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A novel composite hard carbon from waste Camellia oleifera shell modified by phenol-formaldehyde resin for supercapacitor electrode with high specific capacitance

文献类型： 外文期刊

作者： Guan, Mingjie 1 ; Wang, Guannan 1 ; Yong, Cheng 3 ; Zhu, Yan 1 ; Li, Yujia 1 ; Zhu, Dianyu 1 ; Jia, Qingdi 1 ;

作者机构： 1.Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China

2.Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing, Jiangsu, Peoples R China

4.Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing, Jiangsu, Peoples R China

关键词： Camellia oleifera shell; Agriculture waste; Phenol-formaldehyde resin; Biochar; Hard carbon; Electrochemistry

期刊名称：DIAMOND AND RELATED MATERIALS （ 影响因子：4.1； 五年影响因子：3.6 ）

ISSN： 0925-9635

年卷期： 2023 年 138 卷

页码：

收录情况： SCI

摘要： The lower specific capacitance of biochar electrode material limits its practical application. Therefore, this study attempts to develop a novel supercapacitor biochar electrode material with high specific capacitance from waste camellia oleifera shell (COS). COS shell powder was pre-impregnated with phenol-formaldehyde (PF) resin then carbonization-KOH activation. An orthogonal experiment (L9(33)) was designed to explore the influence of mass mixing ratio of PF/COS, activation time, and temperature on the electrochemical property of COS-based biochar. The optimal process parameters were: 800 degrees C, 1 h and mass mixing ratio of 5:1. Compared with c. oleifera shellactivated carbon (COS-AC) and phenol-formaldehyde-activated carbon (PF-AC) controls, the phenolformaldehyde modified c. oleifera shell-activated carbon (PMC-AC) exhibited micro-morphology of carbon microspheres and a three-dimensional network pore. The internal orientation of PMC-AC tended to be disordered, and had a superior specific surface area of 3037.68 m2 g1 and total pore volume of 1.7 cm3 g1. Electrochemical tests used PMC-AC as the negative electrode, with high specific capacitance (375.9 F g � 1 at 0.5 A g � 1), good rate property (49.3 % of capacitance retention at 0.5-10 A g � 1), and charging/discharging stability. It is supposed that it was a convenient and feasible way to modify biochar into high-quality hard carbon for supercapacitors.

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