Thermoelectric conversion method

Abstract

The invention provides a thermoelectric conversion method, the thermoelectric conversion method comprises the following steps: providing a sample, wherein material of the sample is a dielectric substance; applying an acting force on the sample, enabling the inside of the sample to generate strain gradient, and generating a thermoelectric current based on flexoelectric effect and electric conductance in the material. The thermoelectric conversion method provided by the invention is based on coupling of the flexoelectric effect and the electric conductance and has no connection with variation ofenvironment temperature and temperature gradient. Uneven strain is generated in the sample material through methods, such as bending, thereby, flexoelectric electric field is generated, electric conductance of the sample material is caused, and the thermoelectric current is generated, relative to a method based on Seebeck effect or pyroelectric effect in the existing technology, the thermoelectric conversion method provided by the invention can generate thermoelectric current without dependence on temperature gradient or temperature variation, thereby can be adapted to more materials, has relatively lower requirement on temperature environment of thermoelectric conversion and consequently can expand application range of thermoelectric conversion.

Description

technical field [0001] The invention belongs to the application field of functional materials, and mainly relates to a thermoelectric conversion method. Background technique [0002] With the emergence of worldwide energy crisis, research on energy recycling has been carried out for decades. In the process of energy use, more than 40% are dissipated and lost in the form of heat energy. If this part of the dissipated heat energy is collected and converted into electrical energy, energy recycling can be realized to a certain extent. The traditional thermoelectric conversion technology is based on the Seebeck effect. The Seebeck effect is to realize the macroscopic directional diffusion of charged particles through the temperature difference between the two ends of the material, thereby realizing thermoelectric conversion. Materials that realize thermoelectric conversion based on the Seebeck effect are thermoelectric materials in the traditional sense. Ideal thermoelectric m...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a thermoelectric conversion method to solve the problem in the prior art that the thermoelectric conversion method must rely on a special temperature environment and has limitations in use

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