Air electrode comprising a multi-layered structure with expanded triple-phase boundaries and manufacturing method thereof

Air electrode with expanded triple-phase boundaries via a sandwich-structured electron and ion conductor layer

This technology is an electrode architecture for lithium-air secondary batteries that expands triple-phase boundaries and optimizes reaction pathways (solution and surface mechanisms) by sandwiching an electron-conductive material layer (first conductor layer) and a lithium-ion conductive material layer (second conductor layer) above and below a metal foam current collector.

Conventional lithium-air secondary batteries suffer from low oxygen reduction/oxidation reaction efficiency due to limited triple-phase boundaries and uneven reactant supply, which significantly falls short of theoretical energy density and limits discharge capacity and cycle life.

By introducing a multi-layered structure in which layers containing electron-conductive materials (such as LiI) and lithium-ion conductive materials (such as Li3N) are sequentially stacked around a metal foam current collector, this technology provides a distinct competitive advantage in the metal-air battery market.

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Key Features:

• Metal foam electrode current collector for a lithium-air secondary battery composed of a lithium anode, a separator, and an air electrode
• Conductor layers disposed on the top and bottom of the current collector to form a multi-layered structure with the electrode current collector
• Configuration where the conductor layers consist of a first conductor layer, which is an electron-conductive material layer, and a second conductor layer, which is a lithium-ion conductive material layer
• Air electrode that expands triple-phase boundaries by sandwiching electron and ion conductor layers above and below a metal foam

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