Microbial fuel cell and preparation method and application thereof

A technology for fuel cells and microorganisms, which is applied in the field of microbial fuel cells and their preparation, and can solve the problems that the output power cannot meet the expected demand, the operation is unstable, and the activity is insufficient.

Active Publication Date: 2020-04-17
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problems of high cost, small surface area, insufficient activity, unstable operation and output power that cannot meet the expected demand of existing microbial fuel cells

Method used

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  • Microbial fuel cell and preparation method and application thereof
  • Microbial fuel cell and preparation method and application thereof
  • Microbial fuel cell and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] 1. Preparation of 3DPG nanomaterials:

[0098] (1) Prepare graphene oxide by the Hummers method (refer to the 12th paragraph in the patent CN108395578A), and then add deionized water to disperse (the quality (mg) of graphene oxide is 3 times the volume (ml) of deionized water) to obtain the concentration 3mg / mL graphene oxide suspension;

[0099] (2) Take 3mg / mL 20mL graphene oxide suspension and mix evenly with 0.132mol / L KOH, and mix it with a piece of 2×3cm 2 Put the carbon cloth together into the reactor for hydrothermal reaction at 180°C for 5 hours to obtain graphene gel;

[0100] (3) The obtained graphene gel was freeze-dried for 2 days to obtain 3DPG nanomaterials.

[0101] 2. PNCO x Preparation of nanomaterials:

[0102] (1) Preparation of NCO nanomaterials:

[0103] ① Preparation of flexible carbon cloth substrate: the size is 2 × 3cm 2 The flexible carbon is placed in absolute ethanol for ultrasonic treatment to obtain a flexible carbon cloth substrate;...

Embodiment 2

[0117] (1) The 3DPG nanomaterial prepared in embodiment 1 is carried out field emission scanning electron microscope test, the result is as follows figure 1 shown.

[0118] From figure 1 It can be seen that the 3DPG nanomaterials are in the shape of three-dimensional mesoporous pores.

[0119] (2) Raman spectrum and high-resolution XPS characterization are carried out respectively to the 3DPG nano material that embodiment 1 prepares, the result is as follows figure 2 shown.

[0120] From figure 2 a It can be seen that the ratio of the two peak intensities of 3DPG nanomaterials I D : I G reached 0.93, indicating that the 3DPG nanomaterials have very abundant defects at the edges and planes of graphitic flakes. It can be seen from 2b that the C 1s peak fitting is divided into four peaks, corresponding to the C-C bonds, C-OH bonds, C=O bonds and C=O-OH bonds that occupy the main components, respectively.

[0121] (3) to the PNCO that embodiment 1 prepares x The nanomate...

Embodiment 3

[0133] (1) Utilize the Arbin battery test system to test the electrochemical performance of the microbial fuel cell prepared in embodiment 1, at first record the polarization curve and output power of the battery by adjusting the method of load external resistance, the results are as follows Figure 8 shown.

[0134] From Figure 8 It can be seen that the PNCO prepared in Example 1 x The open circuit potential of nanomaterials as the cathode of microbial fuel cells is about 0.59V, which is very close to the open circuit of microbial fuel cells (0.60V) with Pt / C as the cathode; and as the external resistance of the load continues to increase, the PNCO x The decrease rate of the voltage of the microbial fuel cell (0.60V) with nanomaterials as the cathode is slower than that of the microbial fuel cell with Pt / C as the cathode, which proves the faster charge transfer rate inside the battery.

[0135] In addition, to PNCO x Microbial fuel cell with nanomaterials as cathode at 2....

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Abstract

The invention discloses a microbial fuel cell and a preparation method and application thereof, which belong to the technical field of electrochemical energy conversion. The microbial fuel cell comprises a cathode material, an anode material and anolyte, wherein the cathode material is a NiCo2O4 nanowire array material modified by oxygen vacancy and phosphate ions; the anode material is a three-dimensional mesoporous graphene nano material; the anolyte is a phosphate buffer solution containing 2-hydroxy-1, 4-naphthoquinone, glucose and yeast extract. The microbial fuel cell provided by the invention has the advantages of low cost, large surface area, high conductivity, high biological catalytic activity, stable operation and high output power, and can meet the requirements of flexible solid-state capacitor devices.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy conversion, and in particular relates to a microbial fuel cell and its preparation method and application. Background technique [0002] With the rapid growth of the world's population and the continuous development of human society, people's various demands for energy are increasing day by day. It is obvious that traditional fossil energy cannot meet the various demands of future society for energy in the long run. In addition, with the development and utilization of fossil energy, the greenhouse effect is becoming more and more serious, and the ecological environment is deteriorating. Renewable and environmentally friendly green energy has become a common concern in today's society. Therefore, it is an important part of the development of renewable energy to develop a low-cost and environmentally friendly chemical power system to achieve high-efficiency power storage and output. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16
CPCH01M8/16Y02E60/50
Inventor 邱文达黎彧肖红兵
Owner GUANGDONG IND TECHN COLLEGE
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