Scalable Li_1.5Al_0.5Ge_1.5(PO₄)₃ thin membrane prepared by tape-casting for large-scale lithium–air battery application

ABSTRACT

Thin NASICON-type Li_1.5Al_0.5Ge_1.5(PO₄)₃ solid electrolyte membrane is successfully fabricated through tape-casting. A high density of 3.28 g cm⁻³ of the membrane with a porosity of 4.5% has been achieved when it is sintered at 900°C for 11 h. The membrane shows a comparative ionic conductivity with that of the glass-ceramic pellets. The total ionic conductivity of the present membrane is 2.62 × 10^–4 S cm⁻¹ at room temperature, and it maintains a stable conductivity of 1.3 × 10^–4 S cm⁻¹ in a 0.5 M LiOH and 0.5 M Li₃PO₄ buffer solution, which can fully afford the requirements of the membrane used in lithium–air batteries.

Graphical Abstract

High-density thin LAGP membrane with comparative ionic conductivity has been successfully prepared by tape-casting, which can fully afford the essential requirements of using in Li–air battery.

KEYWORDS:

• Solid-state membrane
• conductivity
• Li transportation
• tape-casting

Disclosure statement

No potential conflict of interest was reported by the authors.