Efficient microbial fuel cell integrated air cathode and preparation method and application thereof

A high-efficiency microorganism and fuel cell technology, applied in the direction of biochemical fuel cells, battery electrodes, electrical components, etc., can solve the problems of MFC microbial contamination, complex preparation process, etc., and achieve the effect of low cost, simple preparation and superior performance

Pending Publication Date: 2022-07-05
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, to propose a high-efficiency microbial fuel cell integrated air cathode and its preparation method and application, to solve the complex preparation process of the microbial fuel cell air cathode in the prior art and the binding agent used in the preparation process. Technical Problems Contaminating MFC Microorganisms

Method used

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  • Efficient microbial fuel cell integrated air cathode and preparation method and application thereof
  • Efficient microbial fuel cell integrated air cathode and preparation method and application thereof
  • Efficient microbial fuel cell integrated air cathode and preparation method and application thereof

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preparation example Construction

[0020] see figure 1 , a first aspect of the present invention provides a method for preparing a high-efficiency microbial fuel cell integrated air cathode, comprising the following steps:

[0021] S1, adding zinc chloride and polyacrylonitrile (PAN) to N,N-dimethylformamide (DMF) and mixing uniformly to obtain spinning solution;

[0022] S2, electrospinning the spinning solution to obtain a fiber membrane;

[0023] S3, drying the fiber membrane and performing pre-oxidation and high-temperature carbonization in sequence to obtain an integrated air cathode of a high-efficiency microbial fuel cell.

[0024] In the present invention, the dosage ratio of zinc chloride and N,N-dimethylformamide is (0.1-0.4) g: 10 mL.

[0025] In the present invention, the mass ratio of zinc chloride to polyacrylonitrile is (0.1-0.4):1, preferably (0.25-0.3):1, and more preferably 0.3:1.

[0026] In the present invention, the steps of adding zinc chloride and polyacrylonitrile into N,N-dimethylfor...

Embodiment 1

[0034] (1) Weigh 0.1g ZnCl 2 Poured into 10mL N,N-dimethylformamide, ultrasonicated for 2h to obtain ZnCl 2 solution;

[0035] (2) Weigh 1g PAN and add ZnCl 2 In the solution, heat and stir for 6 h in a water bath at 60 °C until the mixture is uniform and the solution becomes translucent to obtain ZnCl 2 / PAN solution;

[0036] (3) ZnCl 2 / PAN solution is poured into a 50mL syringe, the device is connected, a voltage of 20kV is applied, and the ZnCl is injected at a rate of 1mL / h. 2 The PAN solution is pushed out from the needle 18cm away from the collecting drum, the drum is collected, and after the spinning solution is consumed, a fiber film is obtained; wherein, the drum diameter is 76.48 mm, the drum speed is 30 mm / s, the nozzle moving speed is 5 mm / s, and the reciprocating The distance is 75mm;

[0037] (4) The fiber membrane was dried in a vacuum drying oven at 60°C for 12h, then pre-oxidized in an oven at 250°C for 2h, and finally the sample was heated in a tube f...

Embodiment 2

[0039] (1) Weigh 0.25g ZnCl 2 Poured into 10mL N,N-dimethylformamide, ultrasonicated for 2h to obtain ZnCl 2 solution;

[0040] (2) Weigh 1g PAN and add ZnCl 2 In the solution, heat and stir for 6 h in a water bath at 60 °C until the mixture is uniform and the solution becomes translucent to obtain ZnCl 2 / PAN solution;

[0041] (3) ZnCl 2 / PAN solution is poured into a 50mL syringe, the device is connected, a voltage of 20kV is applied, and the ZnCl is injected at a rate of 1mL / h. 2 The PAN solution is pushed out from the needle 18cm away from the collecting drum, the drum is collected, and after the spinning solution is consumed, a fiber film is obtained; wherein, the drum diameter is 76.48 mm, the drum speed is 30 mm / s, the nozzle moving speed is 5 mm / s, and the reciprocating The distance is 75mm;

[0042](4) The fiber membrane was dried in a vacuum drying oven at 60°C for 12h, then pre-oxidized in an oven at 250°C for 2h, and finally the sample was heated in a tube f...

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Abstract

The invention discloses an efficient microbial fuel cell integrated air cathode as well as a preparation method and application thereof. The preparation method of the efficient microbial fuel cell integrated air cathode comprises the following steps: adding zinc chloride and polyacrylonitrile into N, N-dimethylformamide, and uniformly mixing to obtain a spinning solution; performing electrostatic spinning on the spinning solution to obtain a fiber membrane; and drying the fiber membrane, and sequentially carrying out pre-oxidation and high-temperature carbonization to obtain the efficient microbial fuel cell integrated air cathode. The nanofiber membrane prepared by the invention has self-supporting property, is used as a cathode of a microbial fuel cell, does not need to additionally add a binder and a conductive agent, can better integrate an air diffusion layer and a catalytic layer, is easy to modify or compound, and has important application value; the nanofiber film prepared by the method has the advantages of low cost, simplicity in preparation, excellent performance and the like, and has important application value in the field of microbial fuel cells.

Description

technical field [0001] The invention relates to the technical field of microbial fuel cells, in particular to a high-efficiency microbial fuel cell integrated air cathode and a preparation method and application thereof. Background technique [0002] Microbial fuel cell (MFC) is a green technology that uses microorganisms to directly convert chemical energy in organic matter into electrical energy. In the anaerobic environment of the anode chamber, under the action of microorganisms, organic compounds are decomposed and electrons and protons are released. The electrons are transferred to the cathode through the external circuit to form an electric current. The protons pass through the proton exchange membrane to the cathode. Protons combine to form water. Cathode performance is considered to be a major limitation of MFCs. The cathode electrode is usually composed of a catalyst layer and an air diffusion layer, and sometimes a support layer is required. The preparation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M4/96H01M8/16B82Y40/00B82Y30/00
CPCH01M4/88H01M4/8605H01M4/96H01M4/8663H01M8/16B82Y30/00B82Y40/00H01M2004/8684
Inventor 王明玺徐梦
Owner WUHAN INSTITUTE OF TECHNOLOGY
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