High-temperature Proton Exchange Membrane Fuel Cell Membrane Electrode Assembly And Preparation

Proton exchange membrane fuel cell?PEMFC?,as a new type of clean energy,has the advantages of high energy conversion utilization ratio,high specific power,high energy density and harmless environment,which can be started quickly at relatively low operating temperature to achieve stable and efficient work in a long time.The electrolyte of proton exchange membrane fuel cell is a thin solid-state proton exchange membrane,this kind of membrane material can reduce the volume of the mobile power supply and portable power supply significantly,the use is wide,the foreground is bright,has been the research hotspot of the scholars.High-temperature proton exchange membrane fuel cell is a proton exchange membrane fuel cell which is operating at a temperature greater than 120 ?,which improves the working temperature of the battery,not only helps to enhance the co capability of the battery,but also weakens the adsorption capacity of CO on PT Catalysts,and promotes the reaction rate of the battery's anode The heat released by the fuel chemical energy is fully utilized to improve the battery performance.Therefore,the research and development of high temperature proton exchange membrane fuel cell has important application value and research value.At present,although many scholars have paid attention to the high temperature proton exchange membrane,but there are still some problems,such as poor proton conductivity,proton exchange membrane and catalyst is expensive,low catalyst efficiency,restricting the development of proton exchange membrane fuel cell.In this paper,a new type of polytetrafluoroethylene / phosphomolybdate composite membrane,PTFE/(PMo₁₂O₄₀)X-?PO-OH?Y film,was developed by using the proton exchange membrane of proton exchange membrane fuel cell as the starting point.The composite film was composed of polytetrafluoroethylene and Phosphomolybdic acid and other raw materials,with cheaper than ever before the characteristics of easy to use,with nickel mesh and carbon fiber paper to do high temperature proton exchange membrane fuel cell membrane electrode.In this paper,a high temperature proton exchange membrane fuel cell evaluation device is designed.The evaluation device is mainly used to evaluate the performance of high temperature proton exchange membrane fuel cell with power density of 1 10 w.Design drawings,and the design of the various parts of the explanation.According to this design,a high temperature proton exchange membrane fuel cell evaluation device is prepared,and the design scheme is found in the preparation process,so the design scheme is improved.This paper describes in detail the design of the evaluation device and the preparation process,pointing out the design and preparation of the shortcomings.Finally,the POM / SiO₂ / POx pseudo-liquid structure solid electrolyte has been successfully designed and fabricated.After analysis,the material can achieve proton conductivity of 0.12 S / cm at 380 ° C.After heating at 320 ° C for 1000 h,there was no loss of conductivity of the material.The "pseudo-liquid phase" mechanism of this material increases the proton conductivity where the protons diffuse between the polyphosphoric acid solid solution and the phosphomolybdic acid surface.This provides a new way to develop high temperature solid electrolyte.