Lithium-oxygen batteries with triplex Li⁺-selective solid membranes

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Lithium-oxygen batteries offer high theoretical energy density but face challenges with electrolyte stability and cycle life.
• Solid-state electrolytes are being explored to improve safety and performance of lithium-oxygen batteries.

Purpose of the Study:

• To propose and evaluate a novel lithium-oxygen battery system incorporating a triplex lithium-ion-selective solid membrane (LSSM).
• To investigate the performance characteristics and scalability potential of the proposed battery design.

Main Methods:

• Fabrication of an inorganic LSSM with a specific triplex (porous/dense/porous) structure using tape-casting.
• Electrochemical testing of the lithium-oxygen cell to assess rate-capability and cycling reversibility.

Main Results:

• The fabricated triplex-LSSM enabled a lithium-oxygen battery with promising rate-capability.
• The cell demonstrated good reversibility during repeated charge-discharge cycles.
• The triplex-LSSM architecture shows potential for enabling larger-scale battery system designs.

Conclusions:

• The triplex-LSSM is a viable component for advanced lithium-oxygen battery architectures.
• The demonstrated performance suggests that this solid membrane approach can overcome some limitations of current lithium-oxygen battery designs.
• The structural design of the LSSM offers a pathway for developing scalable and efficient energy storage systems.