Antimony-based anode on aluminum current collector
An electrochemical battery is provided with an aluminum anode current collector and an antimony (Sb)-based electrochemically active material overlying the aluminum current collector. The Sb-based electrochemically active material may be pure antimony, Sb with other metal elements, or Sb with non-metal elements. For example, the Sb-based electrochemically active material may be one of the following: Sb binary or ternary alloys of sodium, silicon, tin, germanium, bismuth, selenium, tellurium, thallium, aluminum, gold, cadmium, mercury, cesium, gallium, titanium, lead, carbon, and combinations thereof. The aluminum current collector may additionally include a material such as magnesium, iron, nickel, titanium, and combinations thereof. In one aspect, the anode further composed of a coating interposed between the aluminum current collector and the Sb-based electrochemically active material. This coating may be a non-corrodible metal or a carbonaceous material. The cathode is may be composed of a number of different active materials including sodium-based Prussian Blue analogs.
1. An electrochemical battery with an aluminum anode current collector, the battery comprising:
a cathode including a sodium-ion active material;
a non-aqueous electrolyte;
an anode comprising:
an aluminum current collector; and,
an antimony (Sb)-based electrochemically active material overlying the aluminum current collector.
2. The battery of claim 1 wherein the non-aqueous electrolyte primarily comprises one or more carbonates selected from the group consisting of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate, in combination with a dissolved sodium salt selected from a group consisting of sodium hexafluorophosphate (NaPF 6 ), sodium perchlorate (N a ClO 4 ), sodium bis(trifluoromethane)sulfonamide (NaTFSI), sodium aluminate (NaAlO 2 ) and sodium tetrafluoroborate (NaBF 4 ).
3. The battery of claim 1 wherein the non-aqueous electrolyte primarily comprises a polymer host selected from the group consisting of polyvinylidene fluoride (PVDF), poly(vinylidene fluoride-co-hexafluoropropylene)/poly(methyl methacrylate) (PVDF-HFP), polyethylene oxide (PEO), polyacrylonitrile (PAN), poly(methyl methacrylate) (PMMA), or ionic liquids, in combination with a dissolved sodium salt selected from a group consisting of NaPF 6 , NaClO 4 , NaTFSI, NaAlO 2 , and NaBF 4 .
4. The battery of claim 1 wherein the non-aqueous electrolyte comprises an additive selected from the group consisting of fluorinated cyclic carbonates, fluorinated linear carbonates, and alkaline salts.
5. The battery of claim 1 wherein the cathode primarily comprises an electrochemically active material selected from the group consisting of sodium cobalt oxide (NaCoO 2 ), sodium manganese(IV) oxide (NaMnO 2 ), sodium nickel(II) oxide (NaNiO 2 ), sodium iron(III) phosphate (NaFePO 4 ), manganese(IV) oxide (MnO 2 ), vanadium(V) oxide (V 2 O 5 ), molybdenum trioxide (MoO 3 ), Prussian Blue analogues, sulfur, or active organics including electrically conducting polymers and oxocarbon salts.
6. The battery of claim 1 wherein the Sb-based electrochemically active material comprises a material selected from the group consisting of pure antimony, Sb with other metal elements, and Sb with non-metal elements.
7. The battery of claim 6 wherein the Sb-based electrochemically active material comprises a material selected from the group consisting of Sb binary or ternary alloys of sodium, potassium, silicon, tin, germanium, bismuth, selenium, tellurium, thallium, aluminum, gold, cadmium, arsenic, mercury, cesium, gallium, titanium, lead, carbon, sulfur, phosphor, metal oxides including tin oxide, germanium oxide, iron oxide and manganese oxide, or metal sulfides such as tin sulfide, iron sulfide, titanium sulfide, and molybdenum sulfide, and combinations thereof.
8. The battery of claim 1 wherein the aluminum current collector additionally comprises a material selected from the group consisting of magnesium, iron, nickel, titanium, and combinations thereof.
9. The battery of claim 1 wherein the anode further comprises:
a coating interposed between the aluminum current collector and the Sb-based electrochemically active material, the coating comprising a material selected from a group comprising a non-corrodible metal and a carbonaceous material.
10. The battery of claim 1 wherein the anode further comprises:
a polymer binder.
11. The battery of claim 1 wherein the anode further comprises:
a conductive additive selected from the group consisting of carbon black, graphite, graphene, carbon nanotubes (CNTs), and carbon nanofibers (CNFs).
12. The battery of claim 1 wherein the Al current collector has a structure selected from a group consisting of foil, plate, mesh, foam, or grid.