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Preparation and Electrochemical Properties of High Purity Mixed-Acid Electrolytes for High Energy Density Vanadium Redox Flow Battery
Fan, Chuanlin1; Yang, Haitao1; Zhu, Qingshan1,2
2017-08-01
Source PublicationINTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
ISSN1452-3981
Volume12Issue:8Pages:7728-7738
Abstract

All-vanadium redox flow battery (VRFB) is a large-scale electrochemical energy storage technology with numerous potential applications because of its inherent safety and long service life. In previous years, a novel mixed-acid electrolyte system, vanadium electrolytes with mixture of sulfuric acid and hydrochloric acid, has been developed by the Pacific Northwest National Laboratory (PNNL) to increase vanadium solubility, which can effectively raise the electrolyte energy density from 25 Wh/L to 40 Wh/L. To further improve mixed-acid VRFBs, in present work, high purity mixed-acid electrolytes were prepared using a novel direct dissolution - electrochemical reduction process from high purity vanadium oxytrichloride (VOCl3). And the purity and electrochemical properties were investigated, comparing with common mixed-acid electrolytes and regular sulfate electrolytes prepared from metallurgical grade vanadium pentoxide. It was found that the novel process demonstrated a great potential for the low cost and high efficiency production of high purity electrolytes with excellent electrochemical properties for mixed-acid VRFBs. Comparing the traditional high purity electrolytes preparation process, the present novel method will dramatically cut the cost by more than 90 percent, which will considerably facilitate the commercial application of high performance and high density VRFBs.

KeywordAll-vanadium Redox Flow Battery Electrochemical Property High Purity Mixed-acid Vanadium Electrolyte Vanadium Oxytrichloride
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.20964/2017.08.57
Indexed BySCI
Language英语
WOS KeywordPerformance ; Storage ; Ions
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
Funding OrganizationNational Natural Science Foundation of China(51504232 ; 51504231 ; 21325628)
WOS IDWOS:000408476400065
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23264
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
Fan, Chuanlin,Yang, Haitao,Zhu, Qingshan. Preparation and Electrochemical Properties of High Purity Mixed-Acid Electrolytes for High Energy Density Vanadium Redox Flow Battery[J]. INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,2017,12(8):7728-7738.
APA Fan, Chuanlin,Yang, Haitao,&Zhu, Qingshan.(2017).Preparation and Electrochemical Properties of High Purity Mixed-Acid Electrolytes for High Energy Density Vanadium Redox Flow Battery.INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,12(8),7728-7738.
MLA Fan, Chuanlin,et al."Preparation and Electrochemical Properties of High Purity Mixed-Acid Electrolytes for High Energy Density Vanadium Redox Flow Battery".INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE 12.8(2017):7728-7738.
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