Фізика і хімія твердого тіла (Mar 2024)

Interaction of electrolyte molecules with the surface of porous carbon: NMR study

  • I.M. Budzuliak,
  • L.S. Yablon,
  • V.O. Kotsyubynsky,
  • B.I. Rachii,
  • I.I. Budzuliak,
  • V.M. Boychuk,
  • R.V. Ilnytskyi,
  • R.I. Kryvulych

DOI
https://doi.org/10.15330/pcss.25.1.212-216
Journal volume & issue
Vol. 25, no. 1
pp. 212 – 216

Abstract

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Electrochemical double-layer capacitors use porous carbons as the electrode material, and improving their performance requires an understanding of the electrolyte−carbon surface interactions. 13C, 14N, and 11B NMR spectroscopy were used to investigate the behaviour of the electrolytes [C(OCH3)3NH3]+Cl- and [N(CH2CH3)]+BF4- on the surface of porous carbon in D2O solutions. A chemical shift of 13C has been found in the fragments N–C, indicating electron density redistribution between nitrogen atoms and alkyl fragments. The presence of a signal with a chemical shift of d = 7.7 confirms the structuring of the electrolytic layer of water solution [N(CH2CH3)]+BF4-.

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