Method for constructing ocean sediment microbial fuel battery with high output voltage and high output power

A seabed deposition and fuel cell technology, applied in the direction of biochemical fuel cells, fuel cell parts, battery electrodes, etc., can solve the problems that cannot meet the needs of instruments, low output voltage, and BMFC cannot be boosted in series

Inactive Publication Date: 2012-06-20
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the output voltage of BMFC is relatively low (the normal working voltage of the battery is about 0.35 ~ 0.5V), and in the marine environment, BMFC cannot be boosted in series, but can only be connected in parallel, and parallel connection cannot boost
On the other hand, the low voltage cannot meet the needs of the instrument

Method used

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  • Method for constructing ocean sediment microbial fuel battery with high output voltage and high output power
  • Method for constructing ocean sediment microbial fuel battery with high output voltage and high output power
  • Method for constructing ocean sediment microbial fuel battery with high output voltage and high output power

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1: This example is used to prepare a low-potential anode modified by electrolytic deposition of iron oxide.

[0040] Take 30g FeCl 3 ·6H 2 O. Add 400mL of distilled water into a 500mL beaker, heat up to 50-70°C and stir quickly until the iron salt is completely dissolved, the solution is brownish red, then cool to 20°C, transfer the solution in the beaker to a 500mL volumetric flask, and then use a small amount of Rinse the beaker with distilled water, introduce the rinsing solution into the volumetric flask, and then set the volume of the volumetric flask to the 500mL mark. Grind rod-shaped graphite (7cm×Φ0.9cm) with 100, 240, 360, 600, and 800 mesh sandpaper in sequence, then sonicate in ethanol for 10-20min, then in distilled water for 10-20min, take it out and dry it, and put the rod-shaped conductive substrate It is connected with the wire, and the connection between the wire and the substrate is sealed with epoxy resin. The rod-shaped conductive substra...

Embodiment 2

[0041] Example 2: This example is used to prepare a low-potential anode modified by electrolytic deposition of iron oxide.

[0042] Take 15g FeCl 2 4H 2 O. Add 400mL of distilled water into a 500mL beaker, heat up to 50-70°C and stir quickly until the iron salt is completely dissolved, then cool to 20°C, transfer the solution in the beaker to a 500mL volumetric flask, rinse the beaker with a small amount of distilled water, and The rinsing solution is introduced into the volumetric flask, and then the volumetric flask is set to the 500mL mark. Polish the dendritic graphite electrode with 100, 240, 360, 600, and 800 mesh sandpaper in sequence, then sonicate in ethanol for 10 minutes, then in distilled water for 10 minutes, take it out and dry it, connect the electrode to the wire, and use a ring at the connection between the wire and the substrate Oxygen resin seal. The dendritic graphite electrode is used as the working electrode, the rod-shaped graphite electrode is used a...

Embodiment 3

[0043] Example 3: This example is used to prepare a low-potential anode modified by electrolytic deposition of iron oxide.

[0044] Take 25g FeCl 3 ·6H 2 O and 12g FeCl 2 4H 2 O. Add 400mL of distilled water into a 500mL beaker, raise the temperature to 50°C and stir quickly until the iron salt is completely dissolved, then cool to 20°C, transfer the solution in the beaker to a 500mL volumetric flask, rinse the beaker with a small amount of distilled water, and dissolve the rinse solution Import into the volumetric flask, and then make the volumetric flask to the 500mL mark. Grind the disc-shaped graphite electrode with 100, 240, 360, 600, and 800 mesh sandpaper in sequence, then sonicate in ethanol for 10 minutes, then in distilled water for 10 minutes, take it out and dry it, connect the conductive substrate to the wire, and connect the wire to the substrate Seal with epoxy. Use the disc-shaped graphite electrode as the working electrode, and the rod-shaped graphite ele...

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Abstract

The invention relates to the technical field of microbial fuel battery, and provides a method for constructing ocean sediment microbial fuel battery with high output voltage and high output power. The high output power of the battery mainly derives from high output voltage, and the high output voltage is realized by adopting a graphite anode with ferric oxide electrolytically deposited thereon. Due to the electrolytic deposition of ferric oxide on the graphite anode, the potential of the anode modified by ferric oxide reaches -775 mV (with respect to saturated calomel electrode), and the maximum exchange current density is 0.00124 A / cm<2>. The novel ocean sediment microbial fuel battery constructed by the graphite anode has an output voltage of about 1.0 to 1.1 V, and maximum output power density of 743.7 mW / m<2>, which is 17 times that of battery assembled with unmodified anode.

Description

technical field [0001] The invention belongs to the technical field of microbial fuel cells (MFC), and in particular relates to a construction method of a seabed sediment microbial fuel cell with high output voltage and power. Background technique [0002] Microbial fuel cell (MFC) is a green power generation technology that has just emerged in recent years. It uses microorganisms as catalysts to directly convert chemical energy into electrical energy. [1] . Microbial fuel cells have a wide range of raw materials and can work at normal temperature and pressure. Park and Rabaey pointed out that the use of microbial fuel cells can degrade organic matter in wastewater or sludge into electrical energy, while reducing the COD value in sewage or sludge [2，3] . In microbial batteries, microorganisms decompose complex organic and inorganic substances, and then transfer the generated electrons to the external circuit through the anode, and then to the cathode to form an electric c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/16H01M8/02H01M4/88
CPCY02E60/527Y02E60/50
Inventor 付玉彬徐谦卢志凯张业龙刘媛媛
Owner OCEAN UNIV OF CHINA
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