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Preparation method of graphene/conductive polymer anode for microbial fuel cell

A conductive polymer, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as low power generation efficiency, improve power generation performance, good biocompatible stability and electrochemical activity, and low cost Effect

Active Publication Date: 2016-01-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing a composite graphene microbial fuel cell anode for the low efficiency of existing microbial fuel cells. The present invention uses electrochemical methods to electrodeposit polypyrrole / electrochemical Reduction of graphene oxide composite film to prepare a new type of electrode

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  • Preparation method of graphene/conductive polymer anode for microbial fuel cell
  • Preparation method of graphene/conductive polymer anode for microbial fuel cell
  • Preparation method of graphene/conductive polymer anode for microbial fuel cell

Examples

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Embodiment 1

[0022] like figure 1 As shown, the schematic diagram of the production process of the battery anode, in the figure 1 is the electrochemical workstation, 2 is the counter electrode, 3 is the reference electrode, 4 is the working electrode; where a refers to the mixed solution (pyrrole monomer and graphene oxide suspension aqueous solution), b refers to polypyrrole / graphene oxide composite film (constant voltage electropolymerization), c refers to polypyrrole / electrochemically reduced graphene oxide composite film (cyclic voltammetry reduction). Prepare the anode as follows:

[0023] (1) Dissolve 200mg of graphene oxide in 40mL of deionized water to a concentration of 5mg·mL -1 aqueous suspension of graphene oxide. Add 8 mmol of pyrrole monomer to the graphene oxide aqueous suspension solution to prepare a mixed solution, and the concentration of the conductive polymer monomer in the mixed solution is 0.2mol L -1 , after magnetic stirring at room temperature for 10 minutes, a...

Embodiment 2

[0030] The difference between this embodiment and Example 1 is that the electroplating amount is 60C during the polymerization modification process of anodic constant voltage electroplating. Other conditions are all identical with specific embodiment 1. At this time, the maximum power density of the battery reaches 3351mW / m 2 (See Figure 4 ).

Embodiment 3

[0032] The difference between this embodiment and Example 1 is that the anode is an unmodified pretreated graphite felt electrode. Other conditions are all identical with specific embodiment 1. The microbial fuel cell anode in this embodiment is the same as that in Embodiment 1. At this time, the maximum power density of the battery is only 180mW / m 2 (See Figure 5 ).

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Abstract

The present invention disclosed the preparation method of the anode of graphene / conductive polymer for microbial fuel cells, including the following steps: mixing the conductive polymer monomer with the graphene oxide water suspension solution, stir at room temperature and ultrasonic;The electrochemical polymerization polymerization of conductive polymer / graphene oxide oxide conductive composite is deposited on the anode surface, and then the circulating ambush method is used., Wash with exfoliating water and dry room temperature to make microbial fuel cells with graphene / conductive polymer anode.Compared with traditional chemical modification methods, the battery anode prepared by the present invention reduces the use of toxic reagents and tedious treatment. The preparation cost is low, and the industrialization of electrode production is easy to achieve.The power production capacity of fuel cells promotes the development and application of microbial fuel cells.

Description

technical field [0001] The invention relates to the field of microbial fuel cells, in particular to a method for preparing a graphene / conductive polymer anode for microbial fuel cells. Background technique [0002] Microbial fuel cell (MFC for short) is a fuel cell system that uses microorganisms as a catalyst to directly convert chemical energy in bioavailable organic matter into electrical energy. With its clean, environmentally friendly, and renewable advantages, it has gradually become an emerging energy field and environmental field. research hotspots. However, the power generation power of MFC is lower than that of fuel cells. The main reason is that on the one hand, the ability of electricity-producing bacteria to transfer electrons to the anode is not strong, and on the other hand, due to the large resistance loss in the MFC system. The material and structure of the anode directly affect the attachment of microorganisms, electron transfer and oxidation of substrates...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 冯春华吕志盛陈炎丰谢道海韦朝海
Owner SOUTH CHINA UNIV OF TECH