Creating a new electrode material of supercapacitors from the waste multi-walled carbon nanotubes

doi:10.1016/j.electacta.2019.135237

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	Creating a new electrode material of supercapacitors from the waste multi-walled carbon nanotubes
	Chen, Yong; Xu, Cheng; Zhao, Jiang; Huang, Jiandi; Xu, Hui; Gou, Guojun
刊名	ELECTROCHIMICA ACTA
	2020-01-10
卷号	330
关键词	Adsorption Waste MWCNTs MWCNTs/MB/PPy composites Specific capacitance Symmetric supercapacitor
ISSN号	0013-4686
DOI	10.1016/j.electacta.2019.135237
英文摘要	Many adsorbents are discarded after removing pollutants, which always re-contaminateenvironment due to a release of pollutants again. The purpose of this study is to reuse the waste multi-walled carbon nanotubes (MWCNTs) who remove methylene blue (MB) from waste water as electrode material of supercapacitor. Herein, with a combination of polypyrrole (PPy), MWCNTs/MB/PPy composites are synthesized via chemical in-situ polymerization. The structure tests of the composites indicate that the surface property of MWCNTs, after adsorbing MB, is changed from hydrophobic to hydrophilic. Additionally, cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectrum (EIS) tests in three-electrode system demonstrate that at a current density of 5 mA cm(-2), the specific capacitance of MWCNTs/MB/PPy composites is 446 F g(-1). This result is higher than that of PPy and MWCNTs/PPy composites due to an extra pseudo-capacitance provided by MB. Moreover, a symmetric supercapacitor of MWCNTs/MB/PPy composites is assembled to successfully light a light emitting diodes (LED), which powerfully reveals the potential application of MWCNTs/MB/PPy composites. Obviously, the waste MWCNTs can be reused, meaning the dyes adsorbed on MWCNTs have no chance to pollute the environment again. (C) 2019 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundations of China[51663014][51503092][51763015] ; Natural Science Foundation of Gansu Province[2017GS10857]
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000501468400018
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/64235]
专题	石油化工学院
通讯作者	Chen, Yong; Xu, Hui
作者单位	Lanzhou Univ Technol, Coll Petrochem Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yong,Xu, Cheng,Zhao, Jiang,et al. Creating a new electrode material of supercapacitors from the waste multi-walled carbon nanotubes[J]. ELECTROCHIMICA ACTA,2020,330.
APA	Chen, Yong,Xu, Cheng,Zhao, Jiang,Huang, Jiandi,Xu, Hui,&Gou, Guojun.(2020).Creating a new electrode material of supercapacitors from the waste multi-walled carbon nanotubes.ELECTROCHIMICA ACTA,330.
MLA	Chen, Yong,et al."Creating a new electrode material of supercapacitors from the waste multi-walled carbon nanotubes".ELECTROCHIMICA ACTA 330(2020).