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Liquid anode electrochemical cell

a liquid anode and electrochemical cell technology, applied in the field of electrochemical cells, can solve the problems of limited capacity of all batteries, limited number of charge-discharge cycles of rechargeable batteries, irreversible consumption of electrochemical devices by batteries, etc., and achieve the effect of higher voltage and power

Inactive Publication Date: 2007-11-22
SRI INTERNATIONAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Batteries are electrochemical devices that irreversibly consume the reagents while supplying current to an external circuit.
The major limitation of all batteries is their limited capacity, usually expressed in Ampere-hours.
Rechargeable batteries have a limited number of charge-discharge cycles and thus eventually fail.
Fuel cells do not have such disadvantages as limited capacity and a limited number of charge-discharge cycles.
A major disadvantage of conventional fuel cell design is that the electrode reactions proceed using an inefficient three-phase boundary.

Method used

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Embodiment Construction

[0025] Before describing the present invention in detail, it is to be understood that this invention is not limited to specific fuels, materials, or device structures, as such may vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.

[0026] It must be noted that, as used in this specification and the appended claims, the singular forms “a,”“an,” and “the” include both singular and plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “an outlet” includes a plurality of outlets as well as a single outlet, reference to “an inlet” includes a plurality of inlets as well as single inlet, and the like.

[0027] The present invention introduces electrochemical devices for electrochemical energy conversion, which are believed to have two-phase reaction zones. A two-phase reaction zone for oxidation reactions is established by using a liquid a...

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Abstract

An electrochemical cell is provided which has a liquid anode. Preferably the liquid anode comprises molten salt and a fuel, which preferably has a significant elemental carbon content. The supply of fuel is preferably continuously replenished in the anode. Where the fuel contains or pyrolizes to elemental carbon, the reaction C+2O2−→CO2+4e− may occur at the anode. The electrochemical cell preferably has a solid electrolyte, which may be yttrium stabilized zirconia (YSZ). The electrolyte is connected to a solid or liquid cathode, which is given a supply of an oxidizer such as air. An ion such as O2− passes through the electrolyte. If O2− passes through the electrolyte from the anode to the cathode, a possible reaction at the cathode may be O2+4e−→2O2−. The electrochemical cell of the invention is preferably operated as a fuel cell, consuming fuel and producing electrical current.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation of U.S. patent application Ser. No. 11 / 134,555, filed May 19, 2005, which claims priority under 35 U.S.C. § 119(e)(1) to Provisional U.S. Patent Application Ser. No. 60 / 572,900, filed May 19, 2004. The disclosures of which are incorporated by reference in their entirety.TECHNICAL FIELD [0002] This invention relates generally to electrochemical cells, and specifically to electrochemical cells capable of operation as fuel cells, using directly fuels other than hydrogen. BACKGROUND [0003] A typical device for direct (one-step) conversion of chemical energy into electricity utilizes fuel and oxidizer as reagents. Both reagents may be in gas, liquid, or solid (including paste) forms. [0004] Batteries are electrochemical devices that irreversibly consume the reagents while supplying current to an external circuit. Rechargeable batteries are devices that reversibly consume the reagents, such that the initial ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01M2/02H01M8/10H01M4/86H01M4/90H01M8/00H01M8/04H01M8/12H01M8/18H01M8/22H01M8/24
CPCH01M4/8626Y02B90/16H01M8/1009H01M8/1233H01M8/1253H01M8/143H01M8/22H01M8/225H01M8/2455H01M2004/8684H01M2008/1293H01M2008/147H01M2250/405Y02E60/521Y02E60/525Y02E60/526H01M8/086Y02B90/10Y02E60/50Y02P70/50
Inventor LIPILIN, ALEXANDER S.BALACHOV, IOURI I.DUBOIS, LAWRENCE H.SANJURJO, ANGELMCKUBRE, MICHAEL C.CROUCH-BAKER, STEVENHORNBOSTEL, MARC D.TANZELLA, FRANCIS LOUIS
Owner SRI INTERNATIONAL
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