Benzimidazole-derived anion for lithium-conducting electrolytes
Leszek Niedzicki , Piotr Oledzki , Anna Bitner-Michalska , Maria Bukowska , Przemysław Szczeciński
AbstractIn this work we announce new lithium salt of 5,6-dicyano-2-(trifluoromethyl)benzimidazolide (LiTDBI) designed for application in lithium conductive electrolytes. It was synthesized and completely characterized by NMR techniques. Studies show salt's thermal stability up to 270 °C and electrochemical stability in liquid solvents up to +4.7 V vs. metallic lithium anode. Basic characterization of electrolytes made with this salt show conductivity over 1 mS cm−1 and unusually high transference number at high concentrations (0.74 in EC:DMC 1:2 ratio mixture) along with low onset of conductivity peak. As a final proof of concept, cycling in half-cell was performed and electrolyte based on LiTDBI showed perfect capacity retention. Such properties show remarkable progress in creating efficient lithium-conducting electrolytes with use of weakly-coordinating anions.
|Journal series||Journal of Power Sources, ISSN 0378-7753|
|Publication size in sheets||0.5|
|Keywords in English||Lithium-ion; Salt; Electrolyte; Synthesis; Benzimidazole; Transference number|
|Score|| = 40.0, 28-11-2017, ArticleFromJournal|
= 45.0, 28-11-2017, ArticleFromJournal
|Publication indicators||: 2016 = 6.395 (2) - 2016=6.117 (5)|
|Citation count*||1 (2016-06-01)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.