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- W2759639969 abstract "Abstract Cu 1.8 S is a promising thermoelectric material with characteristics of superionic conductors. This study has been focused on the effect of Ti 4+ doping on both electron and phonon transport properties of Ti x Cu 1.8- x S ( x = 0, 0.04, 0.07, 0.10). The thermoelectric figure of merit ( ZT ) was greatly enhanced when 0.07 ≤ x ≤ 0.10, mainly due to a decreased thermal conductivity (0.62–0.77 Wm −1 K −1 ) caused by the formation of the lower-conductive Cu 4 (TiS 4 ) and Cu 1.96 S second phases, and the introduced point defects. Along with an improved Seebeck coefficient, a peak ZT value of 0.54 at 673 K was obtained in the Ti 0.07 Cu 1.73 S composition, which is twice as large as that of the undoped one. A maximum efficiency of about 3.7% at T h = 673 K with a proper output power density ( P d ∼0.56 Wcm −2 ) was obtained. Our results indicate that the introduction of Ti 4+ in copper sulfide thermoelectric materials is an effective and convenient strategy to improve ZT by decreasing thermal conductivity." @default.
- W2759639969 created "2017-10-06" @default.
- W2759639969 creator A5006184120 @default.
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- W2759639969 date "2018-01-01" @default.
- W2759639969 modified "2023-09-24" @default.
- W2759639969 title "Enhanced thermoelectric properties of Cu1.8S by Ti-doping induced secondary phase" @default.
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- W2759639969 doi "https://doi.org/10.1016/j.jallcom.2017.09.305" @default.
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