State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P.R. China.
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P.R. China.
Bioresour Technol. 2015 Aug;189:285-291. doi: 10.1016/j.biortech.2015.04.005. Epub 2015 Apr 4.
In this report, corncob residue, the main by-product in the furfural industry, is used as a precursor to prepare porous carbon by a simple and direct thermal treatment: one-step activation without pre-carbonization. As a consequence, the corncob residue derived porous carbon achieves a high surface area of 1210 m(2) g(-1) after ash-removal. The carbon material has the advantages of low cost and low environmental impact, with a superior electrochemical performance compared to those polymer-based synthetic carbons as electrode material for a supercapacitor. The carbon electrode exhibits a high capacitance of 314 F g(-1) in 6M KOH electrolyte. The corresponding sample also shows a superb cycling stability. Almost no capacitance decay was observed after 100,000 cycles. The excellent electrochemical performance is due to the combination of a high specific surface area with a fraction of mesopores and highly stable structure.
在本报告中，以糠醛工业的主要副产物玉米芯废渣为前驱体，通过简单直接的热处理（无需预碳化的一步活化法）制备多孔炭。经灰分去除处理后，玉米芯废渣衍生的多孔炭的比表面积高达 1210 m(2) g(-1)。该碳材料具有成本低、环境影响小的优点，作为超级电容器的电极材料，其电化学性能优于基于聚合物的合成碳。作为电极材料，该碳电极在 6M KOH 电解质中表现出 314 F g(-1) 的高电容。相应的样品还表现出极好的循环稳定性。经过 100000 次循环后，几乎没有电容衰减。优异的电化学性能归因于高比表面积与中孔部分以及高度稳定结构的结合。
