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Activated Charcoal Modified Graphite Felts Using for Positive Electrodes of Vanadium Redox Flow Battery
Yang, Haitao1; Fan, Chuanlin1; Zhu, Qingshan1,2
2017-11-01
Source PublicationJOURNAL OF ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE
ISSN2381-6872
Volume14Issue:4Pages:041004
Abstract

In the present paper, a composite electrode material was developed for vanadium redox flow batteries (VRFBs). Activated charcoal particles were evenly immobilized on the graphite felt (GF) via a sucrose pyrolysis process for the first time. The in site formed pyrolytic carbon is used as the binder, because it is essentially carbon material as well as GF and activated charcoal, which has a natural tendency to realize good adhesion and low contact resistance. The activated charcoal decorated GF electrode (abbreviated as the composite electrode) possesses larger surface area (13.8 m(2) g(-1)), more than two times as GF (6.3 m(2) g(-1)). The oxygen content of composite electrode is also higher (7.0%) than that of GF (4.8%). The composite electrode was demonstrated to lower polarization and increase the reversibility toward the VO2+/VO(2)(+)redox couple according to the cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements. The charge-discharge cycling test was conducted with a single VRFB cell. The results indicate that the cell with composite electrode presents higher charge-discharge capacity, larger electrolyte utilization efficiency (EU), and higher energy conversion efficiency (79.1%) compared with that using GF electrode. The increasing electrochemical performances of composite electrodes are mainly ascribed to the high electrochemical activity of activated charcoal particles and increasing superficial area.

KeywordVanadium Redox Flow Battery Composite Electrode Material Activated Charcoal Particles Pyrolytic Carbon Reversibility
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1115/1.4037532
Indexed BySCI
Language英语
WOS KeywordCOMPOSITE ELECTRODES ; ELECTROCHEMICAL-BEHAVIOR ; CARBON NANOTUBE ; CELL ; PERFORMANCE ; VO2+/VO2+ ; IMPEDANCE ; GRAPHENE ; CATALYST ; HYBRID
WOS Research AreaElectrochemistry ; Energy & Fuels
WOS SubjectElectrochemistry ; Energy & Fuels
Funding OrganizationNational Natural Science Foundation of China(51504231 ; Open Project of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization(CNMRCUKF1704) ; 51504232 ; 21325628)
WOS IDWOS:000415121300004
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23408
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yang, Haitao,Fan, Chuanlin,Zhu, Qingshan. Activated Charcoal Modified Graphite Felts Using for Positive Electrodes of Vanadium Redox Flow Battery[J]. JOURNAL OF ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE,2017,14(4):041004.
APA Yang, Haitao,Fan, Chuanlin,&Zhu, Qingshan.(2017).Activated Charcoal Modified Graphite Felts Using for Positive Electrodes of Vanadium Redox Flow Battery.JOURNAL OF ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE,14(4),041004.
MLA Yang, Haitao,et al."Activated Charcoal Modified Graphite Felts Using for Positive Electrodes of Vanadium Redox Flow Battery".JOURNAL OF ELECTROCHEMICAL ENERGY CONVERSION AND STORAGE 14.4(2017):041004.
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