文献类型： 外文期刊
作者： Jiang, Bixia 1 ; Cao, Lin 1 ; Yuan, Qinghua 2 ; Ma, Zhuwen 2 ; Huang, Zhenrui 2 ; Lin, Zhidan 1 ; Zhang, Peng 1 ;
作者机构： 1.Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China
2.Guangdong Acad Agr Sci, Key Lab Crop Genet Improvement Guangdong Prov, Guangdong Prov Engn & Technol Res Ctr Tobacco Bre, Crops Res Inst, Guangzhou 510640, Peoples R China
关键词： porous carbon materials; supercapacitor; tobacco straws; biochar
期刊名称：MATERIALS （ 影响因子：3.748； 五年影响因子：4.042 ）
ISSN：
年卷期： 2022 年 15 卷 3 期
页码：
收录情况： SCI
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 degrees C, the biochar possesses maximum specific surface area (1293.2 m(2)center dot g(-1)) and exhibits high capacitance of 220.7 F center dot g(-1), at 1 A center dot 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 center dot 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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