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Method for manufacturing air cathode of single-chamber microbial fuel cell

A manufacturing method and fuel cell technology, applied in the field of electrochemistry, can solve the problems of high cost and achieve the effects of high electricity production efficiency, low material cost, and simple manufacturing method

Inactive Publication Date: 2014-04-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The air cathode of a single-chamber microbial fuel cell is an important factor affecting electricity production. At present, PTFE is generally used as a binder and a diffusion layer to make an air cathode, but the cost of using this polymer to make an air cathode is relatively high

Method used

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  • Method for manufacturing air cathode of single-chamber microbial fuel cell
  • Method for manufacturing air cathode of single-chamber microbial fuel cell
  • Method for manufacturing air cathode of single-chamber microbial fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Soak the carbon cloth in acetone for about 4 hours, then wash it with deionized water and dry it, then heat it at 400°C for 1 hour;

[0027] (2) Use 1.56 mg of acetylene black powder per square centimeter of carbon cloth, and 10 μL of PVDF emulsion with a mass concentration of 18% per mg of acetylene black powder. Weigh the acetylene black powder and the mass concentration of 18%. PVDF emulsion and mixing the two to obtain a pasty mixture;

[0028] (3) Spread the paste mixture obtained in step (2) evenly on one surface of the carbon cloth obtained in step (1), dry in the air for 2 hours, and sinter at a temperature of 250°C for 20 minutes. Obtain a carbon base layer on one surface of the carbon base layer; repeat the steps of coating the paste mixture obtained in the above step (2) and drying and sintering once on the surface of the obtained carbon base layer;

[0029] (4) According to the ratio of 5 μL of PVDF emulsion with a mass concentration of 18% per square c...

Embodiment 2

[0034] Basically the same as in Example 1, except that the support carbon cloth in Example 1 is changed to carbon paper, and the 1.56 mg of acetylene black powder in step (2) is changed to 1.00 mg of acetylene black powder to obtain a single-chamber microbial fuel The air cathode of the battery.

[0035] The air cathode of the single-chamber microbial fuel cell 2 Diffusion performance test, oxygen reduction activity measurement and actual power generation performance appraisal, the results are shown in Table 1, figure 1 with figure 2 .

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Abstract

The invention belongs to the field of electrochemistry and relates to a method for manufacturing an air cathode of a single-chamber microbial fuel cell. The manufacturing method comprises the following steps: with carbon paper or carbon cloth as a support, mixing PVDF (Polyvinylidene Fluoride) emulsion and carbon black powder, uniformly daubing the mixture on one side of the support, drying, and sintering at high temperature to form a carbon-based layer; daubing the PVDF emulsion on the carbon-based layer, drying, and sintering at high temperature to form an air diffusion layer; and bonding Pt / C on the other side of the support by utilizing a Nafion adhesive to serve as a catalyst layer, thus preparing a novel air cathode. The sintering temperature is as high as 370 DEG C in the common operation of manufacturing the air cathode by utilizing PTFE (Polytetrafluoroethylene) at present, the requirement on the sintering temperature of the process according to the invention is low, and the cost of the used PTFE is only 1 / 3 of the PTFE. According to theoretical and actual verification, the manufactured air cathode is low in manufacturing cost and is high-performance.

Description

technical field [0001] The invention belongs to the field of electrochemistry and relates to a method for manufacturing an air cathode of a single-chamber microbial fuel cell. Background technique [0002] Microbial fuel cell is a device that uses microorganisms as a catalyst to directly oxidize organic matter in wastewater to generate electricity. It can harvest electricity while treating wastewater, which can reduce the cost of wastewater treatment and provide a feasible way to solve energy and environmental pollution problems. the road. [0003] At present, most microbial fuel cells adopt a single-chamber structure. Because of its simple structure, low cost, high power generation efficiency, and direct use of oxygen in the air as an electron acceptor, the practical application of microbial fuel cells is possible. The air cathode of a single-chamber microbial fuel cell is an important factor affecting electricity production. At present, PTFE is generally used as a binder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50H01M4/8807H01M4/8817H01M4/8828H01M8/16
Inventor 沈建权邱昭政韦丽玲苏敏贾奇博
Owner INST OF CHEM CHINESE ACAD OF SCI
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