Benzimidazole-derived anion for lithium-conducting electrolytes

Leszek Niedzicki , Piotr Oledzki , Anna Bitner-Michalska , Maria Bukowska , Przemysław Szczeciński


In 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.
Author Leszek Niedzicki KChNTCS
Leszek Niedzicki,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Piotr Oledzki WCh
Piotr Oledzki,,
- Faculty of Chemistry
, Anna Bitner-Michalska KChNTCS
Anna Bitner-Michalska,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Maria Bukowska ZChO
Maria Bukowska,,
- Department Of Organic Chemistry
, Przemysław Szczeciński ZChO
Przemysław Szczeciński,,
- Department Of Organic Chemistry
Journal seriesJournal of Power Sources, ISSN 0378-7753
Issue year2016
Publication size in sheets0.5
Keywords in EnglishLithium-ion; Salt; Electrolyte; Synthesis; Benzimidazole; Transference number
Languageen angielski
1-s2.0-S0378775315306212-main.pdf 455.27 KB
Score (nominal)45
ScoreMinisterial score = 40.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 6.395 (2) - 2016=6.117 (5)
Citation count*1 (2016-06-01)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.