Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

Room-temperature electrochemical fluoride (de)insertion into CsMnFeF6

Tools
- Tools
+ Tools

Andrews, Jessica L., McClure, Eric T., Jew, Kenneth K., Preefer, Molleigh B., Irshad, Ahamed, Lertola, Matthew J., Robertson, Daniel D., Salamat, Charlene Z., Brady, Michael J., Piper, Louis F. J., Tolbert, Sarah H., Nelson Weker, Johanna, Chmelka, Bradley F., Dunn, Bruce S., Narayan, Sri R., West, William C. and Melot, Brent C. (2022) Room-temperature electrochemical fluoride (de)insertion into CsMnFeF6. ACS Energy Letters (7). pp. 2340-2348. doi:10.1021/acsenergylett.2c01324 ISSN 2380-8195.

[img]
Preview
PDF
WRAP-Room-temperature-electrochemical-fluoride-de-insertion-defect-pyrochlore-2022.pdf - Accepted Version - Requires a PDF viewer.

Download (4Mb) | Preview
Official URL: https://doi.org/10.1021/acsenergylett.2c01324

Request Changes to record.

Abstract

We report on the reversible, electrochemical (de)fluorination of CsMnFeF6 at room temperature using a liquid electrolyte. CsMnFeF6 was synthesized via three methods (hydrothermal, ceramic, and mechanochemical), each of which yields products in a defect pyrochlore structure with varying particle sizes and phase purities. After three galvanostatic cycles, approximately one fluoride ion can be reversibly (de)inserted into mechanochemical CsMnFeF6 for multiple cycles. Ex situ X-ray absorption spectroscopy confirmed that both Mn2+ and Fe3+ are redox active. The cell impedance decreases after one cycle, suggesting that the formation of fluoride vacancies in early cycles generates mixed-valent Fe and enhances the material’s conductivity. Ex situ synchrotron diffraction revealed subtle expansion and contraction of the CsMnFeF6 cubic lattice on insertion and removal, respectively, during the first two cycles. New reflections intensify in the ex situ diffraction patterns from cycle 3, corresponding to a topotactic transformation of CsMnFeF6 from the pyrochlore structure into an orthorhombic polytype that continues cycling fluoride ions reversibly.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Lithium ion batteries , Lithium ion batteries -- Materials, Electrodes , Fluorine, Electrochemistry , Solid state batteries -- Materials, Energy storage
Journal or Publication Title: ACS Energy Letters
Publisher: American Chemical Society (ACS)
ISSN: 2380-8195
Official Date: 21 June 2022
Dates:
DateEvent
21 June 2022Published
13 June 2022Accepted
Number: 7
Page Range: pp. 2340-2348
DOI: 10.1021/acsenergylett.2c01324
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 7 July 2022
Date of first compliant Open Access: 21 June 2023
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
DESC0019381U.S. Department of Energyhttp://dx.doi.org/10.13039/100000015
DGE-1842487[NSF] National Science Foundation (US)http://dx.doi.org/10.13039/100000001
DGE-2034835[NSF] National Science Foundation (US)http://dx.doi.org/10.13039/100000001

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics

twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us