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Energies 2019, 12(3), 401;

Study of Conventional Sintered Cu2Se Thermoelectric Material

Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong
Author to whom correspondence should be addressed.
Received: 12 December 2018 / Revised: 11 January 2019 / Accepted: 15 January 2019 / Published: 27 January 2019
(This article belongs to the Section Advanced Energy Materials)
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Lead-free thermoelectric material, copper chalcogenides, have been attracting much interest from many research and industrial applications owing to their high capability of harvesting energy from heat. The state-of-the-art copper chalcogenides are commonly fabricated by the spark plasma sintering (SPS) and hot pressing (HP) techniques. Those methods are still costly and complicated particularly when compared to the conventional solid-state sintering method. Here, we report an easy-to-fabricate lead-free copper(I)-selenium (Cu2Se) that was fabricated using the conventional sintering method. The fabrication conditions, including sintering temperature and dwelling time, have been systematically studied to optimize the thermoelectric performance of Cu2Se. The optimized zT value for the pure Cu2Se was found to be 1.2 for the sample sintered at 1173 K for 2 h. The study shows that Cu2Se developed using the simple and low-cost techniques could exhibit comparable thermoelectric performance when compared with those fabricated by the SPS method, which provides an alternative potential technique to synthesize high-performance thermoelectric materials in a cost-effective way for industrialization. View Full-Text
Keywords: thermoelectric material; copper selenide; conventional sintering method thermoelectric material; copper selenide; conventional sintering method

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Shi, D.; Geng, Z.; Lam, K.H. Study of Conventional Sintered Cu2Se Thermoelectric Material. Energies 2019, 12, 401.

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