Redox reaction of 2, 2, 6, 6-tetramethylpiperidine-l-oxyI (TEMPO) in lithium bis(trifluoromethylsulfonyl)amide-tetraglyme solvate ionic liquid

Yasushi Katayama, K. Wada, N. Tachikawa, Nobuyuki Serizawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The redox reaction of 2, 2, 6, 6-tetramethylpiperidine-l-oxyl (TEMPO) has been investigated in a solvate ionic liquid composed of lithium bis(trifluoromethylsulfonyl)amide (LiTFSA) and tetraglyme (G4). The one-electron transfer and quasi-reversible redox reaction of TEMPO+/TEMPO was observed in the stable electrochemical potential window of the solvate ionic liquid. The formal potential of TEMPO'S/TEMPO was 0.19 V vs. Ferrocene/ferrocenium. The diffusion coefficients of TEMPO and TEMPO + at 298 K were 1.8 × 10 -7 and 7.6 × 10 -8 cm 2 s -1 , respectively, reflecting the coulombic interaction between the charged species with the anion of the solvate ionic liquid. The standard rate constant for the redox reaction of TEMPO + /TEMPO at 298 K was 1.9 × 10 -4 cm s -1 . Charge-discharge of a lithium secondary cell using a lithium-ion conductive glass-ceramics (LICGC) as a diaphragm and [Li(G4)]TFSA containing TEMPO as a catholyte was found to be possible with the average discharge voltage of 3.4 V.

Original languageEnglish
Title of host publicationECS Transactions
EditorsW. Matthew Reichert, Hugh C. De Long, Minoru Mizuhata, David P. Durkin, Paul C. Trulove, Adriana Ispas, Andreas Bund, Robert A. Mantz, Elizabeth J. Biddinger, Alice H. Suroviec, Luke M. Haverhals, Mikito Ueda
PublisherElectrochemical Society Inc.
Pages113-116
Number of pages4
Edition14
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2018 Jan 1
EventSymposium on Molten Salts and Ionic Liquids 21 - AiMES 2018, ECS and SMEQ Joint International Meeting - Cancun, Mexico
Duration: 2018 Sep 302018 Oct 4

Publication series

NameECS Transactions
Number14
Volume86
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

ConferenceSymposium on Molten Salts and Ionic Liquids 21 - AiMES 2018, ECS and SMEQ Joint International Meeting
CountryMexico
CityCancun
Period18/9/3018/10/4

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Katayama, Y., Wada, K., Tachikawa, N., & Serizawa, N. (2018). Redox reaction of 2, 2, 6, 6-tetramethylpiperidine-l-oxyI (TEMPO) in lithium bis(trifluoromethylsulfonyl)amide-tetraglyme solvate ionic liquid. In W. M. Reichert, H. C. De Long, M. Mizuhata, D. P. Durkin, P. C. Trulove, A. Ispas, A. Bund, R. A. Mantz, E. J. Biddinger, A. H. Suroviec, L. M. Haverhals, & M. Ueda (Eds.), ECS Transactions (14 ed., pp. 113-116). (ECS Transactions; Vol. 86, No. 14). Electrochemical Society Inc.. https://doi.org/10.1149/08614.0113ecst