Electrochemical quartz crystal microbalance measurement of a Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> composite electrode in a carbonate electrolyte

Nobuyuki Serizawa, Kumi Shono, Yo Kobayashi, Hajime Miyashiro, Yasushi Katayama, Takashi Miura

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Abstract Electrochemical quartz crystal microbalance (EQCM) measurement is conducted with a Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> (lithium titanium oxide, LTO)-coated quartz crystal electrode in a carbonate electrolyte (ethylene carbonate + dimethyl carbonate; 50: 50 vol%) containing 1 M LiPF<inf>6</inf>. In-situ monitoring of the mass change during the charge and discharge of the LTO electrode can be achieved quantitatively because of the "zero-strain" property of LTO with Li<sup>+</sup> insertion and the probably low reactivity between LTO and the electrolyte. The local changes of viscosity and density of the electrolyte contacting the LTO electrode are detected via the resonance resistance of the quartz crystal electrode, suggesting the local concentrations of Li<sup>+</sup> and counter anion changed significantly during insertion and extraction of Li<sup>+</sup> in the organic electrolyte.

Original languageEnglish
Article number21432
Pages (from-to)162-166
Number of pages5
JournalJournal of Power Sources
Publication statusPublished - 2015 Jul 14



  • EQCM
  • Lithium battery
  • Lithium titanium oxide
  • Local viscosity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

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