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Effects of lithium bis(oxalato)borate on electrochemical stability of [Emim][Al2Cl7] ionic liquid for aluminum electrolysis
Lang, Haiyan; Zhang, Junling; Kang, Yanhong; Chen, Shimou; Zhang, Suojiang
2017-04-01
Source PublicationIONICS
ISSN0947-7047
Volume23Issue:4Pages:959-966
Abstract

Electrodeposition of aluminum from ionic liquids has been considered a promising approach to low-temperature aluminum electrolysis. In this study, we first investigated the electrochemical stability of 1-ethyl-3-methylimidazolium chloride ([Emim][Al2Cl7]) electrolyte, which is a typically used electrolyte for aluminum electrodeposition. It was found that part of imidazole ions decomposed on the cathode during the electrolysis process, especially when the temperature was at or over 353 K. In order to enhance the stability of the electrolyte, we further studied the effects of lithium salt and lithium bis(oxalato)borate (LiBOB), on the electrochemical stability of the [Emim][Al2Cl7] ionic liquid system. It was found that the electrochemical window of the electrolyte was broadened from 2.59 to 2.74 V at 373 K by addition of 1 mol% LiBOB. With the existence of LiBOB, the reduction current density of Al2Cl7- increased before -0.58 V and the electrodissolution of Al was more complete. The possible mechanism on the LiBOB increases the stability of the electrolyte systems also discussed based on our theoretical calculations.

KeywordIonic Liquids Aluminum Electrolysis Additive Electrochemical Stability
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11581-016-1889-5
Indexed BySCI
Language英语
WOS KeywordChloride Molten-salt ; Low-temperature ; Ternary Alloys ; Electrodeposition ; Al ; Additives ; Deposition ; Baths ; Nicotinate ; Batteries
WOS Research AreaChemistry ; Electrochemistry ; Physics
WOS SubjectChemistry, Physical ; Electrochemistry ; Physics, Condensed Matter
Funding Organization973 Project of China(2015CB251401) ; National Nature Science Foundations of China(21276257 ; 91534109 ; 91434203)
WOS IDWOS:000399829200017
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/22848
Collection多相复杂系统国家重点实验室
AffiliationChinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc,State Key, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Lang, Haiyan,Zhang, Junling,Kang, Yanhong,et al. Effects of lithium bis(oxalato)borate on electrochemical stability of [Emim][Al2Cl7] ionic liquid for aluminum electrolysis[J]. IONICS,2017,23(4):959-966.
APA Lang, Haiyan,Zhang, Junling,Kang, Yanhong,Chen, Shimou,&Zhang, Suojiang.(2017).Effects of lithium bis(oxalato)borate on electrochemical stability of [Emim][Al2Cl7] ionic liquid for aluminum electrolysis.IONICS,23(4),959-966.
MLA Lang, Haiyan,et al."Effects of lithium bis(oxalato)borate on electrochemical stability of [Emim][Al2Cl7] ionic liquid for aluminum electrolysis".IONICS 23.4(2017):959-966.
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