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US 12,544,833 B2Granted
Refractory alloyed iron-based redox active foams for iron-air batteries, fabricating methods and applications of same
AssigneeNorthwestern University
InventorsJacob Benjamin Mack, Samuel Mark Pennell, David C. Dunand
Life of this patent
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Abstract
This invention in one aspect relates to an iron-based foam usable for an electrochemical device, comprising a composition comprising iron and a refractory element processed to form the iron-based foam having a hierarchical porous structure with self-assembled channels for gas flow reactions and internal space to accommodate volumetric changes on oxidation.
Claims19
An iron-based foam usable for an electrochemical device, comprising:
- a composition comprising iron (Fe) and a refractory element processed to form the iron-based foam having a hierarchical porous structure with self-assembled channels for gas flow reactions and internal space to accommodate volumetric changes on oxidation,
- wherein the refractory element comprises molybdenum (Mo), wherein Mo is in a range of about 15-30 at %, and Fe is in balance in the iron-based foam.
An iron-based foam usable for an electrochemical device, comprising:
- a composition comprising iron (Fe) and a refractory element processed to form the iron-based foam having a hierarchical porous structure with self-assembled channels for gas flow reactions and internal space to accommodate volumetric changes on oxidation,
- wherein the refractory element comprises molybdenum (Mo);
- and
- wherein the iron-based foam has three distinct phases:
- (i) α-Fe(Mo) solid solution with a BCC crystal structure, (ii) Fe-rich p-phase whose composition is close to μ-Fe3Mo2, and (iii) mixed Fe—Mo carbide including Fe3Mo3C with a FCC crystal structure.
2 more elements
An iron-based foam usable for an electrochemical device, comprising:
- a composition comprising iron (Fe) and a refractory element processed to form the iron-based foam having a hierarchical porous structure with self-assembled channels for gas flow reactions and internal space to accommodate volumetric changes on oxidation,
- wherein the refractory element comprises tungsten (W), tantalum (Ta), or niobium (Nb).
Dependencies are inferred from the claim text.