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Preparation method of Prussian blue-doped oxygen reducing cathode film

A Prussian blue and cathode film technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problem of high loss of oxygen reduction activation, and achieve the effects of improving oxygen reduction catalytic efficiency, simplifying the preparation process, and reducing polarization internal resistance.

Active Publication Date: 2020-02-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prussian blue has the advantages of excellent electrochemical reversibility, high stability, and easy preparation. By doping Prussian blue in the cathode film, the conductivity of the cathode film can be improved, the charge transfer resistance of the cathode can be effectively reduced, and the oxygen reduction catalysis of the cathode can be improved. Reaction rate, thereby increasing the output power of the MFC system, and solving the problem of high oxygen reduction activation loss in the MFC system

Method used

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  • Preparation method of Prussian blue-doped oxygen reducing cathode film
  • Preparation method of Prussian blue-doped oxygen reducing cathode film
  • Preparation method of Prussian blue-doped oxygen reducing cathode film

Examples

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Embodiment 1

[0024] This example illustrates that the present invention provides a preparation method and characterization method of an oxygen-reducing cathode film doped with Prussian blue. Proceed as follows:

[0025] (1) Mix polyethersulfone and potassium bicarbonate at a mass ratio of 2:1 at a temperature of 30°C, dissolve in N,N-dimethylacetamide solution, wrap it in tin foil, and stir for 5 hours in the dark, and Stand still for 6 hours to obtain a homogeneous solution free of air bubbles, and the mass ratio of polyethersulfone to N,N-dimethylacetamide is 1:10. Mix polypyrrole, polyaniline and Prussian blue according to the mass ratio of 8:1:1, mix the mixed material and the homogeneous solution that has been debubbled according to the mass ratio of 0.3g:1mL, mix and ultrasonicate for 30min to make a conductive film liquid;

[0026] (2) According to the step (1) the polypyrrole loading in the conductive film solution is 25 mg cm -2 , spread the conductive film solution prepared in ...

Embodiment 2

[0034] This example illustrates that the present invention provides a preparation method and characterization method of an oxygen-reducing cathode film doped with Prussian blue. Proceed as follows:

[0035](1) Mix polyvinyl chloride and polyvinylpyrrolidone at a mass ratio of 2:1.2 at a temperature of 32°C, dissolve in an organic solvent N,N-dimethylacetamide solution, wrap it in tin foil, and stir for 6 hours in the dark , and let it stand for 6.5h to obtain a homogeneous solution without air bubbles; the mass ratio of polyvinyl chloride to N,N-dimethylacetamide is 1:12. Mix polypyrrole, polyaniline and Prussian blue according to the mass ratio of 8:1:1.5, and mix the mixed material with the homogeneous solution from which bubbles have been removed according to the mass ratio of 0.35g:1mL and ultrasonically mix for 35min to make a conductive film liquid;

[0036] (2) The polypyrrole load in the conductive film solution according to step (1) is 26 mg cm -2 , spread the condu...

Embodiment 3

[0044] This embodiment illustrates that the present invention provides a preparation method and a characterization method of doped Prussian blue oxygen-reducing cathode film, and the steps of doping the Prussian blue cathode film are as follows:

[0045] (1) Mix polyvinylidene fluoride and polyethylene glycol at a mass ratio of 2:1.5 at a temperature of 35°C, dissolve in N,N-dimethylacetamide solution, wrap it in tin foil, and stir for 7 hours in the dark , and leave it to stand for 7h to obtain a homogeneous solution that removes bubbles; the mass ratio of the polyvinylidene fluoride to N, N-dimethylacetamide is 1:13; the conductive materials polypyrrole, polyaniline and Prussian blue Mix according to the mass ratio of 8:1:2, the mixed material and the homogeneous solution from which the bubbles have been removed in the medium are mixed according to the mass ratio of 0.4g:1mL and ultrasonicated for 40min to make a conductive film liquid;

[0046] (2) According to step (1) the...

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Abstract

The invention relates to a preparation method of a Prussian blue-doped cathode film for improving oxygen reduction performance. One of polyvinylidene fluoride, polyvinyl chloride and polyethersulfoneis mixed with an organic polymer film-forming and pore-forming agent and the solution stands in an N, N-imethylacetamide solution to obtain a homogeneous solution with bubbles removed; polypyrrole, polyaniline and Prussian blue are mixed according to the mass ratio of 8: 1: 1-8: 1: 2 and the mixed material and the homogeneous solution without bubbles removed are mixed evenly for ultrasonic treatment for 30-40min to prepare a conductive film liquid according to the mass ratio (0.3-0.4 g): 1mL; and the stainless steel mesh coated with the conductive film liquid is immersed in the deionized waterto form the film so as to obtain a Prussian blue-doped cathode film. The highest conductivity of the Prussian blue-doped cathode film is 18.4 ms cm-1 which is increased by 86% in comparison with 9.9ms cm-1 of the blank cathode.

Description

technical field [0001] The invention relates to a preparation method of a cathode film for improving oxygen reduction performance by doping Prussian blue. Background technique [0002] Wastewater is a potential energy substance, and its potential energy is about 10 times the energy consumption of sewage treatment. The potential energy of sewage generated globally every day is equivalent to about 100 million tons of standard fuel oil. The potential energy development of sewage can solve the total power consumption of society Therefore, while solving the problem of wastewater treatment, realizing high-grade water recovery and energy utilization has become a difficult problem in the field of water treatment. [0003] Microbial fuel cell technology (MFC) can use the anaerobic catalysis of microorganisms to convert the chemical energy in biodegradable substances in wastewater into electrical energy, and realize the simultaneous recovery of sewage treatment and electrical energy. ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86
CPCH01M4/8828H01M4/8673H01M4/8803H01M2004/8689Y02E60/50
Inventor 刘佳许润钒郁美莹陈雪鹏何伟华李楠冯玉杰
Owner TIANJIN UNIV
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