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<p>In order to replace conventional liquid electrolytes, a solid electrolyte should possess high ionic conductivity. In this study, the effects of Ga-Ce co-doping on the garnet Li<sub>7</sub>La<sub>3</sub>Zr<sub>2</sub>O<sub>12</sub> solid electrolyte have been investigated. The series Li<sub>6.4</sub>Ga<sub>0.2</sub>La<sub>3</sub>Zr<sub>2−<i>x</i></sub>Ce<sub><i>x</i></sub>O<sub>12</sub> has been prepared with varying Ce contents from 0 to 0.30 atoms per formula unit (a.p.f.u.) by sintering at 1050°C. Various structural characterizations, namely x-ray diffraction, scanning electron microscopy (SEM), and density measurements are carried out. The electrochemical analysis suggested that the sample Li<sub>6.4</sub>Ga<sub>0.2</sub>La<sub>3</sub>Zr<sub>1.9</sub>Ce<sub>0.1</sub>O<sub>12</sub> offered the highest room temperature ionic conductivity of 4 × 10<sup>−4</sup> S/cm with the minimum activation energy of 0.29&#xa0;eV. Moreover, direct current (DC) conductivity measurement proved the predominant ionic conduction in the prepared samples, making it suitable for the application in all solid-state Li-ion batteries (ASSLIBs).</p>

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Impact of Ce Substitution on Structural and Electrochemical Properties of Ga-Doped Garnet Li7La3Zr2O12 Solid Electrolyte

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • Muktai Aote,
  • A. V. Deshpande,
  • Vaibhav Sirsulwar,
  • Priya Padaganur,
  • Neha,
  • Abhishek Pradhan

摘要

In order to replace conventional liquid electrolytes, a solid electrolyte should possess high ionic conductivity. In this study, the effects of Ga-Ce co-doping on the garnet Li7La3Zr2O12 solid electrolyte have been investigated. The series Li6.4Ga0.2La3Zr2−xCexO12 has been prepared with varying Ce contents from 0 to 0.30 atoms per formula unit (a.p.f.u.) by sintering at 1050°C. Various structural characterizations, namely x-ray diffraction, scanning electron microscopy (SEM), and density measurements are carried out. The electrochemical analysis suggested that the sample Li6.4Ga0.2La3Zr1.9Ce0.1O12 offered the highest room temperature ionic conductivity of 4 × 10−4 S/cm with the minimum activation energy of 0.29 eV. Moreover, direct current (DC) conductivity measurement proved the predominant ionic conduction in the prepared samples, making it suitable for the application in all solid-state Li-ion batteries (ASSLIBs).