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Air cathode, preparation method of air cathode and microbiological fuel cell

An air cathode and anode technology, which is applied in the fields of materials, energy, and the environment, can solve problems such as the complexity of the preparation process, and achieve the effects of improving electrode performance, improving electrode conductivity, improving efficiency and effectiveness

Active Publication Date: 2016-02-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the current air cathode, there is a common problem that the preparation process is complicated. Usually, the electrode material needs to be kneaded or painted many times to make it shape.

Method used

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  • Air cathode, preparation method of air cathode and microbiological fuel cell
  • Air cathode, preparation method of air cathode and microbiological fuel cell
  • Air cathode, preparation method of air cathode and microbiological fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1: preparation catalyst layer

[0077] Cut the 40-mesh nickel mesh into a rectangle of 4cm×8cm, put it in distilled water and ultrasonically clean it for 5-10 minutes, and remove dust and other impurities on the surface of the nickel mesh. The cleaned nickel mesh is curled into a shape that can be put into a quartz boat to ensure that the nickel mesh has no contact with each other, so that it can be in good contact with the reaction gas. Place the nickel mesh on the quartz boat, the quartz boat is connected with a copper wire, wind the iron wire at the end of the copper wire, and slowly push the quartz boat into the middle of the reaction chamber. Make sure that the wire part stays outside the reaction chamber. Wrap the heating tape in the preheating zone and set the temperature at 270 degrees Celsius. Check the airtightness of the reaction device, if the airtightness is good, feed 300mL / min of argon to discharge the air in the device. The furnace temperat...

Embodiment 2

[0078] Embodiment 2: preparation catalyst layer

[0079] Referring to Example 1, the difference is that the injection rate of acetonitrile is 10 μL / min, and the injection time is 5 minutes.

Embodiment 3

[0080] Embodiment 3: preparation catalyst layer

[0081] Referring to Example 1, the difference is that the injection rate of acetonitrile is 20 μL / min, and the injection time is 5 minutes.

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Abstract

The invention provides an air cathode. The air cathode comprises a catalyst layer containing nitrogen-doped graphene, and a diffusion layer. The nitrogen-doped graphene provides a catalyst layer with good catalysis performances for the air cathode. The air cathode can be prepared by simple and convenient processes. The catalyst layer can be roll-molded without a binder so that electrode performances of the air cathode can be improved.

Description

technical field [0001] The present invention relates to the fields of environment, material and energy, in particular, the present invention relates to an air cathode, a method for preparing the air cathode, a microbial fuel cell and the use of the microbial fuel cell in treating aqueous media. Background technique [0002] Environmental issues and energy issues are two major problems facing the development of contemporary society. Purifying sewage while taking into account energy recovery is a new challenge for sewage treatment technology. Microbial fuel cell is an emerging sewage treatment technology, which can convert the chemical energy in the pollutants into electrical energy while treating sewage, and use the electricity-producing microorganisms attached to the anode to oxidize the organic matter in the sewage, while the cathode accepts electrons to complete the oxygen. reduction reaction. Among the cathodes of microbial fuel cells, air cathodes have attracted extensi...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8605H01M4/8825Y02E60/50
Inventor 张潇源王秋莹吕瑞涛黄霞梁鹏陈熹
Owner TSINGHUA UNIV
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