Steam supply passive type direct methanol fuel cell with catalytic combustion type heat supplying

Abstract

The invention discloses a steam supply passive type direct methanol fuel cell with catalytic combustion type heat supplying. The steam supply passive type direct methanol fuel cell comprises a cell reaction unit and a porous sintering plate in the cell reaction unit, wherein the cell reaction unit is sequentially connected with a steam supplying unit, a pervaporation membrane, a catalytic combustion heat supplying unit, an oxygen buffering unit, a raw material catalytic combustion unit and a sealing bottom cover. A catalytic combustion method is adopted for supplying heat to the steam supply passive type direct methanol fuel cell, the catalytic combustion has the characteristics of high energy, high efficiency, high reaction rate, and the like, and the reaction is easily controlled, reaction heat energy provides energy for the methanol phase change, high-temperature methanol fuel is provided for cell discharge, and further the output power of the cell is increased; meanwhile, the recycling of a catalytic combustion product ensures that pure methanol can be possibly supplied to cell reaction, and thus the energy density of the cell is greatly increased, and the stable long-term operation of the cell is favorably realized.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a steam-supplied passive direct methanol fuel cell for catalytic combustion and heat supply. Background technique [0002] Direct Methanol Fuel Cell (DMFC) is a kind of fuel cell with methanol as raw material. DMFC has the advantages of high energy density, convenient manufacture, and easy availability of fuel. It has always been the focus of attention. At present, the research on DMFC has been focusing on liquid In the field of methanol as fuel, there is a serious problem of methanol penetration in DMFC supplied in liquid state, which not only causes a lot of waste of raw materials, leads to low energy utilization, but also seriously weakens the performance of the battery, which has become a bottleneck hindering the improvement of battery performance . [0003] The electrode and cell reactions of a direct methanol fuel cell are as follows: [0004] The anode reaction is CH ...

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Problems solved by technology

[0007] Providing fuel for DMFC in the form of steam can effectively reduce the penetration of methanol and significantly improve the utilization efficiency of methanol. At present, the main way to provide steam for batteries is to use external heating equipment to directly heat raw materials to generate steam. This method will not only cause large The parasitic loss of the battery system seriously reduces the overall performance of the battery system. Moreover, the stability of the battery system has high requirements on the electronic control device, which increases the cost of battery manufacturing and the difficulty of operation. Therefore, there is an urgent need for efficient, green, and simple steam supply method

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