Ion exchange membrane-free alternating current fuel cell

Abstract

The invention relates to the field of fuel cells, and discloses an ion exchange membrane-free alternating current fuel cell comprising a reaction chamber, and a water-based electrolyte solution, a difunctional catalytic electrode and a transfer electrode which are arranged in the reaction chamber; the difunctional catalytic electrode alternately supplies a fuel and an oxidant to the difunctional catalytic electrode through an external pipeline. According to the invention, an isolating membrane with high cost is not needed, so that the system cost is greatly reduced; water is used as an ion transport carrier, so that the conductivity is the highest, the electric conduction of various ions can be realized, and the selectivity of the fuel is avoided; the reaction can be carried out at normaltemperature, and the safety of an electric reactor is high; due to the alternating current working characteristic, the problem that the catalytic material fails due to long-term working in a reductionor oxidation atmosphere can be avoided, the problem of electrode carbon deposition when a hydrocarbon fuel is adopted can also be avoided, and meanwhile, electric power operation such as voltage transformation can be conveniently realized by electric energy output in an alternating current form.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an AC fuel cell without an ion exchange membrane. Background technique [0002] A conventional fuel cell is usually composed of a cathode, an anode and an ion-conducting separator. This delicate structure also brings some limitations while ensuring that the device can realize the fuel cell reaction. The separator needs to be a dense film that can block air and hydrogen from contact, while still conducting ions. Common isolation membranes, such as proton exchange membranes, have much lower ionic conductivity than that of aqueous solutions, which greatly limits the speed of the reaction. At the same time, it is also a key component of the entire device, with high cost and limited life. Said to be the short board of the existing fuel cell. [0003] In addition, the cathode or anode is easily oxidized or reduced when exposed to the same atmosphere for a long time during the work...

AI Technical Summary

Problems solved by technology

Common isolation membranes, such as proton exchange membranes, have much lower ionic conductivity than that of aqueous solutions, which greatly limits the speed of the reaction. At the same time, it is also a key component of the entire device, with high cost and limited life. Said to be the short board of the existing fuel cell

[0003] In addition, the cathode or anode is easily oxidized or reduced when exposed to the same atmosphere for a long time during the working process; in addition, some fuel cells (alkaline fuel cells) can only work with pure oxygen, and carbon dioxide will appear when using air Poisoning and other issues; and solid oxide fuel cells often have to work normally at a temperature above 500 ° C, which brings great challenges to practical applications

[0004] In summary, currently known fuel cells are difficult to be applied on a large scale due to some common defects or individual defects. The present invention provides a new fuel cell form to overcome the above-mentioned general and individual defects defect

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