Waste activated carbon transformed to electrode of supercapacitor through combining with Co(OH)(2)

doi:10.1016/j.electacta.2020.137475

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Waste activated carbon transformed to electrode of supercapacitor through combining with Co(OH)(2)
	Xu, Cheng; Chen, Yong; Ma, Yannan; Huang, Jiandi; Zhao, Jiang; Xu, Hui
刊名	ELECTROCHIMICA ACTA
	2021-01-20
卷号	367 页码:-
关键词	METHYLENE-BLUE DYE HIGH-PERFORMANCE COBALT HYDROXIDE GRAPHENE OXIDE ASYMMETRIC SUPERCAPACITORS FACILE SYNTHESIS DOPED GRAPHENE ORGANIC-DYES NI-FOAM ADSORPTION
ISSN号	0013-4686
DOI	10.1016/j.electacta.2020.137475
英文摘要	Activated carbon (AC) is a multifunctional material. On the one hand, it is used as adsorbent to remove pollutants in wastewater, on the other hand, it is a preferred electrode for supercapacitors. Herein, we fabricate a hybrid electrode based on Co(OH)(2) and waste AC which is supposed to discard after removing methylene blue (MB) from water. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy demonstrate AC/MB/Co(OH)(2) nanocomposites are successfully synthesized via precipitation method. Furthermore, the specific surface area of AC/MB/Co(OH)(2) is dramatically improved compared to Co(OH)(2). Cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectrum (EIS) tests suggest that the specific capacity of AC/MB/Co(OH)(2) is 447 C g(-1) at a current density of 1 A g(-1) in 3M KOH, which is higher than that of Co(OH)(2) (329 C g(-1)) or AC/Co(OH)(2) (347 C g(-1)). The result indicates that MB adsorbed on AC can provide pseudo-capacity for the hybrid electrode. The assembled asymmetric supercapacitor has a power density of 400 W kg(-1) at an energy density of 18 Wh kg(-1) and can power a light emitting diodes (LED) easily. Thus, this strategy makes it possible to further use waste AC as the electrode of supercapacitor, which avoids secondary pollution that comes from the adsorbents. (C) 2020 Elsevier Ltd. All rights reserved.
WOS研究方向	Electrochemistry
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000607621100004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147333]
专题	石油化工学院
作者单位	Lanzhou Univ Technol, Coll Petrochem Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Xu, Cheng,Chen, Yong,Ma, Yannan,et al. Waste activated carbon transformed to electrode of supercapacitor through combining with Co(OH)(2)[J]. ELECTROCHIMICA ACTA,2021,367:-.
APA	Xu, Cheng,Chen, Yong,Ma, Yannan,Huang, Jiandi,Zhao, Jiang,&Xu, Hui.(2021).Waste activated carbon transformed to electrode of supercapacitor through combining with Co(OH)(2).ELECTROCHIMICA ACTA,367,-.
MLA	Xu, Cheng,et al."Waste activated carbon transformed to electrode of supercapacitor through combining with Co(OH)(2)".ELECTROCHIMICA ACTA 367(2021):-.