Stacked passive paper-based microfluidic fuel cell with opposite arrangement of cathode and anode

Abstract

The invention discloses a stacked passive paper-based microfluidic fuel cell with opposite arrangement of cathode and anode. The stacked passive paper-based microfluidic fuel cell comprises an air self-breathing cathode, an electrolyte flow channel, a fuel flow channel, an anode and a bottom plate. The stacked passive paper-based microfluidic fuel cell is characterized in the electrolyte flow channel and the fuel flow channel are formed by stacking double-layer or multi-layer paper bases, and a certain gap is left among the paper bases as a flow channel for electrolyte or fuel. The electrolyteflow channel is located above the fuel flow channel. The air self-breathing cathode and the anode are arranged opposite in a vertical direction, and the air self-breathing cathode is arranged above and in contact with the electrolyte flow channel. The air self-breathing cathode is composed of a hydrophobic porous electrode, and a catalytic layer is arranged at the contact part with the electrolyte flow channel. The anode is embedded in the fuel flow channel in a horizontal direction and forms a wedge-shaped gap with the fuel flow channel. The anode is composed of a hydrophilic electrode, anda catalytic layer is arranged at the part overlapping the fuel flow channel. The stacked passive paper-based microfluidic fuel cell can be widely applied in the fields of power supply and the like.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a stacked passive paper-based microfluidic fuel cell in which cathodes and anodes are arranged oppositely. Background technique [0002] With economic development and improvement of living standards, the whole society pays more and more attention to personal health and public health. Paper-based analysis and detection chips can better meet the requirements of low cost, speed, and accuracy. At present, the new generation of paper-based analysis and detection chips based on electrical or electrochemical principles further reduces the detection limit, improves the detection accuracy, and can achieve specific detection. It has broad application prospects in health monitoring, environmental detection and other fields. The above-mentioned paper-based analysis and detection chips based on electrical or electrochemical principles also put forward higher requirements for micro power supplies. ...

AI Technical Summary

Problems solved by technology

On the other hand, affected by the small porosity of paper porous media, the diffusion coefficient and conductivity of ions are also low.

Therefore, the side-by-side arrangement of cathode and anode electrodes commonly used in paper-based microfluidic fuel cells will cause large ohmic internal resistance, which seriously limits the further improvement of battery performance.

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