AC fuel cell without ion exchange membrane

Abstract

The invention relates to the field of fuel cells, and discloses an AC fuel cell without an ion exchange membrane, including a reaction chamber, a water-based electrolyte disposed in the reaction chamber, a bifunctional catalytic electrode and a transfer electrode, and the bifunctional catalytic electrode passes through The external pipeline supplies fuel and oxidizer alternately. The present invention does not need to use a high-cost isolation membrane, which greatly reduces the system cost; water is used as an ion transport carrier, which has the highest electrical conductivity, and can realize the electrical conduction of various ions at the same time, avoiding the selectivity of fuel; the reaction can be carried out at room temperature , the safety of the stack is high; due to its AC working characteristics, it can avoid the problem of catalytic material failure due to long-term work in a reducing or oxidizing atmosphere, and can also avoid the problem of electrode carbon deposition when using hydrocarbon fuels. At the same time, the electric energy output in AC form , It is very convenient to realize power operation such as voltage transformation.

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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