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Remarkably high thermoelectric performance of Cu2−xLixSe bulks with nanopores

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Abstract

Cu2Se is a p-type semiconducting compound that possesses excellent thermoelectric properties which exhibit great potential for practical applications. In recent years, there have been many ways to improve thermoelectric properties. Reducing the thermal conductivity is a very effective way to obtain high performance thermoelectric materials. In this study, a series of Cu2−xLixSe (x = 0, 0.01, 0.02 and 0.03) polycrystalline bulk samples were successfully prepared by hot-pressing the nanopowders made by hydrothermal synthesis to investigate the doping effects of Li on the phase structure, microstructure and thermoelectric properties of Cu2Se. Compared with the Li-free Cu2Se, the introduction of Li element increases the Seebeck coefficient. Importantly, both nanopores and Li substitution were observed which can reduce κL via increased scattering phonons. At 973 K, the Cu1.98Li0.02Se sample presented an excellent ZT of 2.14.

Graphical abstract: Remarkably high thermoelectric performance of Cu2−xLixSe bulks with nanopores

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Publication details

The article was received on 18 Jul 2018, accepted on 18 Oct 2018 and first published on 18 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA06912C
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Remarkably high thermoelectric performance of Cu2−xLixSe bulks with nanopores

    Q. Hu, Z. Zhu, Y. Zhang, X. Li, H. Song and Y. Zhang, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA06912C

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