A Novel Aqueous-based Gelcasting Process to Fabricate Li6.4La3Zr1.4Ta0.6O12 Solid Electrolytes

Xiang PENG, Xiaokun ZHANG, Kai HUANG, Shipai SONG, Yong XIANG*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

8 Citations (Scopus)


A novel aqueous-based gelcasting technique is developed to fabricate dense Li6.4La3Zr1.4Ta0.6O12 (LLZTO) electrolytes with complex structures, which is based on an aqueous slurry with a solid LLZTO fraction of 75 wt % and a copolymer of isobutylene and maleic anhydride as dispersant as well as gelling agent. A new recipe is developed by introducing LiOH into the aqueous slurry to suppress the Li+/H+ exchange reaction, ensuring that the gelcasting LLZTO has a pure cubic garnet phase. The gelcasting LLZTO has a high ionic conductivity of 0.74×10−3 S cm−1 (25 °C), an excellent lithium cycling stability, and a wide voltage window up to 5 V, which are comparable with literature reports and can satisfy the requirements of the next-generation lithium batteries with higher energy densities. The aqueous-based gelcasting technique is promising in the cost-efficient and environment-friendly manufacturing of high-quality LLZTO solid electrolytes for all-solid-state batteries.

Original languageEnglish
Pages (from-to)2945-2948
Number of pages4
Issue number11
Early online date21 May 2019
Publication statusPublished - 3 Jun 2019
Externally publishedYes

Bibliographical note

This research is supported by China Postdoctoral Science Foundation (contract No. 2018M643444) and Science and Technology Program of Sichuan (contract No. 2018JY0554). The authors would like to thank Prof. Wang Shi Wei (Shanghai Institute of Ceramics, Chinese Academy of Sciences) for introducing the copolymer of isobutylene and maleic anhydride.


  • aqueous-based gelcasting
  • complex structure
  • cubic phase
  • LiLaZrTaO
  • solid electrolytes


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