Garnet-like Li₇La₃Zr₂O₁₂ electrolytes with Nb doping are synthesized by self-consolidation method. Different from conventional methods such as cold or hot isostatic pressing, not any pressing assistance is employed throughout the preparation process. Although the preparation process is dramatically simplified, both density and ionic conductivity of the obtained samples are enhanced. Nb-doped content plays a key role in the sintering of the packed precursor powders and in the structure stabilization of the obtained bulk samples. The optimized 0.60 mol Nb-doped sample with relative density of 94%, fine particle boundaries, and solitary cubic structure possesses the maximum total ionic conductivity of 5.22 × 10⁻⁴ S cm⁻¹ at 30 °C, which is comparable to the highest reported value of the samples prepared by conventional pressing methods. This work verifies that self-consolidation strategy is effective, reliable, and productive for the preparation of cubic Li₇La₃Zr₂O₁₂ electrolyte, which would significantly facilitate the development of ceramic electrolyte membrane technology.

采用自固结法合成了Nb掺杂的石榴石状Li ₇ La ₃ Zr ₂ O ₁₂电解质。与常规方法（例如冷或热等静压）不同，在整个制备过程中不使用任何压榨辅助。尽管大大简化了制备过程，但获得的样品的密度和离子电导率均得到提高。掺Nb的含量在填充前体粉末的烧结和所获得的块状样品的结构稳定性中起着关键作用。经过优化的0.60 mol Nb掺杂样品具有94％的相对密度，细颗粒边界和孤立的立方结构，具有的最大总离子电导率为5.22×10 ^-4在30°C下的 S cm ^-1，与通过传统压制方法制备的样品的最高报告值相当。这项工作证明了自固结策略对于制备立方晶Li ₇ La ₃ Zr ₂ O ₁₂电解质是有效，可靠和有效的，这将极大地促进陶瓷电解质膜技术的发展。