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N, S-Codoped Activated Carbon Material with Ultra-High Surface Area for High-Performance Supercapacitors

文献类型： 外文期刊

作者： Yuan, Qinghua 1 ; Ma, Zhuwen 1 ; Chen, Junbiao 1 ; Huang, Zhenrui 1 ; Fang, Zeming 2 ; Zhang, Peng 2 ; Lin, Zhidan 2 ; Cu 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Guangdong Prov Engn & Technol Res Ctr Tobacco Bre, Crops Res Inst, Guangzhou 510640, Peoples R China

2.Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Peoples R China

3.South China Univ Technol, Analyt & Testing Ctr, Guangzhou 510640, Peoples R China

关键词： supercapacitor; carbon material; hetero atom doping; activated carbon; biochar; tobacco

期刊名称：POLYMERS （ 影响因子：4.329； 五年影响因子：4.493 ）

ISSN：

年卷期： 2020 年 12 卷 9 期

页码：

收录情况： SCI

摘要： The recycling of macromolecular biowastes has been a problem for the agriculture industry. In this study, a novel N, S-codoped activated carbon material with an ultrahigh specific area was produced for the application of a supercapacitor electrode, using tobacco stalk biowastes as the carbon source, KOH as the activating agents and thiourea as the doping agent. Tobacco stalk is mainly composed of cellulose, but also contains many small molecules and inorganic salts. KOH activation resulted in many mesopores, giving the tobacco stem-activated carbon a large specific surface area and double-layer capacitance. The specific surface area of the samples reached up to 3733 m(2)center dot g(-1), while the maximum specific capacitance of the samples obtained was up to 281.3 F center dot g(-1) in the 3-electrode tests (1 A center dot g(-1)). The doping of N and S elements raised the specific capacitance significantly, which could be increased to a value as high as 422.5 F center dot g(-1) at a current density of 1 A center dot g(-1) in the 3-electrode tests, but N, S-codoping also led to instability. The results of this article prove that tobacco stalks could be efficiently reused in the field of supercapacitors.

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