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Alloy electrode for skutterudite thermoelectric element and preparation method thereof

A technology of alloy electrodes and thermoelectric elements, which is applied in the manufacture/processing of thermoelectric devices, parts and components of thermoelectric devices, etc., and can solve problems such as difficult electrode preparation

Active Publication Date: 2017-01-04
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of using skutterudite as a ring-shaped thermoelectric device is still in its infancy. The reported research results are mainly aimed at the preparation of high-temperature end electrodes of thermoelectric elements with a regular shape. These technologies are difficult to apply to irregular-shaped elements with special heat sources. electrode preparation

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  • Alloy electrode for skutterudite thermoelectric element and preparation method thereof
  • Alloy electrode for skutterudite thermoelectric element and preparation method thereof
  • Alloy electrode for skutterudite thermoelectric element and preparation method thereof

Examples

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Effect test

Embodiment 1

[0066]Preparation of Ni(Mo) alloy electrode at the low temperature end of skutterudite thermoelectric power generation element by electroplating method: P-type skutterudite powder is installed in a graphite mold, and the bulk material is prepared by SPS sintering, and the sintered skutterudite block is prepared The surface is polished clean and smooth with sandpaper, and the method for preparing Ni(Mo) alloy electrodes according to the above-mentioned electroplating method is first pretreated before plating, and then immersed in the plating solution to deposit electrodes. The preparation conditions are: the concentration of Ni ions in the plating solution is 60g / L, the concentration of Mo ions is 20g / L, the temperature is 35°C, and the current density is 10A / dm 2 , Plating time is 40min. The mole percentage of Mo in the prepared Ni(Mo) alloy electrode at the low temperature end is about 19%, and the thickness of the alloy electrode is about 25 μm;

[0067] At this time, the ...

Embodiment 2

[0069] Preparation of Ni(Mo) alloy electrodes at the high temperature end of skutterudite thermoelectric power generation elements by electroplating: Put the skutterudite powder material into the graphite mold, then spread Ti on the skutterudite as a transition layer, and prepare thermoelectric elements by SPS , the surface of the sample prepared by sintering was polished clean and smooth with sandpaper. At the high temperature end, that is, the surface of the transition layer Ti, the Ni(Mo) alloy electrode was prepared according to the above-mentioned electroplating method, firstly pretreated before plating, and then immersed in the plating solution to deposit the electrode , the preparation conditions are: the concentration of Ni ions in the plating solution is 60g / L, the concentration of Mo ions is 20g / L, the temperature is 35°C, and the current density is 10A / dm 2 , Plating time is 40min. The mole percentage of Mo in the prepared high-temperature end Ni(Mo) alloy electrode...

Embodiment 3

[0072] Preparation of Ni(W) alloy electrodes at the high and low temperature end of skutterudite thermoelectric generation elements by electroplating: Put the skutterudite powder material into the graphite mold, then spread Ti powder on the skutterudite as a transition layer, and prepare it by SPS For thermoelectric elements, the surface of the sample prepared by sintering is polished clean and smooth with sandpaper, and the Ni(W) alloy electrode is prepared on the surface of the low-temperature end, that is, the surface of the skutterudite matrix material according to the above-mentioned electroplating method, first pre-treated before plating, and then immersed in the plating solution Deposit the electrode in the middle; on the high temperature end, that is, the surface of the transition layer Ti, prepare the Ni(W) alloy electrode according to the above-mentioned electroplating method, first undergo pre-plating pretreatment, and then immerse in the plating solution to deposit t...

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Abstract

The invention relates to an alloy electrode for a skutterudite thermoelectric element and a preparation method thereof. The alloy electrode provided by the invention is an alloy electrode deposited at two end parts of the skutterudite thermoelectric element. The alloy electrode is made of a Ni-Mo alloy or a Ni-W alloy, wherein the molar percentage content of Mo in the Ni-Mo alloy is 10%-40%, the molar percentage content of W in the Ni-W alloy is 5%-40%. In the invention, the selected electrode material is a Ni(Mo) or Ni(W) alloy electrode prepared through an electroplating or chemical plating method. The alloy electrode is good in conductivity and excellent in weldability, the coefficient of thermal expansion of a Ni-containing electrode can be adjusted through substances with a small coefficient of thermal expansion such as Mo and W, and the difference between the electrode material and a skutterudite thermoelectric material in coefficient of thermal expansion is reduced.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric power generation, and relates to an electrode material and an electrode connection method for high and low temperature ends of a skutterudite thermoelectric element, in particular to a mass production of elements and a method for preparing electrodes of special-shaped elements. Background technique [0002] With the rapid development of the world economy, energy shortages and environmental problems have become increasingly prominent, making the development and utilization of clean energy, renewable energy and low-grade thermal energy (such as industrial waste heat, waste heat, geothermal and solar energy) and energy conversion technologies more and more popular. attention. Thermoelectric conversion technology utilizes the Seebeck effect of semiconductor materials to realize the direct conversion of heat energy and electrical energy, and is an environmentally friendly energy-saving technolog...

Claims

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Application Information

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IPC IPC(8): H01L35/04H01L35/34
Inventor 黄向阳师兰芳万舜唐云山顾明陈立东岛田武司後藤良
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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