Preparation method and application of nitrogen-doped carbon nanotube to preparing cathode of microbial fuel cell of

A fuel cell cathode, nitrogen-doped carbon technology, applied to battery electrodes, circuits, electrical components, etc., to achieve low-cost effects

Active Publication Date: 2011-07-06
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of nitrogen-doped carbon nanotubes as cathode oxygen reduction catalysts in MFCs containing neutral media has not been reported.

Method used

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  • Preparation method and application of nitrogen-doped carbon nanotube to preparing cathode of microbial fuel cell of
  • Preparation method and application of nitrogen-doped carbon nanotube to preparing cathode of microbial fuel cell of
  • Preparation method and application of nitrogen-doped carbon nanotube to preparing cathode of microbial fuel cell of

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1: Electrode Preparation

[0038] Mix nitrogen-doped carbon nanotubes, conductive materials, and binders in a mass ratio of 10:31:63, and add isopropanol reagent for ultrasonic dispersion for 30 minutes; spread the ultrasonic mixture evenly on carbon fiber cloth, and let it dry naturally for 24 minutes. Nitrogen-doped carbon nanotube catalytic electrodes were prepared within hours. Pt / C catalytic electrodes can be prepared by mixing conventional Pt / C catalysts, conductive materials and binders in the same way.

[0039] Step 2: Single-chamber microbial fuel cell performance test

[0040] as attached figure 2 As shown, 15mL of electrogenic microbial bacterial solution was loaded into a single-chamber microbial fuel cell from the inlet, and the nitrogen-doped carbon nanotube catalytic electrode and the Pt / C catalytic electrode prepared above were used as the cathode of the fuel cell. Connect the fuel cell to a 1000-ohm external resistance circuit, start recording ...

Embodiment 2

[0045] Step 1: Electrode Preparation

[0046] The electrode fabrication steps of Example 2 are as described in Example 1.

[0047] Step 2: Dual-chamber microbial fuel cell performance test

[0048] as attached image 3 As shown, 15mL of electrogenic microbial liquid was loaded into the anode of the dual-chamber microbial fuel cell from the inlet, and the nitrogen-doped carbon nanotube catalytic electrode and the Pt / C catalytic electrode prepared above were respectively used as the cathode of the fuel cell. The operating steps of the microbial fuel cell power generation performance test in Example 2 are as described in Example 1. The performance of microbial fuel cells with different catalytic electrodes is shown in Table 2.

[0049] Table 2 Performance comparison of dual-chamber microbial fuel cells with different catalytic electrodes

[0050]

[0051] It can be seen from Table 2 that, compared with conventional Pt / C catalysts, nitrogen-doped carbon nanotubes used as ox...

Embodiment 3

[0053] Step 1: Electrode Preparation

[0054] The electrode fabrication steps of Example 3 are as described in Example 1. The nitrogen-doped carbon nanotubes, the conductive material and the binder are fully mixed according to the mass ratio of 10:15:32.

[0055] Step 2: Single-chamber microbial fuel cell performance test

[0056] The operating steps of the microbial fuel cell power generation performance test in Example 3 are as described in Example 1. The performance of microbial fuel cells with different catalytic electrodes is shown in Table 3.

[0057] Table 3 Performance comparison of single-chamber microbial fuel cells with different catalytic electrodes

[0058]

[0059] It can be seen from Table 3 that compared with conventional Pt / C catalysts, nitrogen-doped carbon nanotubes have higher catalytic activity and stability as oxygen reduction catalysts for single-chamber microbial fuel cells.

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Abstract

The invention discloses a preparation method and application of a nitrogen-doped carbon nanotube to preparing a cathode of a microbial fuel cell, wherein nitrogen-doped carbon nanotube powder is used as an oxygen reduction catalyst of the microbial fuel cell. The specific preparation method comprises the steps of: mixing the nitrogen-doped carbon nanotube, a conductive material and a binder in a certain proportion; adding a solvent in the mixture, mixing evenly and carrying out ultrasonic dispersion; evenly coating the ultrasonic mixture on a conductive substrate; and naturally air-drying to form the cathode of the microbial fuel cell. Compared with the microbial fuel cells which are assembled by using the conventional noble metal platinum as the cathode oxygen reduction catalyst, the microbial fuel cell which takes the nitrogen-doped carbon nanotube as the cathode oxygen reduction catalyst has higher output power and better running stability. Compared with the platinum catalyst, the nitrogen-doped carbon nanotube has low cost.

Description

technical field [0001] The invention belongs to the technical field of new energy and new material application, and specifically relates to the application of nitrogen-doped carbon nanotubes in the preparation of microbial fuel cell cathodes and a preparation method thereof. Background technique [0002] With the continuous aggravation of the energy crisis and the increasing discharge of organic waste, the development of new energy based on organic waste has attracted increasing attention because of its consideration of environmental protection. In recent years, as a new device that uses microorganisms to directly convert chemical energy in organic matter into electrical energy, microbial fuel cells (MFCs) have gradually become a research hotspot in the fields of new energy development and environmental governance. [0003] MFCs are the product of the combination of microorganisms and fuel cell technology. Its basic working principle is that organic matter is oxidized and de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCY02E60/50
Inventor 陈银广冯雷雨严媛媛
Owner TONGJI UNIV
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