Bi-Te热电材料在乙二醇中的电沉积- bicl 3 -TeCl4无水的解决方案

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Transactions Pub Date : 2023-10-01 DOI:10.2320/matertrans.mt-m2023080

Hiroaki Yamamoto, Masamori Akiguchi, Hiroki Kominato, Ai Nozaki, Masao Morishita

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引用次数: 0

摘要

在393 K条件下，采用恒流电解和恒电位电解的方法研究了铋碲热电材料在乙二醇-BiCl3-TeCl4非水溶液中的电沉积。控制电解液中BiCl3与TeCl4的摩尔比和电解条件，电沉积了不同成分的Bi-Te合金。在电流密度为20 A·m−2、BiCl3与TeCl4摩尔比为50:1的97.50 mol%EG-2.45 mol%BiCl3 - 0.05 mol%TeCl4液中，得到的电镀层的组成为40.14 mol% Bi-59.86 mol%Te，与Bi2Te3相近。该镀层在给定温差下表现为n型热电转换，Seebeck系数为- 145µV K−1。

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Electrodeposition of Bi–Te Thermoelectric Material in Ethylene Glycol-BiCl3–TeCl4 Non-Aqueous Solution

The electrodeposition of bismuth–tellurium thermoelectric material was investigated by galvanostatic and potentiostatic electrolysis in ethylene glycol (EG)-BiCl3–TeCl4 non-aqueous solutions at 393 K. Controlling the molar ratio of BiCl3 to TeCl4 in the bath and the electrolysis conditions, the Bi–Te alloys with various compositions were electrodeposited. The composition of the electrodeposit obtained in the 97.50 mol%EG-2.45 mol%BiCl3–0.05 mol%TeCl4 bath with the BiCl3 to TeCl4 molar ratio of 50:1 at the current density of 20 A·m−2 was 40.14 mol%Bi–59.86 mol%Te and close to that of Bi2Te3. This electrodeposit exhibited a n-type thermoelectric conversion for the given temperature difference and its Seebeck coefficient was −145 µV K−1.

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