Sol-gel mobile phase of direct methanol fuel cell and preparation method

Abstract

A method for preparing sol-gel flow phase of direct methanol fuel cell includes using metal organic compound as presoma and methanol in flow phase as scattering media, adding sulphuric acid and water to form sol by hydrolyzation and poly-condensation reactions, doping hetero-acid and conductive polymer as well as metal powder to form gel flow phase.

Description

Technical field: [0001] The invention relates to a mobile phase (flux phase) of a direct methanol fuel cell. Background technique: [0002] Direct Methanol Fuel Cell (DMFC) has the advantages of low energy consumption, high energy density, abundant sources of methanol, low price, simple system, convenient operation, low noise, etc. Promising chemical power sources have attracted widespread attention. At present, the development of direct methanol fuel cells faces two key problems: one is that the solid electrolyte membrane widely used in direct methanol fuel cells is the Nafion membrane originally designed for hydrogen-oxygen proton exchange membrane fuel cells, which has obvious methanol leakage ( crossover) phenomenon, methanol directly penetrates the Nafion membrane and is lost, resulting in a large loss of methanol fuel and a decrease in the power density of the DMFC. At the same time, methanol seeps into the cathode and reacts on the cathode, resulting in poisoning of ...

AI Technical Summary

Problems solved by technology

At present, the development of direct methanol fuel cells faces two key problems: First, the solid electrolyte membrane widely used in direct methanol fuel cells is the Nafion membrane originally designed for hydrogen-oxygen proton exchange membrane fuel cells, which has obvious methanol leakage ( crossover) phenomenon, methanol directly penetrates the Nafion membrane and is lost, resulting in a large loss of methanol fuel and a decrease in the power density of the DMFC. At the same time, methanol seeps into the cathode and reacts on the cathode, causing the cathode catalyst to be poisoned and greatly shortening the battery life; The oxidation rate of the anode surface is slow, and carboxyl species such as CO are strongly adsorbed on the anode surface during the oxidation process, which poisons the electrode and reduces the activity of the electrode.

Although the leakage resistance to methanol has been greatly improved, the leakage problem of methanol has not been solved