Dual-electrode plates of fuel cell

Abstract

The invention relates to a plate for a fuel battery, which belongs to the field of fuel batteries. A feeding main channel and a discharging main channel penetrating an anode plate, a cathode plate and a cooling plate are respectively communicated with flow channels of respective plates through deviation through holes. The deviation through holes penetrate the plates, one end of each of the deviation through holes is communicated with the feeding main channel or the discharging main channel, and the other end is communicated with the flow channels on the plates. The plates can be used for manufacturing fuel batteries with different flow field structures of small power to large power, can prolong the service life of membrane electrodes of fuel batteries, and are suitable for the scale production of fuel batteries.

Description

technical field [0001] The invention relates to a fuel cell polar plate, which belongs to the field of fuel cells. technical background [0002] With the increasing shortage of natural resources and the gradual exhaustion of mineral energy such as oil, people are facing an increasingly severe energy crisis. In addition, the increasingly serious environmental pollution problem also forces people to look for cleaner energy sources. A fuel cell is an electrochemical device that directly converts chemical energy into electrical energy in an efficient and environmentally friendly manner. The theoretical conversion rate can reach more than 80%. It is a green energy source that can simultaneously solve two world problems of energy saving and environmental protection. Countries attach great importance to fuel cells, which promotes the rapid development of fuel cells. Proton exchange membrane fuel cell (PEMFC) has the advantages of light weight, compact structure, easy drainage, hi...

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Problems solved by technology

Studies have shown that the proton exchange membrane is very easy to adsorb metal cations and cause a decrease in conductivity, especially after the adsorption of ferric ions, the loss of the conductivity of the proton exchange membrane is greater than that of the adsorption of divalent nickel ions and divalent copper ions (M.J.Kelly, G. Fafilek, J.O. Besenhard, H. Kronberger, G.E. Nauer. J. Power Sources 145 (2005) 249-252)

During the long-term use of fuel cells, corrosion of metal materials is inevitable, and the metal cations produced by corrosion enter the proton exchange membrane, which will increase the internal resistance of the battery and reduce the performance of the battery.

In addition, the H that may be generated in the battery 2 o 2 Decomposition produces OH or 00H free radicals to attack the end group of the polymer segment in the proton exchange membrane, reducing the chemical stability of the proton exchange membrane (D.E.Curtin, R.D.Lousenberg, T.J.Henry, P.C.Tangeman, M.E.Tisack.J.Power Sources 131(2004)41-48), while the presence of metal ions aggravates the degradation rate of the proton exchange membrane (W.Schmittinger, A.Vahidi.J.PowerSources 180(2008)1-14), which is not conducive to the long-term use of fuel cells

Considering the assembly of the battery stack, the structure of the bridge plate is very unfavorable to the assembly of the fuel cell, and it is difficult to realize an automated assembly line

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