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<p>As a preliminary investigation into the feasibility of simultaneously using oxide-based solid electrolytes and carbonate-based liquid electrolytes as the quasi-solid electrolyte in lithium-ion batteries, the effects of the chemical component, and physicochemical properties of the liquid electrolyte were evaluated. The liquid electrolyte (composed of lithium hexafluorophosphate, ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and VC) was soaked for at least 24&#xa0;h at 25 ± 2&#xa0;°C with Mg- and Sr-doped garnet-type Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> (LLZO) particles (median diameter of 0.9&#xa0;μm) in the weight ratio of 5:1 (liquid: solid). This “contacted” liquid electrolyte was compared with the uncontacted liquid electrolyte. After contact with LLZO, difluorophosphate ions which was detected at a concentration of 4.2 mmol L<sup>− 1</sup>, was no longer detected, and the concentration of vinylene carbonate as electrolyte additive was reduced relative to that of the uncontacted electrolyte (1 wt%). Furthermore, the concentrations of Zr, La, and Sr increased to the sub-ppm order in the soaked electrolyte. However, no significant differences were observed in the ionic conductivity, self-diffusion coefficients of lithium and hexafluorophosphate ions, and solvent components under the tested conditions.</p> Graphical abstract <p></p>

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Chemical and physicochemical analysis of carbonate based electrolyte with LiPF6 in contact with Li7La3Zr2O12 based oxide solid electrolyte particles for 24 h immersion

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • Yuu Watanabe,
  • Ryunosuke Kajiura,
  • Kazuki Kataoka,
  • Masato Taki,
  • Takanao Ishikawa,
  • Akihiro Suzuki

摘要

As a preliminary investigation into the feasibility of simultaneously using oxide-based solid electrolytes and carbonate-based liquid electrolytes as the quasi-solid electrolyte in lithium-ion batteries, the effects of the chemical component, and physicochemical properties of the liquid electrolyte were evaluated. The liquid electrolyte (composed of lithium hexafluorophosphate, ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate and VC) was soaked for at least 24 h at 25 ± 2 °C with Mg- and Sr-doped garnet-type Li7La3Zr2O12 (LLZO) particles (median diameter of 0.9 μm) in the weight ratio of 5:1 (liquid: solid). This “contacted” liquid electrolyte was compared with the uncontacted liquid electrolyte. After contact with LLZO, difluorophosphate ions which was detected at a concentration of 4.2 mmol L− 1, was no longer detected, and the concentration of vinylene carbonate as electrolyte additive was reduced relative to that of the uncontacted electrolyte (1 wt%). Furthermore, the concentrations of Zr, La, and Sr increased to the sub-ppm order in the soaked electrolyte. However, no significant differences were observed in the ionic conductivity, self-diffusion coefficients of lithium and hexafluorophosphate ions, and solvent components under the tested conditions.

Graphical abstract