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Bio-carbon composite for supercapacitor electrodes: Harnessing hydrochar frameworks and bio-tar polymerization

文献类型： 外文期刊

作者： Jia, Jixiu 1 ; Sun, Yuxuan 1 ; Huo, Lili 1 ; Zhao, Lixin 1 ; Liu, Ziyun 1 ; Liu, Zhidan 2 ; Kang, Kang 3 ; Zhang, Shuaishuai 1 ; Xie, Teng 1 ; Zhao, Yanan 1 ; Yao, Zonglu 1 ;

作者机构： 1.CAAS, Minist Agr & Rural Affairs PR China, Inst Environm & Sustainable Dev Agr, Key Lab Low Carbon Green Agr North China, Beijing 100081, Peoples R China

2.China Agr Univ, Minist Coll Water Resources & Civil Engn, Lab Environm Enhancing Energy E2E, Key Lab Agr Engn Struct & Environm, Beijing 100083, Peoples R China

3.Lakehead Univ, Biorefining Res Inst BRI, Thunder Bay, ON P7B 5E1, Canada

4.Lakehead Univ, Dept Chem Engn, Thunder Bay, ON P7B 5E1, Canada

关键词： Hydrochar; Bio-tar; Bio-carbon composite; Porous bio-carbon; Supercapacitor electrode

期刊名称：FUEL PROCESSING TECHNOLOGY （ 影响因子：7.7； 五年影响因子：7.1 ）

ISSN： 0378-3820

年卷期： 2025 年 269 卷

页码：

收录情况： SCI

摘要： Bio-tar, a promising renewable carbon precursor, has garnered significant attention for its potential in super- capacitor electrode applications. However, the polymerization of bio-tar into carbon presents challenges, particularly in achieving a dense, interconnected pore structure essential for optimal electrochemical performance. This study introduced an innovative approach using hydrochar as a framework combined with bio-tar as the carbon source to synthesize bio-carbon composite. The results showed that the prepared bio-carbon exhibited a stable morphological structure in which the hydrochar skeleton supported the wrapping of bio-tar originated carbon, specifically at a hydrochar to bio-tar ratio of 1:6. And it also showed a maximum specific surface area of 2714.27 m2/g, with a mesopore ratio of 68.79 % at an activation temperature of 800 degrees C. The optimal electrochemical properties were observed at the highest specific capacitance of 340.4 F/g in a three-electrode system under a current density of 0.5 A/g. When assembled into a supercapacitor, the single-pole specific capacitance reached 213.3 F/g at 0.5 A/g. The structure-property relationship suggested that the water contact angle is a key factor influencing the specific capacitance, particularly at high specific surface areas. This study demonstrated an innovative way to prepare sustainable composite bio-carbon material with excellent electrochemical performance.

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