Jump to main content
Jump to site search

Issue 14, 2018
Previous Article Next Article

A promising bulky anion based lithium borate salt for lithium metal batteries

Author affiliations

Abstract

A new salt of lithium trifluoro(perfluoro-tert-butyloxyl)borate (LiTFPFB) which possesses a bulky fluoroalkoxyl functional group in the borate anion has been synthesized for high energy lithium metal batteries. The presence of the bulky fluoroalkoxyl group in the borate anion of LiTFPFB can facilitate ion dissociation and in situ generate a protective film on the Li anode. As a result, LiTFPFB possesses a dramatically improved ionic conductivity and LiFePO4/Li cells using 1.0 M LiTFPFB/PC electrolyte exhibit improved capacity retention especially upon cycling at elevated temperature (60 °C). Ex situ surface analysis reveals that a protective film is formed on the lithium metal anode, which can inhibit further decomposition of the electrolyte. Furthermore, the LiTFPFB based electrolyte also imparts an excellent cycling performance to LiCoO2/Li metal cells for 500 cycles. The outstanding performance of the LiTFPFB salt demonstrates that it is a very promising baseline salt for next generation lithium metal batteries.

Graphical abstract: A promising bulky anion based lithium borate salt for lithium metal batteries

Back to tab navigation

Supplementary files

Publication details

The article was received on 04 Jan 2018, accepted on 28 Feb 2018 and first published on 01 Mar 2018


Article type: Edge Article
DOI: 10.1039/C8SC00041G
Citation: Chem. Sci., 2018,9, 3451-3458
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    A promising bulky anion based lithium borate salt for lithium metal batteries

    L. Qiao, Z. Cui, B. Chen, G. Xu, Z. Zhang, J. Ma, H. Du, X. Liu, S. Huang, K. Tang, S. Dong, X. Zhou and G. Cui, Chem. Sci., 2018, 9, 3451
    DOI: 10.1039/C8SC00041G

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements