A comparison among LiPF6, LiPF3(CF2CF3)3 (LiFAP), and LiN(SO2CF2CF3)2 (LiBETI) solutions: Electrochemical and thermal studies

J. S. Gnanaraj, E. Zinigrad, M. D. Levi, D. Aurbach, M. Schmidt

Research output: Contribution to journalConference articlepeer-review

72 Scopus citations

Abstract

EC-DMC-DEC solutions comprising LiPF3(CF2CF3)3 (LiFAP), LiPF6 and LiN(SO2CF2CF3)2 (LiBETI) were tested with graphite and LiMn2O4 electrodes. Cyclic voltammetry (CV, fast and slow scan rates), chronopotentiometry, impedance spectroscopy, surface sensitive FTIR and XPS were used for this study. It was found that the new salt LiFAP is a promising candidate for use in rechargeable Li-ion batteries. The thermal behavior of these electrolyte solutions was also studied using accelerating rate calorimetry (ARC). It was found that LiFAP solutions are more stable than LiPF6 solutions while LiBETI solutions have the highest thermal stability.

Original languageEnglish
Pages (from-to)799-804
Number of pages6
JournalJournal of Power Sources
Volume119-121
DOIs
StatePublished - 1 Jun 2003
EventSelected Papers Presented at the 11th IMLB - Monterey, CA, United States
Duration: 22 Jun 200228 Jun 2002

Bibliographical note

Funding Information:
Partial support for this work was obtained from the BMBF, the German Ministry of Science, in the framework of the DIP program for Collaboration Between Israeli and German Scientists.

Keywords

  • ARC
  • Impedance spectroscopy
  • Li-ion batteries
  • LiN(SOCFCF) (LiBETI)
  • LiPF
  • LiPF(CFCF) (LiFAP)
  • Surface films
  • Thermal stability

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