Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (3): 905-913.doi: 10.19799/j.cnki.2095-4239.2021.0058

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Solvothermal synthesis of three-dimensional petaloid garnet electrolyte and its application in solid polymer electrolytes

Yanfang ZHAI1(), Guanming YANG1, Wangshu HOU1, Jianyao YAO1, Zhaoyin WEN2, Shufeng SONG1(), Ning HU3()   

  1. 1.College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
    2.CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    3.State Key Laboratory of Reliability and Intelligence Electrical Equipment, Hebei University of Technology
  • Received:2021-02-08 Revised:2021-03-10 Online:2021-05-05 Published:2021-04-30
  • Contact: Shufeng SONG,Ning HU E-mail:zyf18223085635@163.com;sfsong@ cqu.edu.cn;ninghu@hebut.edu.cn

Abstract:

Under the considerations of superior ionic conductivities, excellent stable interphase with lithium metal anode, and low cost, lithium-stuffed garnets have been recognized as one of the most promising solid-state lithium electrolytes. Research on garnets and their composite electrolytes inspired the battery community over the past 10 years. However, the exploration of the unique morphologies of garnet-type electrolytes derived from new synthesis methods has received hardly any attention thus far, although the morphologies of garnet electrolytes are important for their applications in solid polymer electrolytes. Herein, we report a solvothermal method to synthesize a unique nanostructured garnet-type electrolyte, viz. cubic three-dimensional petaloid garnet electrolytes. Uniform aluminum-lanthanum-zirconium glycerate solid spheres are first synthesized as precursors and subsequently chemically transformed into three-dimensional petaloid garnet electrolytes. A composite solid polymer electrolyte containing 10% three-dimensional petaloid garnet exhibits a practically useful conductivity of 5.59 × 10-5 S·cm-1 at 25 ℃. For comparison, a composite solid polymer electrolyte containing 10% garnet nanoparticle shows a conductivity of 1.45 × 10-5 S·cm-1. This finding provides a strategy to explore superionic conductors.

Key words: solid-state battery, three-dimensional petaloid garnet electrolyte, solvothermal method, solid polymer electrolyte, conductivity

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