A liquid fuel battery is described, having a vented case, an internal fuel chamber, and a plurality of substantially planar vertically stacked battery elements having separated fuel-sides and air sides. Such sides are separated by a series of anodic and cathodic seals. In one embodiment, a cathode c
A liquid fuel battery is described, having a vented case, an internal fuel chamber, and a plurality of substantially planar vertically stacked battery elements having separated fuel-sides and air sides. Such sides are separated by a series of anodic and cathodic seals. In one embodiment, a cathode contains doped carbon nanofibers and may be treated with polytetrafluoroethylene or another hydrophobic material. An anode current collector and/or cathode current collector may contain perforated metal, including metal mesh. Battery elements may be U-shaped to maximize the efficiency of the air-fuel interaction. The cathode is active for oxygen reduction and inactive for fuel oxidation.
대표청구항▼
1. A liquid fuel battery (10) comprising: a case (100) having at least one wall (102) defining an interior volume (120), and reversibly closable vents (104) in the wall (102) placing at least a portion of the interior volume (120) in reversible fluid communication with an external atmosphere;a refil
1. A liquid fuel battery (10) comprising: a case (100) having at least one wall (102) defining an interior volume (120), and reversibly closable vents (104) in the wall (102) placing at least a portion of the interior volume (120) in reversible fluid communication with an external atmosphere;a refillable fuel chamber (130) and a fuel port (132) further comprising a combined fuel filling port and reaction product removal port, at least partially within the interior volume (120) in fluid communication with at least one of a plurality of substantially planar vertically stacked battery elements (400) having at least one peripheral edge (402) having a fuel-side section (404) and an air-side section (406);the battery elements (400) comprising at least an anode collector assembly (420) having a anode current collector (422) in fluid communication with the fuel chamber (130) on the fuel-side section (404) and sealed from an ambient atmosphere on the air-side section (406) by an anodic air-side seal (424), an anode (430) in fluid communication with the fuel chamber (130) on the fuel-side section (404) and sealed from an ambient atmosphere on the air-side section (406) by the anodic air-side seal (424), an electrically nonconductive separator (440), a cathode (450) porous to air in fluid communication with an ambient atmosphere on the air-side section (406) and a cathode collector assembly (460) having a cathode current collector (462) in fluid communication with an ambient atmosphere on the air-side section (406) and sealed from the fuel chamber (130) on the fuel-side section (404) by a cathodic fuel-side seal (464); and wherein all reaction products are stored in a common volume with liquid fuel in the refillable fuel chamber (130). 2. The device according to claim 1, wherein the battery elements (400) are stacked to form a battery element stack (500) in the order of the anode collector assembly (420), the anode (430), the separator (440), the cathode (450), and the cathode collector assembly (460). 3. The device according to claim 2, wherein the battery (10) comprises a plurality of adjacent battery element stacks (500) each separated from an adjacent battery element stack (500) by a non-porous electrically conductive interconnect (410) electrically connected with each battery element stack (500). 4. The device according to claim 1, wherein a collector selected from the group of collectors consisting of the anode current collector (422) and the cathode current collector (462) further includes an electrically conductive mesh-. 5. The device according to claim 1, wherein the cathode (450) comprises doped carbon nanofiber. 6. The device according to claim 5, wherein the cathode (450) comprises polytetrafluoroethylene. 7. The device according to claim 1, wherein the cathode (450) is active for oxygen reduction and not active for fuel oxidation. 8. The device according to claim 1, wherein the fuel chamber (130) comprises a fuel selected from the group of fuels consisting of an alcohol, a carboxyl species, a formate species, soluble hydrides and mixtures thereof. 9. The device according to claim 8, wherein the alcohol is selected from the group of alcohols consisting of glycerol, ethanol, methanol and mixtures thereof. 10. The device according to claim 1, wherein at least one of the collectors selected from the group of collectors consisting of the anode current collector (422) and the cathode current collector (462) comprises a perforated metal. 11. The device according to claim 1, wherein at least one of the collectors selected from the group of collectors consisting of the anode current collector (422) and the cathode current collector (462) comprises a metal plate having channels. 12. The device according to claim 1, wherein the case vents (104) are reversibly occludable by a vent slider (200) having slider fenestrations (220). 13. The device according to claim 1, wherein the fuel chamber (130) further comprises a densitometer. 14. The device according to claim 1, wherein at least one of the battery elements (400) consisting of the anode collector assembly (420), the anode (430), the cathode (450), and the cathode collector assembly (460) are U-shaped. 15. The device according to claim 1, wherein the refillable fuel chamber (130) is filled with a liquid fuel consisting of ethanol.
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이 특허에 인용된 특허 (5)
Cisar Alan J. ; Weng Dacong ; Murphy Oliver J., Fuel cell system for low pressure operation.
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