Processing combustion synthesized Mg0. 5Zr2 (PO4) 3 nanopowders to thin films as potential solid electrolytes

Richard Laine

Saiyue Liu, Chang Zhou, You Wang, Eongyu Yi, Weimin Wang, John Kieffer, and Richard Laine (2020)

Electrochemistry Communications, 116:106753.

Mg0.5Zr2(PO4)3 is a promising electrolyte for Mg solid-state batteries. But it is difficult to achieve high-density thin films with phase purity. Here, we synthesized Mg0.5(1+x)FexZr2−x(PO4)3 nanopowders using liquid-feed flame spray pyrolysis and used the product to form transparent thin films via simple pressureless sintering at 1100 °C. The influence of Fe on the phase and microstructure were discussed and the bottlenecks during Mg2+ conduction pathway were calculated. The dense and high-purity Mg0.6Fe0.2Zr1.8(PO4)3 exhibited an extremely low ionic area specific resistance of 1.6 kΩ cm2 at 200 °C. This paper presents a method for preparing dense, high-purity solid electrolytes at modest sintering temperatures.

Solid electrolyte, Thin film, flame spray pyrolysis, Mg Battery

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