Multilayered anode and associated methods and systems
AssigneeBoard of Regents, The University of Texas System
InventorsArumugam Manthiram, Brian Theodore Heligman, Karl Joseph Kreder, III, Kevin Scanlan
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Abstract
Described herein are multilayer composite foil materials, as well as methods of making and using multilayer composite foil materials. The composite foil materials can comprise different layers of different metals which may have differing activity toward an active metal, such as lithium. The different layers may allow the composite foil material to include layers that are more active towards the active metal, providing for electrochemical activity, and other layers that are less active towards the active metal, and serving as structural layers. The multilayer composite foils are useful as anodes of electrochemical cells, such as lithium ion cells.
Claims23
A composite foil material exhibiting a hierarchical structure, wherein the hierarchical structure comprises different regions of alternating first layers and second layers, comprising:
- a plurality of first layers comprising a first metal, which is a member selected from the group consisting of Al, Si, Zn, Ga, Ag, Cd, In, Sn, Sb, Au, Pb, Bi, and Mg;
- a plurality of second layers comprising a second metal, which is a member selected from the group consisting of Cu, Zn, Mg, Fe, Ni, Al, Zr, Hf, Nb, and Mo, wherein the hierarchical structure comprises from 8 to 512 first layers alternating with from 8 to 512 second layers, wherein individual layer thickness is between 0.05 μm to −2 μm, and has an interface density of between 0.5 and 20 μm−1, wherein at least some different regions of alternating first layers and second layers have different total thicknesses, different layer thicknesses, or different numbers of layers;
- an active metal, which is a member selected from the group consisting of lithium, sodium, potassium and magnesium;
- and
- wherein the active metal is less reactive toward the second metal than the first metal.
A method for preparing a composite foil material exhibiting a hierarchical structure comprising different regions of alternating first layers and second layers,
- providing a composite foil material comprising:
- a plurality of first layers comprising a first metal, which is a member selected from the group consisting of Al, Si, Zn, Ga, Ag, Cd, In, Sn, Sb, Au, Pb, Bi, and Mg;
- and
- a plurality of second layers comprising a second metal, which is a member selected from the group consisting of Cu, Zn, Mg, Fe, Ni, Al, Zr, Hf, Nb, and Mo, wherein the hierarchical structure comprising from 8 to 512 first layers alternate with from 8 to 512 second layers, wherein individual layer thickness is between 0.05 μm to 2 μm, wherein the hierarchical structure comprises different regions of alternating first layers and second layers, and has an interface density of between 0.5 and 20 μm−1, wherein at least some different regions of alternating first layers and second layers have different total thicknesses, different layer thicknesses, or different numbers of layers;
- and
- subjecting the composite foil material to an electrochemical alloying process with an active metal, which is a member selected from the group consisting of lithium, sodium, potassium and magnesium;
- and wherein the active metal is less reactive toward the second metal than the first metal.
Dependencies are inferred from the claim text.