A Li-O₂/air battery using an inorganic solid-state air cathode

Area of Science:

• Electrochemistry
• Materials Science
• Energy Storage

Background:

• Conventional lithium-oxygen (Li-O2) batteries face challenges with electrolyte instability and decomposition.
• Solid-state electrolytes offer potential solutions to overcome these limitations.

Purpose of the Study:

• To fabricate and evaluate a Li-O2/air battery utilizing an inorganic solid-state air cathode.
• To investigate the electrochemical performance and reaction products under different oxygen conditions.

Main Methods:

• Fabrication of a Li-O2/air battery with a "(-) lithium (Li) anode|organic anolyte + inorganic catholyte|solid-state cathode (+)" configuration.
• Utilized a Li-ion conductive solid-state electrolyte: Li1.3Al0.3Ti1.7(PO4)3.
• Tested battery performance under pure O2 and ambient air.

Main Results:

• The inorganic solid-state electrolyte demonstrated stability during cycling, avoiding decomposition issues.
• A porous air cathode facilitated efficient O2 transport.
• Achieved high capacities of 14192 mA h g(-1) (pure O2) and 7869 mA h g(-1) (ambient air).

Conclusions:

• The developed Li-O2/air battery with an inorganic solid-state air cathode shows promising electrochemical performance.
• The stable electrolyte and efficient cathode design contribute to high capacity and potential for practical use.