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

Year: 2023

Type: article

Abstract: 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.

Source: MATERIALS TRANSACTIONS

DOI: 10.2320/matertrans.mt-m2023080

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

Institutions: University of Hyogo, Hyogo University

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

OpenAlex ID: W4386993192

FWCI:

Cites: 21

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Related to: 10