Composite electrode, preparation method and uses thereof

A composite electrode and electrode technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limiting the output power of microbial fuel cells, low electron transfer efficiency, unfavorable promotion and application, etc., to improve electron transfer efficiency and bio-adhesion Quantity, preparation method is simple and convenient effect

Active Publication Date: 2015-10-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most widely used anode in microbial fuel cells has the problems of less bio-adhesion and low electron transfer efficiency, which limits the output power of microbial fuel cells and is not conducive to its popularization and application.

Method used

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  • Composite electrode, preparation method and uses thereof
  • Composite electrode, preparation method and uses thereof
  • Composite electrode, preparation method and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 1. Preparation method of stainless steel felt / graphene / manganese dioxide composite electrode

[0063] Using stainless steel felt as a conductive substrate, and graphene and manganese dioxide as active substances loaded on the surface of the conductive substrate, the steps for preparing a composite electrode are as follows:

[0064] (1) Using scissors, the stainless steel felt was cut into discs with a diameter of 3.8 cm, and then, after pretreatment with 20% acetone for 12 hours, it was dried at 60° C. for 12 hours.

[0065] (2) Ultrasonic disperse graphite oxide in deionized water to obtain a graphene oxide solution, ultrasonic conditions: power 400-600W, on for 5s and off for 5s, 90 times in total. After centrifugation, remove the supernatant suspension and dilute to a 1 mg / mL solution.

[0066] (3) Immerse the stainless steel felt in a 1 mg / mL graphene oxide solution for 15 minutes, take it out and dry it at 105°C, and then impregnate the dried stainless steel felt ...

Embodiment 2

[0079] The stainless steel felt / graphene / manganese dioxide composite electrode prepared in Example 1 was used as an anode to prepare a dual-chamber microbial fuel cell, and its performance was tested, as follows:

[0080] 1. Preparation of microbial fuel cells

[0081] The stainless steel felt / graphene / manganese dioxide composite electrode that adopts embodiment 1 to prepare is as anode, with reference to figure 1 The structure of the microbial battery is shown, and a dual-chamber microbial fuel cell is prepared.

[0082] The specific structure of the dual-chamber microbial fuel cell is as follows: figure 1 Shown, wherein, 100 is the first circulating bottle, 200 is a peristaltic pump, 300 is an anode (stainless steel felt / graphene / manganese dioxide composite electrode), 400 is a cation exchange membrane, 500 is a cathode (carbon brush electrode), 600 700 is the external resistance, 800 is the anode chamber, 900 is the cathode chamber, and the direction of the arrow in the f...

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Abstract

The present invention discloses a composite electrode, a preparation method and uses thereof, wherein the composite electrode comprises an electric conduction substrate, graphene and manganese dioxide. According to the present invention, the composite electrode does not contain a binder, the electrode resistance is low, the active substance dispersion property is good, and the biocompatibility is good; the composite electrode adopts graphene as the electric conduction substrate skeleton, such that the manganese dioxide particles can be uniformly dispersed on the graphene surface with characteristics of large specific surface area and excellent electric conductivity so as to effectively improve the surface area of the manganese dioxide and reduce the resistance of the electrode; and with the application of the composite electrode in the microbial fuel cell anode, the biological adhesion of the anode can be effectively improved, the electron transfer efficiency of the anode is increased so as to improve the electricity production property of the microbial fuel cell.

Description

technical field [0001] The invention relates to the technical field of microbial fuel cells, in particular to a composite electrode and a preparation method thereof. Background technique [0002] Microbial fuel cell is a device that uses electricity-producing microorganisms to directly convert chemical energy in organic matter into electrical energy. It can obtain electrical energy while treating sewage. Compared with traditional chemical batteries, the output power of microbial fuel cells is still low, which limits the large-scale utilization of microbial fuel cells. The anode is not only the carrier for the attachment of electrogenic microorganisms, but also the conductor of electron transfer, which plays a vital role in improving the output power of microbial fuel cells. Therefore, it is particularly important to seek anode materials for microbial fuel cells that can not only increase the amount of electricity-producing microorganisms attached, but also increase the elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/16H01M4/86
CPCH01M4/8657H01M4/8875H01M8/16Y02E60/50Y02P70/50
Inventor 梁鹏张常勇黄霞
Owner TSINGHUA UNIV
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