荞麦芯衍生的富氮和富氧可控多孔碳用于高性能超级电容器
Buckwheat core derived nitrogen- and oxygen-rich controlled porous carbon for high-performance supercapacitors
欧俊科 1张宏伟 2雷英 3李开阳 2李博 2邓海鑫 2王昊 2邹亮4
作者信息
- 1. School of Mechanical Engineering,Chengdu University,Chengdu 610106,China;Institute for Advanced Study,Chengdu University,Chengdu 610106,China
- 2. School of Mechanical Engineering,Chengdu University,Chengdu 610106,China
- 3. Materials Corrosion and Protection Key Laboratory of Sichuan Province,Sichuan University of Science and Engineering,Zigong 643000,China
- 4. Key Laboratory of Coarse Cereal Processing of Ministry of Agriculture and Rural Affairs(Chengdu University),Chengdu 610106,China
- 折叠
摘要
以荞麦芯为前驱体,通过一种简单有效的一步活化方法制备分层多孔碳.制备得到的多孔碳具有高比表面积(805.91 m2/g)和高孔隙体积(0.60 cm3/g).在三电极体系下,以0.5 A/g电流密度充放电,多孔碳在6 mol/L KOH中提供了330 F/g的超高电容.特别是当电流密度增加到100 A/g时,其电容仍可达到140 F/g.此外,在双电极系统中,其多孔碳构建的对称电容器在6 mol/L KOH电解液中可提供6.1 W·h/kg的输出.因此,这项研究为超级电容器电极材料提供了一条简单低成本的制备方法.
Abstract
We propose a simple and effective one-step activation route to prepare a hierarchically porous carbon with buckwheat core acting for precursor. The as-obtained porous carbon (BCPC-3) shows high specific surface area (805.91 m2 /g) and high pore volume (0.60 cm3/g). As a supercapacitor electrode material for three-electrode, porous carbon delivers an ultrahigh capacitance of 330 F/g (at 0.5 A/g) in 6 mol/L KOH. In particular, it displays a capacitance of 140 F/g even when the current density increases to 100 A/g. In addition, in the two-electrode system, a symmetric supercapacitor based on buckwheat core with a controlled carbon structure can provide an output of 6.1 W·h/kg in a 6 mol/L KOH electrolyte. Therefore, this research offers a straightforward and cost-effective pathway for the fabrication of superior supercapacitor electrode materials.
关键词
荞麦芯/多孔碳/超级电容器Key words
buckwheat core/porous carbon/supercapacitor引用本文复制引用
基金项目
Chengdu University Startup Funding,China(2081919032)
Opening Project of Key Laboratory of Coarse Cereal Processing of Ministry of Agriculture and Rural Affairs,China(2020CC011)
出版年
2023
NETL
NSTL
维普
万方数据