New type direct methanol fuel cell

Abstract

Without use of proton exchange membrane, the disclosed fuel battery includes shell of battery. Through welding point, the shell of battery is connected to outer electrode inside the shell. An air chamber is setup between the shell and the outer electrode. Inner electrode is setup at inner side of the outer electrode. Chamber of gel mobile phase is setup between inner electrode and outer electrode. An air chamber is setup at inner side of the inner electrode. Using gel mobile phase of possessing higher capability of conducting protons and electrons to replace solution mobile phase of liquid phase electrolyte of vitriol and methanol popular used currently, the invention solves issue of methanol leakage radically so as to lower poisoning cathode and anode catalyst of direct methanol fuel battery (DMFB). The invention raises performance of fuel battery, lowers manufacturing cost, and promotes progress of industrialization of DMFB.

Description

Technical field: [0001] The invention relates to a methanol-connected 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 is expensive and 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 DMFC. At the same time, methanol seeps to the cathode and reacts on the cathode, resulting in poisoning of the cathode cataly...

AI Technical Summary

Problems solved by technology

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 is expensive and 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 DMFC. At the same time, methanol seeps to the cathode and reacts on the cathode, resulting in poisoning of the cathode catalyst and greatly shortening battery life. The second is that methanol oxidizes slowly on the surface of the anode, and carboxyl species such as CO that are strongly adsorbed on the surface of the anode are produced 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 completely solved

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