• Media type: E-Article
  • Title: Electrochemical Properties of Trimethylammonium Tetrafluoroborate in Electrochemical Double-Layer Capacitors
  • Contributor: Lee, Sooyeon; Lee, Kyung Min; Kim, Ketack
  • imprint: The Korean Electrochemical Society - English Journal, 2022
  • Published in: Journal of Electrochemical Science and Technology
  • Language: English
  • DOI: 10.33961/jecst.2021.00787
  • ISSN: 2093-8551; 2288-9221
  • Keywords: Electrochemistry
  • Origination:
  • Footnote:
  • Description: <jats:p>Trimethylammonium tetrafluoroborate (TriMA BF4), consisting of the smallest trialkylammonium ion, was investigated for use in electrochemical double-layer capacitors. Despite the presence of a proton in TriMA+, cycle life tests in acetonitrile (AN) and -butyrolactone (GBL) showed a good capacity retention with a 1.8 V cut-off voltage. The rate of electrolysis of TriMA BF4 in GBL was lower than that in AN because of the lower conductivity in GBL. As a consequence, the cells based on GBL achieved a higher capacitance and longer life than those with AN. TriMA BF4 had a higher conductivity and lower viscosity than the quaternary salt tetraethylammonium tetrafluoroborate in GBL, as well as higher ionic mobility, these factors resulted in a higher rate capability.</jats:p>
  • Access State: Open Access