Self-suction microfluid fuel cell based on paper-wrapped electrode

Abstract

The invention provides a self-suction microfluid fuel cell based on a paper-wrapped electrode. The cell comprises a liquid storage tank, a paper-wrapped electrode and an absorption tank which are sequentially arranged from top to bottom, the paper-wrapped electrode comprises an anode and a cathode, the anode and the cathode are attached to each other, graphite cores are arranged in the anode and the cathode, and the outer wall surfaces of the anode and the cathode are coated with porous filter paper. The anode comprises a main body part, one side, far away from the cathode, of the anode main body part extends to form a comb tooth part, the cathode and the anode have the same structures, the extension direction of the comb tooth part on the cathode is opposite to that of the comb tooth parton the anode, the outer wall surfaces of the comb tooth parts of the anode and the cathode are coated with catalyst layers, and the catalyst layers are arranged inside the porous filter paper. The porous filter paper on the outer vertical surface of the paper-wrapped electrode main body part is attached to the high-conductivity electrolyte to form an ion motion channel in the fuel cell, so that fuel diffusion is effectively controlled, parasitic current is prevented from being generated, the distance between the cathode and the anode is reduced, an ion motion path is shortened, and the internal resistance of the fuel cell is reduced.

Description

Technical field [0001] The present invention relates to the field of fuel cell technology, and more particularly to a self-suction microfluidic fuel cell based on a paper bag electrode. Background technique [0002] The fuel cell is a power generation device having a chemical energy having a fuel into an electrical energy, and the principle of fuel cell is an electrochemical device, which composition is the same as that of the general battery. Its monomer battery consists of two electrodes (negative electrodes, i.e., fuel electrodes, and positive electrodes, oxidant electrodes), and electrolyte. Different, the active material of the general battery is stored inside the battery, and therefore, the battery capacity is limited. The positive and negative electrode itself does not contain an active substance, only a catalytic conversion element. Therefore, the fuel cell is actually converted into an energy conversion machine that can be converted into electrical energy. When the batte...

AI Technical Summary

Problems solved by technology

The existence of external pumps increases the complexity of the system and limits the application of microfluidic fuel cells in portable electronic devices

In order to get rid of the limitation of external pumps, in recent years, researchers have proposed to install microfluidic fuel cells in paper-based materials. Relevant studies have shown that the automatic feeding of reaction liquid can be realized by using capillary action, and a stable flow can be formed in the paper-based flow channel. Laminar flow, but the designed paper-based microfluidic fuel cell generally has a large internal resistance, and the flow rate of the reaction solution in the paper-based flow channel is low

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