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US 9,178,255 B2Granted
Lithium-air cells incorporating solid electrolytes having enhanced ionic transport and catalytic activity
AssigneeUniversity of Dayton
InventorsBinod Kumar, Jitendra Kumar
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Abstract
Liquid-free lithium-air cells are provided which incorporate a solid electrolyte having enhanced ionic transport and catalytic activity. The solid electrolyte is positioned between a lithium anode and an oxygen cathode, and comprises a glass-ceramic and/or a polymer-ceramic electrolyte including a dielectric additive.
Claims21
A liquid-free rechargeable lithium-air cell comprising:
- a lithium anode an anode comprising a lithium metal, at which oxidation of lithium metal to lithium ions occurs during discharge cycles of the lithium-air cell;
- a porous cathode at which reduction of oxygen and formation of lithium oxide or lithium peroxide occur during the discharge cycles of the lithium-air cell, the porous cathode comprising a carbon material and at least one of
- a lithium-ion conducting glass or a lithium-ion conducting glass-ceramic material;
- and
- a lithium-ion conducting solid electrolyte separating said lithium anode and said porous cathode, the lithium-ion conducting solid electrolyte comprising a glass-ceramic membrane, the glass-ceramic membrane comprising a glass-ceramic matrix and a dielectric phase of Li20 in the glass-ceramic matrix, the glass-ceramic matrix selected from lithium-aluminum-germanium phosphate (LAGP) or lithium-aluminum-titanium phosphate (LATP), wherein said glass-ceramic membrane contains from 0.01 wt % to about 5 wt % Li2O dielectric phase, based on the total weight of the glass-ceramic membrane.
2 more elements
A liquid-free lithium-air cell comprising:
- a lithium anode an anode comprising a lithium metal at which oxidation of lithium metal to lithium ions occurs during discharge cycles of the lithium-air cell;
- a porous cathode at which reduction of oxygen and formation of lithium oxide or lithium peroxide occur during the discharge cycles of the lithium-air cell, the porous cathode comprising from 70 wt. % to 95 wt. % lithium-aluminum germanium phosphate (LAGP) and from 5 wt. % to 30 wt. % of a carbon material;
- and
- a solid electrolyte separating said lithium anode and said porous cathode, the solid electrolyte comprising a glass-ceramic membrane, wherein said glass-ceramic membrane comprises a glass-ceramic matrix and a dielectric phase of Li2O particles in the glass-ceramic matrix, the glass-ceramic membrane containing from 0.01 wt % to 5 wt % dielectric phase, based on the total weight of the glass-ceramic membrane, and
- wherein the lithium-air cell is completely free of liquid components.
2 more elements
Dependencies are inferred from the claim text.