CeO2-based composite solid electrolyte material and preparation method thereof

The invention discloses a CeO2-based composite solid electrolyte material and a preparation method thereof. The structural general formula of the CeO2-based composite solid electrolyte material is asfollows: Ce0.8Pr0.1La0.1O2-delta.x(Li0.5K0.5Cl), and delta is oxygen deficit. The Ce0.8Pr0.1La0.1O2-delta material is doped with a specific low-melting-point salt Li0.5K0.5Cl through a microwave combustion-supporting method, the CeO2-based solid composite electrolyte material is formed, the conductivity of the material in medium and low temperature stages can be greatly improved, the electrochemical performance of the material is improved, and the method is simple in preparation process, low in cost, quick, energy-saving and environment-friendly. 本发明公开了一种CeO基复合固体电解质材料及其制备方法，该CeO基复合固体电解质材料的结构通式如下：CePrLaO·x(LiKCl)，式中δ为缺氧量。本发明通过微波助燃法在CePrLaO材料中掺杂特定的低熔点盐LiKCl，形成了CeO基固体复合电解质材料，能够大大提高材料在中低温阶段的电导率，改善材料的电化学性能，而且制备工艺简单、成本低、快速节能环保。