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Influence of cathodic overpotential and zincate concentration on zinc deposition in alkaline solution
Hong, Weichen1; Jia, Zhijun2; Wang, Baoguo1
2016-10-01
Source PublicationJOURNAL OF APPLIED ELECTROCHEMISTRY
ISSN0021-891X
Volume46Issue:10Pages:1085-1090
Abstract

Understanding zinc deposition during charging is important for the development of electrically rechargeable zinc-air batteries. For this purpose, the influences of cathodic overpotential and zincate concentration on zinc deposition in 6 M KOH solution were investigated by electrochemical and morphology characterization. When the zincate concentration is lower than 0.1 M, or the cathodic overpotential is more positive than -30 mV, the first charge-transfer reaction (Zn(OH)(2) + e(-) -> Zn(OH) + OH-) tends to be the rate-determining step. The second charge-transfer reaction (Zn(OH) + e(-) -> Zn + OH-) becomes the rate-determining step at zincate concentration higher than 0.2 M and cathodic overpotentials larger than -50 mV. A low zincate concentration and small cathodic overpotential help suppress dendritic zinc deposition. These results will promote the performance of zinc anodes during the charging of zinc-air batteries.

KeywordZinc-air Batteries Zinc Anode Cathodic Overpotential Zincate Concentration Mechanism Of Zinc Deposition
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10800-016-0990-9
Indexed BySCI
Language英语
WOS KeywordELECTROCHEMICAL IMPEDANCE SPECTROSCOPY ; AIR BATTERIES ; BIFUNCTIONAL ELECTROCATALYST ; KINETIC-ANALYSIS ; ZN-AIR ; CELL ; ELECTROLYTES ; DISSOLUTION ; OXIDATION ; COMPOSITE
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
Funding OrganizationNational Natural Science Foundation of China(21276134) ; National 863 Project(2012AA051203)
WOS IDWOS:000382705700008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21451
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Hong, Weichen,Jia, Zhijun,Wang, Baoguo. Influence of cathodic overpotential and zincate concentration on zinc deposition in alkaline solution[J]. JOURNAL OF APPLIED ELECTROCHEMISTRY,2016,46(10):1085-1090.
APA Hong, Weichen,Jia, Zhijun,&Wang, Baoguo.(2016).Influence of cathodic overpotential and zincate concentration on zinc deposition in alkaline solution.JOURNAL OF APPLIED ELECTROCHEMISTRY,46(10),1085-1090.
MLA Hong, Weichen,et al."Influence of cathodic overpotential and zincate concentration on zinc deposition in alkaline solution".JOURNAL OF APPLIED ELECTROCHEMISTRY 46.10(2016):1085-1090.
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