期刊
CARBON
卷 174, 期 -, 页码 463-474出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.12.052
关键词
Biomass-derived carbon; Prosopis juliflora; Hierarchical porous carbon; 3D carbon nanosheet; Symmetric supercapacitors
资金
- BK21 plus, Creative Human Resource Education and Research programs for ICT convergence in the 4th Industrial Revolution, Pusan National University, Busan, South Korea
An ultra-high specific surface area and abundant pore volume activated carbon nanosheets were prepared from Prosopis Juliflora wood carbon waste blocks, showing excellent electrochemical performance and superior energy density for energy storage applications. The enhancement of electrochemical performance is attributed to graphitization, surface functional groups, surface area, and pore structure/volume.
A simple one step activation method is used to achieve an ultra-high specific surface area of 2943 m(2) g(-1), and abundant pore volume of 1.83 cm(3) g(-1) with a rational micro/meso/macro pore size distributed activated carbon nanosheets from Prosopis Juliflora wood carbon waste blocks. A superior electrochemical performance has been achieved with a specific capacitance of 588 F g(-1) at 0.5 A g(-1) with an excellent stability (retention 92.5% after 6000 cycles) in 6 M KOH electrolyte for a three-electrode approach. The assembled symmetric supercapacitor device outperformed in a neutral aqueous electrolyte compared to an alkaline electrolyte, such as with a gravimetric capacitance of 403 and 426 F g(-1) and superior energy density of 32.9 W h kg(-1) (at 172.7 W kg(-1)) and 56.7 W h kg(-1) (at 248.8 W kg(-1)), and a large electrochemical window of 0-1.4 V in 6 M KOH and 0-2 V in 1 M Na2SO4 electrolyte, respectively. The electrochemical performance has been enhanced by the degree of graphitization, surface functional groups, surface area and pore structure/volume. This work provides a trustworthy approach to produce higher energy density devices from renewable biomass carbon wastes for various energy storage applications. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据