Lithium salts based on a series of new anilinyl-perfluorosulfonamide salts and their polymer electrolytes Articles uri icon

publication date

  • October 2017

start page

  • 138

end page

  • 147

volume

  • 364

International Standard Serial Number (ISSN)

  • 0378-7753

Electronic International Standard Serial Number (EISSN)

  • 1873-2755

abstract

  • Polymer electrolytes based on a series of new lithium anilinyl-perfluorosulfonamide exhibit conductivities close to LiTFSI ones and higher cationic transference numbers. Taking advantage of an extended delocalization on the negative charge, the anodic stability of the salts was found to range between 4.2 and 4.9 V vs Li/Li+, according to the electron-withdrawing group EWG located in para/ortho position. The simplicity of the synthesis process of the new salts, with lower fluorine content than LiPF6 and LiTFSI, paves the way for a further semi-pilot scale-up. Moreover, Linear Free Energy Relationships, LFER, were established for the first time, for both ionic conductivity and anodic stability. These LFER demonstrate unambiguously and quantitatively the conductivity dependence on anion basicity. Polymer electrolytes were soundly investigated through a variety of physicochemical and electrochemical characterizations. (C) 2017 Elsevier B.V. All rights reserved.

keywords

  • lithium salts; polymer electrolytes; poe/peo; linear free energy relationship; anodic stability