Abstract: The present invention provides a membrane electrode assembly of a fuel cell, comprising a gas diffusion layer, a microporous layer, a catalytic layer, and an electrolyte membrane that are sequentially stacked. In the direction of an air flow path, the thickness of the microporous layer decreases progressively, the thickness of the catalytic layer increases progressively, and the total thickness of the microporous layer and the catalytic layer keeps consistent. The present application also provides a preparation method for the membrane electrode assembly of a fuel cell. The membrane electrode assembly of a fuel cell provided in the present application can balance water content of a gas inlet area and a gas outlet area of the fuel cell, and finally improves the stability of the fuel cell at different temperatures and humidity levels, thereby implementing functions such as improving the durability and decreasing a catalyst load.

Abstract: The present invention provides a microporous layer structure of a fuel cell, comprising: a microporous layer having high water vapor transmission rate and a microporous layer having low water vapor transmission rate that are sequentially stacked. In the direction of an air flow path, the thickness of the microporous layer having high water vapor transmission rate increases progressively, the thickness of the microporous layer having low water vapor transmission rate decreases progressively, and the total thickness of the microporous layer structure keeps consistent. At an air inlet, the thickness of the microporous layer having high water vapor transmission rate is smaller than that of the microporous layer having low water vapor transmission rate. At an air outlet, the thickness of the microporous layer having high water vapor transmission rate is greater than that of the microporous layer having low water vapor transmission rate.

Abstract: The present invention provides a membrane electrode assembly of a fuel cell, comprising a gas diffusion layer, a microporous layer, a catalytic layer, and an electrolyte membrane that are sequentially stacked. In the direction of an air flow path, the thickness of the microporous layer decreases progressively, the thickness of the catalytic layer increases progressively, and the total thickness of the microporous layer and the catalytic layer keeps consistent. The present application also provides a preparation method for the membrane electrode assembly of a fuel cell. The membrane electrode assembly of a fuel cell provided in the present application can balance water content of a gas inlet area and a gas outlet area of the fuel cell, and finally improves the stability of the fuel cell at different temperatures and humidity levels, thereby implementing functions such as improving the durability and decreasing a catalyst load.

Abstract: A control system for a direct alcohol fuel cell, comprising: a fuel tank; a fuel cell stack; a pump feeding the fuel in the fuel tank to the fuel cell stack; a switching mechanism connecting the pump selectively with the fuel and air in the fuel tank; and a control unit switching the switching mechanism to connect the pump with the air when stopping power generation of the fuel cell stack. When the generation of the fuel cell stack is stopped, feeding of the fuel to the fuel cell stack is stopped and the air is supplied to the fuel cell stack thereby pushing out the remaining fuel.

Abstract: A control system for a direct alcohol fuel cell, comprising: a fuel tank; a fuel cell stack; a pump feeding the fuel in the fuel tank to the fuel cell stack; a switching mechanism connecting the pump selectively with the fuel and air in the fuel tank; and a control unit switching the switching mechanism to connect the pump with the air when stopping power generation of the fuel cell stack. When the generation of the fuel cell stack is stopped, feeding of the fuel to the fuel cell stack is stopped and the air is supplied to the fuel cell stack thereby pushing out the remaining fuel.