Air cathode tubes for rechargeable metal air batteries
Implementations and techniques are generally disclosed are generally described for providing a metal air batter comprising, a cathode tube included in the metal air battery, the cathode tube having a conductive outer surface and a hydrophobic inner surface configured to define a tube wall there between, wherein the tube wall includes polymeric material and an anode material that surrounds the cathode tube.
1. An apparatus, comprising:
a rechargeable metal air battery that includes a cathode tube wrapped in a fabric separator layer, wherein the cathode tube includes:
a conductive outer surface;
a hydrophobic inner surface;
a tube wall between the conductive outer surface and the hydrophobic inner surface, wherein an exterior surface of the tube wall is plated with a palladium (Pd)-based material; and
a polymeric material that includes pores therein configured to extend from the conductive outer surface into the Pd-based exterior surface of the tube wall.
2. The apparatus of claim 1 , wherein the polymeric material includes at least one of polytetrafluoroethylene or polyethylene.
3. The apparatus of claim 1 , wherein the tube wall includes conductive particles and a catalytic material embedded within the polymeric material.
4. The apparatus of claim 3 , wherein the catalytic material includes one or more of Ag, Pt, Pt—Ru, La 2 O 3 , Ag 2 O, and Fe.
5. The apparatus of claim 1 , wherein the hydrophobic inner surface includes an amorphous fluoropolymer.
6. An apparatus comprising:
a rechargeable metal air battery that includes:
cathode tubes electrically coupled together within rechargeable metal air battery, wherein at least one of the cathode tubes includes:
a conductive outer surface;
a hydrophobic inner surface;
a tube wall between the conductive outer surface and the hydrophobic inner surface, wherein an exterior surface of the tube wall is plated with a palladium (Pd)-based material; and
a polymeric material that includes pores therein configured to extend from the conductive outer surface into the Pd-based exterior surface of the tube wall;
a separator layer that includes a hydrophilic fabric saturated with an electrolyte; and
an anode material that surrounds the at least one of the cathode tubes.
7. The apparatus of claim 6 , wherein the polymeric material includes at least one of polytetrafluoroethylene or polyethylene.
8. The apparatus of claim 6 , wherein the tube wall includes conductive particles and a catalytic material embedded within the polymeric material.
9. The apparatus of claim 8 , wherein the catalytic material includes one or more of Ag, Pt, Pt—Ru, La 2 O 3 , Ag 2 O, and Fe.
10. The apparatus of claim 6 , wherein the hydrophobic inner surface includes an amorphous fluoropolymer.
11. The apparatus of claim 6 , wherein the cathode tubes are arranged as one or more linear arrays.
12. The apparatus of claim 6 , wherein the cathode tubes are arranged as one or more rectangular arrays.
13. An apparatus, comprising:
a rechargeable metal air battery that includes:
a cathode tube, wherein the cathode tube includes:
a conductive outer surface;
a hydrophobic inner surface;
a tube wall between the conductive outer surface and the hydrophobic inner surface, wherein an exterior of the tube wall is plated with a palladium (Pd)-based material; and
a polymeric material that includes pores therein configured to extend from the conductive outer surface into the Pd-based exterior of the tube wall; and
an anode material that surrounds the cathode tube.
14. The apparatus of claim 13 , wherein the polymeric material includes at least one of polytetrafluoroethylene or polyethylene.
15. The apparatus of claim 13 , wherein the tube wall includes conductive particles and a catalytic material embedded within the polymeric material.
16. The apparatus of claim 13 , wherein the anode material includes one or more of a Zn powder, a hydroxyl electrolyte, and a gel.
17. The apparatus of claim 13 , wherein the hydrophobic inner surface includes an amorphous fluoropolymer.
18. The apparatus of claim 15 , wherein the catalytic material includes one or more of Ag, Pt, Pt—Ru, La 2 O 3 , Ag 2 O, and Fe.
19. The apparatus of claim 13 , further comprising a separator layer between the cathode tube and the anode material.
20. The apparatus of claim 19 , wherein the separator layer includes a hydrophilic fabric.
21. The apparatus of claim 19 , wherein the separator layer includes a hydrophilic fabric saturated with an electrolyte.
22. The apparatus of claim 13 , wherein the polymeric material includes a hydrophilic pore configured to draw an electrolyte into the tube wall.
23. The apparatus of claim 13 , wherein the tube wall includes a composite of the polymeric material impregnated with conductive particles and a catalytic material.