碳化
材料科学
超级电容器
生物炭
稻草
多孔性
比表面积
生物量(生态学)
球磨机
碳纤维
化学工程
环境污染
制浆造纸工业
电化学
废物管理
复合材料
热解
环境科学
电极
化学
催化作用
扫描电子显微镜
有机化学
农学
无机化学
复合数
环境保护
生物
物理化学
工程类
作者
Bixia Jiang,Lin Cao,Qinghua Yuan,Zhuwen Ma,Zhenrui Huang,Zhidan Lin,Peng Zhang
出处
期刊:Materials
[MDPI AG]
日期:2022-01-25
卷期号:15 (3): 924-924
被引量:13
摘要
A large amount of biomass straw waste is generated every year in the world, which can cause serious environmental pollution and resource waste if disposed of improperly. At present, biomass-derived porous carbon materials prepared from biomass waste as a carbon source have garnered attention due to their renewability, huge reserves, low cost, and environmental benevolence. In this work, high-performance carbon materials were prepared via a one-step carbonization-activation method and ball milling, with waste tobacco straw as precursor and nano-ZnO as template and activator. The specific surface area and porous structure of biomass-derived carbon could be controlled by carbonization temperature, which is closely related to the electrochemical performances of the carbon material. It was found that, when the carbonization temperature was 800 °C, the biochar possesses maximum specific surface area (1293.2 m2·g-1) and exhibits high capacitance of 220.7 F·g-1, at 1 A·g-1 current density in a three-electrode configuration with 6 M KOH aqueous solution. The capacitance retention maintained about 94.83% at 5 A·g-1 after 3000 cycles. This work proves the porous biochar derived from tobacco straws has a great potential prospect in the field of supercapacitors.
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