Effect of Functionalized Ionic Liquids on the Stability of V(acac)3

Seo Kyoung Park; Cheol Jin Oh; Sang Gil Kim; Byung Jun Lee; Ji Hyun Lee; Je Seung Lee

doi:10.1002/bkcs.11544

Effect of Functionalized Ionic Liquids on the Stability of V(acac)₃

Seo Kyoung Park, Cheol Jin Oh, Sang Gil Kim, Byung Jun Lee, Ji Hyun Lee, Je Seung Lee

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

V(acac)₃, one of the most promising candidates for the active material of non-aqueous RFB, has various drawbacks such as the change of color, precipitation, and lowering capacity during RFB operation due to the sensitiveness of V(acac)₃ to oxygen. The stability of V(acac)₃ under air was studied using electrochemical analysis, FT-IR, UV–Vis, and XPS spectroscopic methods. The 0.01 M solution of V(acac)₃ turns to VO(acac)₂ in 3 days under air implying that V(acac)₃ is sensitive to the O₂ (g) in the air. The ionic liquid (IL) containing functional group was added to V(acac)₃ solution as the supporting electrolyte. Although the addition of IL, bearing the electron withdrawing group(s) on the cation, almost did not affect the stability of V(acac)₃, the stability of V(acac)₃ was significantly increased up to 7 days in the presence of IL containing an electron donating group on the cation.

Original language	English
Pages (from-to)	1036-1040
Number of pages	5
Journal	Bulletin of the Korean Chemical Society
Volume	39
Issue number	9
DOIs	https://doi.org/10.1002/bkcs.11544
Publication status	Published - Sept 2018

Bibliographical note

Publisher Copyright:
© 2018 Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

Ionic liquid
Non-aqueous
Redox flow battery
Stability
Vanadium complex

Access to Document

10.1002/bkcs.11544

Cite this

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title = "Effect of Functionalized Ionic Liquids on the Stability of V(acac)3 ",

abstract = "V(acac)3, one of the most promising candidates for the active material of non-aqueous RFB, has various drawbacks such as the change of color, precipitation, and lowering capacity during RFB operation due to the sensitiveness of V(acac)3 to oxygen. The stability of V(acac)3 under air was studied using electrochemical analysis, FT-IR, UV–Vis, and XPS spectroscopic methods. The 0.01 M solution of V(acac)3 turns to VO(acac)2 in 3 days under air implying that V(acac)3 is sensitive to the O2 (g) in the air. The ionic liquid (IL) containing functional group was added to V(acac)3 solution as the supporting electrolyte. Although the addition of IL, bearing the electron withdrawing group(s) on the cation, almost did not affect the stability of V(acac)3, the stability of V(acac)3 was significantly increased up to 7 days in the presence of IL containing an electron donating group on the cation.",

keywords = "Ionic liquid, Non-aqueous, Redox flow battery, Stability, Vanadium complex",

author = "Park, {Seo Kyoung} and Oh, {Cheol Jin} and Kim, {Sang Gil} and Lee, {Byung Jun} and Lee, {Ji Hyun} and Lee, {Je Seung}",

note = "Publisher Copyright: {\textcopyright} 2018 Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2018",

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T1 - Effect of Functionalized Ionic Liquids on the Stability of V(acac)3

AU - Park, Seo Kyoung

AU - Oh, Cheol Jin

AU - Kim, Sang Gil

AU - Lee, Byung Jun

AU - Lee, Ji Hyun

AU - Lee, Je Seung

PY - 2018/9

Y1 - 2018/9

N2 - V(acac)3, one of the most promising candidates for the active material of non-aqueous RFB, has various drawbacks such as the change of color, precipitation, and lowering capacity during RFB operation due to the sensitiveness of V(acac)3 to oxygen. The stability of V(acac)3 under air was studied using electrochemical analysis, FT-IR, UV–Vis, and XPS spectroscopic methods. The 0.01 M solution of V(acac)3 turns to VO(acac)2 in 3 days under air implying that V(acac)3 is sensitive to the O2 (g) in the air. The ionic liquid (IL) containing functional group was added to V(acac)3 solution as the supporting electrolyte. Although the addition of IL, bearing the electron withdrawing group(s) on the cation, almost did not affect the stability of V(acac)3, the stability of V(acac)3 was significantly increased up to 7 days in the presence of IL containing an electron donating group on the cation.

AB - V(acac)3, one of the most promising candidates for the active material of non-aqueous RFB, has various drawbacks such as the change of color, precipitation, and lowering capacity during RFB operation due to the sensitiveness of V(acac)3 to oxygen. The stability of V(acac)3 under air was studied using electrochemical analysis, FT-IR, UV–Vis, and XPS spectroscopic methods. The 0.01 M solution of V(acac)3 turns to VO(acac)2 in 3 days under air implying that V(acac)3 is sensitive to the O2 (g) in the air. The ionic liquid (IL) containing functional group was added to V(acac)3 solution as the supporting electrolyte. Although the addition of IL, bearing the electron withdrawing group(s) on the cation, almost did not affect the stability of V(acac)3, the stability of V(acac)3 was significantly increased up to 7 days in the presence of IL containing an electron donating group on the cation.

KW - Ionic liquid

KW - Non-aqueous

KW - Redox flow battery

KW - Stability

KW - Vanadium complex

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