具有高比电容的蘑菇衍生碳材料

doi:10.11896/cldb.19060119

材料导报

2020, Vol. 34

Issue (12): 12010-12014 https://doi.org/10.11896/cldb.19060119

无机非金属及其复合材料

具有高比电容的蘑菇衍生碳材料

张文林^1,2, 冉奋^1,2

1 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州 730050
2 兰州理工大学材料科学与工程学院,兰州 730050

Mushroom Derived Carbon Material with High Specific Capacitance

ZHANG Wenlin^1,2, RAN Fen^1,2

1 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
2 School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China

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摘要以三种不同种类的蘑菇为前驱体,经过高温热处理和氢氧化钾(KOH)活化,制备生物质炭;将制备的碳材料作为电化学活性物质,应用于电极并组装超级电容器器件。扫描电子显微镜(SEM)表征结果表明,蘑菇碳为不规则的块状结构,改性后的碳材料表面出现明显刻蚀及孔结构,氮气吸脱附曲线及孔径分布进一步说明活化后其比表面积和孔隙率发生显著变化。通过循环伏安(CV)、恒流充放电(GCD)和电化学阻抗谱(EIS)对其电化学性能进行测试,结果表明,三种碳材料在6 mol/L 氢氧化钾电解液中均展现出优异的电化学性能。以杏鲍菇为前驱体制备的碳材料在电流密度为0.5 A/g时比电容高达427 F/g,其组装的对称器件在功率密度为150 W/kg时,能量密度可达7.8 Wh/kg。

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关键词: 生物质炭氢氧化钾活化超级电容器

Abstract: In this paper, the carbon materials were prepared by high temperature heat treatment and KOH activation with three different kinds of mushrooms as precursors, the prepared carbon materials were used as electrochemical active substances and further used as electrodes and assemble supercapacitors. The results of scanning electron microscope (SEM) showed that the structure of the mushroom carbon was bulk, and a large number of pore structures appeared on the surface after modification. Nitrogen adsorption and desorption curves and the pore size distribution further indicated the significant changes of specific surface area and the porosity. The electrochemical performances of the materials were analyzed by cyclic voltammograms (CV), galvanostatic charge-discharge (GCD) and the electrochemical impedance spectroscopy (EIS) in 6 mol/L KOH electrolyte solution. All three carbon materials exhibited excellent electrochemical performance. The capacitance of the carbon material derived from pleurotus eryngii up to 427 F/g at the current density of 0.5 A/g. In addition, at a power density of 150 W/kg, the supercapacitor device delivers a high energy density of 7.8 Wh/kg.

Key words: biochar potassium hydroxide activation supercapacitor

发布日期: 2020-05-29

ZTFLH:	TB324
	TQ316.3

基金资助: 国家自然科学基金(51203071;51763014);兰州理工大学红柳杰出青年;沈阳材料科学国家实验室-兰州理工大学有色金属先进加工与再利用省部共建国家实验室联合基金(18LHPY002)

通讯作者: ranfen@163.com

作者简介: 张文林,硕士研究生,师承冉奋教授,主要从事超级电容器电极材料的研究。
冉奋,教授/博导, 甘肃省“飞天学者”青年学者。四川大学高分子材料工程国家重点实验室博士, 新加坡国立大学、美国加州大学圣克鲁斯分校、美国加州大学圣巴巴拉分校访问学者。担任《电子元件与材料》编委、中国生物材料学会血液净化材料分会委员。主要从事高分子能源材料和生物医用高分子的研究。

引用本文:

张文林, 冉奋. 具有高比电容的蘑菇衍生碳材料[J]. 材料导报, 2020, 34(12): 12010-12014.
ZHANG Wenlin, RAN Fen. Mushroom Derived Carbon Material with High Specific Capacitance. Materials Reports, 2020, 34(12): 12010-12014.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.19060119 或 http://www.mater-rep.com/CN/Y2020/V34/I12/12010

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