙[Zn(OH) 2 ] 3 , it is demonstrated that TCPC-7-0.5 with high specific surface area (1360 m 2 g −1 ), appropriate micropore surface area (672 m 2 g −1 ), and micropore volume (0.3 cm 3 g −1 ) possesses excellent electrochemical performance. The unique pore structure accelerates the transport of electrolyte ions and provides more effective active sites for their adsorption. As a result, as an electrode material for supercapacitors, it maintains excellent frequency response at a larger scan rate of 1 V s −1 . The working voltage range of the assembled symmetrical supercapacitor TCPC-7-0.5//TCPC-7-0.5 in 6 M KOH electrolyte can be effectively expanded to 1.2 V. Most importantly, it can simultaneously achieve an energy density of 7.01 W h kg −1 at a high-power density of 15 kW kg −1 .
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