Copper-and-selenium-based thermoelectric material with high structural stability and preparation method thereof
A thermoelectric material and stability technology, applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, nanotechnology for materials and surface science, etc., can solve material or device cracks, damage, inaccuracy Test thermoelectric performance and other issues to achieve the effect of improving thermoelectric performance
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[0024] The above solutions will be further described below in conjunction with specific implementation examples to illustrate the present invention.
[0025] Step 1: the elemental Cu, Se, Bi, Li according to Li y Cu 1.85-x Bi x Se (wherein x=0.02,0.03,0.04,0.05; y=0.01,0.02,0.03) stoichiometric ratio is weighed in an argon atmosphere with a purity greater than 99.999%, and the weighing quality is generally in the range of 8g-10g, and then transferred to In the ball mill tank; the Li element is the lithium sheet used to package the battery, and before weighing the Li sheet, it is necessary to lightly polish the two surfaces of the Li sheet with 1500 grit sandpaper to remove the oxide film and surface impurities.
[0026] Step 2: Put the ball mill jar with the ingredients in step 1 into a high-energy ball mill for ball milling. The milling time is 10 hours to obtain a uniform Li y Cu 1.85-x Bi x Se, where x=0.02, 0.03, 0.04, 0.05, y=0.01, 0.02, 0.03 nanometer powder; the di...
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