Integrated high-temperature formic acid fuel cell

Abstract

The invention discloses an integrated high-temperature formic acid fuel cell. The cell comprises a first end plate, an anode plate, a high-temperature membrane electrode, a cathode plate and a second end plate which are stacked in sequence, a reaction substrate is arranged between the first end plate and the anode plate, a flow channel is engraved in the surface of the reaction substrate, and the flow channel is filled with a catalyst; formic acid steam enters the flow channel and then is in contact with the catalyst to generate hydrogen which is used as a reaction gas of the fuel cell. A formic acid cracking hydrogen production reactor and a high-temperature proton exchange membrane fuel cell are integrated together, so that the number of devices is reduced, a formic acid reforming fuel cell system is simplified, and the specific power of the system can be effectively improved. Formic acid cracking hydrogen production is an endothermic reaction, the hydrogen fuel cell releases heat during discharging, heat generated by a fuel cell membrane electrode can be directly transmitted to a reaction substrate for formic acid cracking hydrogen production through an anode plate, heat is provided for the hydrogen production reaction, and the thermal efficiency and dynamic response of the system are improved.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to an integrated high-temperature formic acid fuel cell. Background technique [0002] There are two types of formic acid fuel cells: one is the direct formic acid fuel cell, that is, formic acid is directly discharged by electrochemical oxidation; but the battery has large polarization and low power density, so it can only be applied to low-power discharge processes. The other is the formic acid reforming fuel cell, that is, the formic acid is first converted into hydrogen, and then the hydrogen is passed through to generate an electrochemical oxidation discharge, which can be applied to the high-power discharge process. In the existing formic acid reforming fuel cell, hydrogen is usually produced by the formic acid cracking hydrogen production reactor, and then the hydrogen is passed into the low-temperature proton exchange membrane fuel cell (LT-PEMFC) stack. The operating temperature ...

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Problems solved by technology

The operating temperature of the formic acid cracking hydrogen production reactor is 150°C-200°C, and the operating temperature of the low-temperature proton exchange membrane fuel cell (LT-PEMFC) stack is 60°C-80°C. Since the operating temperatures of the two are inconsistent, the hydrogen produced It needs to be cooled first and then fed into the stack; and the formic acid cracking hydrogen production reactor is usually located outside the stack, involving many devices, which makes the whole formic acid reforming fuel cell stack very complicated, and the specific power and thermal efficiency of the system are very high. Low

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