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Electrochemical Properties of 1,3-Dimethylimidazolium Dicyanamide, Bis(trifluoromethanesulfonyl)imide and Dimethylphosphate Ionic Liquids
Zheng, Yong1; Zheng, Yongjun1; Wang, Qian2; Lv, Huichao1; Wang, Zhen1
2021-11-01
Source PublicationINTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
ISSN1452-3981
Volume16Issue:11Pages:12
Abstract1,3-dimethylimidazolium-based ionic liquids show promise as electrolytes because of their special cation structure. However, their electrochemical properties remain less understood. Thus, 1,3-dimethylimidazolium dicyanamide, bis(trifluoromethanesulfonyl)imide and dimethylphosphate were chosen as representative 1,3-dimethylimidazolium-based ionic liquids in this work. The electrical conductivity and molar conductivity of these ionic liquids were measured and calculated from 303.15 to 353.15 K, which were well fitted with empirical equations. Meanwhile, the corresponding electrochemical window and differential capacitance were also obtained by cyclic voltammetry and impedance measurements, respectively. On the basis of experimental data and theoretical calculations, the relationships between the electrochemical properties and molecular structures of the ionic liquids were assessed in detail. These ionic liquids have higher electrical conductivity and wider electrochemical windows than many other 1-alkyl-3-methylimidaozlium-based ionic liquids with the same anions. These phenomena are probably ascribed to the higher structural symmetry, stronger cation-anion interaction and smaller size of the 1,3-dimethylimidazolium cation. Moreover, 1,3-dimethylimidazolium dicyanamide has a higher dissociation of ions, while 1,3-dimethylimidazolium bis(trifluoromethanesulfonyl)imide and dimethylphosphate have a lower ionic dissociation. 1,3-dimethylimidazolium cations are prone to be adsorbed onto the Pt plate electrodes when the cation-anion interaction is lower. It is hoped that the present work will provide important electrochemical research results for the future application of these ionic liquids.
Keyword1,3-dimethylimidazolium ionic liquid electrical conductivity electrochemical window differential capacitance
DOI10.20964/2021.11.43
Language英语
WOS KeywordELECTRIC DOUBLE-LAYER ; PHYSICOCHEMICAL PROPERTIES ; DIFFERENTIAL CAPACITANCE ; ELECTRODEPOSITION ; ELECTROLYTES ; MIXTURES ; DENSITY ; AIR
Funding ProjectNational Natural Science Foundation of China[21406002] ; National Natural Science Foundation of China[21702005] ; Key Scientific Research Projects of Colleges in Henan Province[20B530001] ; Scientific Research Foundation of Anyang Institute of Technology[YPY2020005]
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
Funding OrganizationNational Natural Science Foundation of China ; Key Scientific Research Projects of Colleges in Henan Province ; Scientific Research Foundation of Anyang Institute of Technology
WOS IDWOS:000718325900010
PublisherESG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/51058
Collection中国科学院过程工程研究所
Corresponding AuthorZheng, Yong
Affiliation1.Anyang Inst Technol, Coll Chem & Environm Engn, Anyang 455000, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Zheng, Yong,Zheng, Yongjun,Wang, Qian,et al. Electrochemical Properties of 1,3-Dimethylimidazolium Dicyanamide, Bis(trifluoromethanesulfonyl)imide and Dimethylphosphate Ionic Liquids[J]. INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,2021,16(11):12.
APA Zheng, Yong,Zheng, Yongjun,Wang, Qian,Lv, Huichao,&Wang, Zhen.(2021).Electrochemical Properties of 1,3-Dimethylimidazolium Dicyanamide, Bis(trifluoromethanesulfonyl)imide and Dimethylphosphate Ionic Liquids.INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE,16(11),12.
MLA Zheng, Yong,et al."Electrochemical Properties of 1,3-Dimethylimidazolium Dicyanamide, Bis(trifluoromethanesulfonyl)imide and Dimethylphosphate Ionic Liquids".INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE 16.11(2021):12.
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