Soil microbial fuel cell taking graphite rods as electrodes and application of soil microbial fuel cell

Abstract

The invention relates to a soil microbial fuel cell taking graphite rods as electrodes. The soil microbial fuel cell comprises a cathode graphite rod, a voltmeter and an anode graphite rod, wherein the voltmeter is connected with the cathode graphite rod and the anode graphite rod respectively through a conductive wire, upper parts of the cathode graphite rod and the anode graphite rod are wound with copper wires connected with the conductive wire, the upper part of the anode graphite rod is sleeved with an insulating sheath, a thread is formed at the lower part of the cathode graphite rod, the lower part of the cathode graphite rod is matched and connected with the insulating sheath through the thread, and the lower parts of the insulating sheath and the anode graphite rod are tapered. The soil microbial fuel cell is inserted into soil more easily, greater damage to a soil structure and plant roots is avoided, the contact area of the anode graphite rod with an electrolyte in the soil is increased, and electron exchange and higher voltage output are facilitated; and the graphite rods which are low in cost, soft and easy to process, and materials are easy to obtain, so that the graphite rods are good electrode materials.

Description

technical field [0001] The invention relates to a soil microbial fuel cell using graphite rods as electrodes and an application thereof, belonging to the technical field of microbial fuel cells. Background technique [0002] Environmental issues and sustainable use of energy are mainstream hotspots in today's society, and they are also objective requirements for the implementation of sustainable development. [0003] In recent years, there have been fuel cells that use the chemical energy in soil or sewage to convert the electrical energy needed by humans. Microbial fuel cells use the redox reaction of microorganisms in the soil to humus in the soil to generate current, and there are different potentials at different distances from the roots. resulting in output power. In daily life, domestic potted plants and aquatic plants can also be set as fuel cells. If the plants grow well, the organic humus in the culture solution (quality) will increase, and the output power of the ...

AI Technical Summary

Problems solved by technology

[0004] However, for soil microbial fuel cells, the design of the electrodes determines the quality of the power output. Some soil microbial fuel cells are unreasonably designed: First, because the cathode electrode can only be on the surface, the cathode electrode cannot be well fixed

Second, the relative distance between the two electrodes is unscientific, the output voltage is too low, and the internal resistance between the electrodes is too large, which cannot form a good output; third, when the electrodes are inserted into the soil, they are easy to damage the roots of the plants, and the fixation is not firm; third, the electrode materials easy to wear

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