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Method for preparing air cathode of microbial fuel cell by using petroleum cokes

An air cathode and fuel cell technology, applied in the direction of biochemical fuel cells, battery electrodes, electrical components, etc., can solve the problem of high price of activated carbon, achieve the effects of reducing production costs, realizing resource utilization, and realizing full utilization

Inactive Publication Date: 2014-06-25
NANKAI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the price of activated carbon sold in the market is still relatively high

Method used

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  • Method for preparing air cathode of microbial fuel cell by using petroleum cokes
  • Method for preparing air cathode of microbial fuel cell by using petroleum cokes
  • Method for preparing air cathode of microbial fuel cell by using petroleum cokes

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Embodiment 1

[0032] The preparation method of the petroleum coke activator air cathode in the present invention comprises the steps:

[0033] Activation of Petroleum Coke

[0034] The petroleum coke solid is put into a ball mill and ground to a particle size below 200 microns, which is used as the raw material for the next step of activation. Mix a certain amount of petroleum coke powder and KOH in a weight ratio of 4:1, place them in a mortar and continue grinding, so that the two can be evenly mixed. The mixed powder is placed in a porcelain boat, placed in a tube furnace, and activated under the protection of nitrogen.

[0035] Activation process, including initial activation and final activation. The initial activation is to raise the temperature of the tube furnace to 300°C at a rate of 3°C / min and keep it there for one hour. The final activation is based on the preliminary activation, the temperature of the tube furnace is raised to 800°C at a rate of 5°C / min and kept for 1 hour. ...

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Abstract

The invention discloses a method for preparing an air cathode of a microbial fuel cell by using petroleum cokes, relating to the preparation of electrodes of microbial fuel cells and particularly relating to a cheap and high-performance air cathode for a microbial fuel cell and a preparation method of the cheap and high-performance air cathode. A catalytic activation layer is prepared by using a petroleum coke activator in the method for preparing the air cathode of the microbial fuel cell by using petroleum cokes as raw materials. The method for preparing the air cathode comprises the following steps: petroleum coke activation; air diffusion layer preparation; catalytic activation layer preparation; air cathode drying. The method has the advantages that the manufacturing cost of the air cathode is further greatly reduced because the petroleum coke activator is used as the raw material of the catalytic activation layer; the petroleum cokes are recycled, and natural resources are sufficiently utilized; compared with the traditional activated carbon, the petroleum coke activator has larger specific surface area and higher catalytic activation, so that the electricity generation performance of the microbial fuel cell is improved.

Description

technical field [0001] The invention relates to the preparation of microbial fuel cell electrodes, in particular to a low-cost high-performance air cathode for microbial fuel cells and a preparation method thereof. Background technique [0002] Microbial fuel cell technology is a new technology developed in recent years. It integrates sewage treatment technology and bioelectricity generation technology. It can harvest electricity while degrading pollutants in sewage. Therefore, this technology has great application prospects. [0003] There are two types of microbial fuel cells: double-chamber and single-chamber designs, but single-chamber microbial fuel cells are widely used and have better application prospects at this stage. This is because the design of the single-chamber microbial fuel cell is simpler and the ion-exchange membrane in the middle is removed; the cost of the battery without the ion-exchange membrane has been greatly reduced; moreover, the single-chamber de...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCH01M4/8807H01M4/8864H01M4/8882H01M4/96H01M8/16Y02E60/50
Inventor 李克勋张鹏张希陈志豪
Owner NANKAI UNIV
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