Enhanced Thermoelectric Properties of Hydrothermal Synthesized BiCl3/Bi2S3 Composites

Wei WANG; Shi-Jie LUO; Cong XIAN; Qun XIAO; Yang YANG; Yun OU; Yun-Ya LIU; Shu-Hong XIE; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]; [in Chinese]

doi:10.15541/jim20180261

Journals >Journal of Inorganic Materials >Volume 34 >Issue 3 >Page 328 > Article

Journal of Inorganic Materials
Vol. 34, Issue 3, 328 (2019)

Enhanced Thermoelectric Properties of Hydrothermal Synthesized BiCl₃/Bi₂S₃ Composites

Wei WANG¹, Shi-Jie LUO¹, Cong XIAN¹, Qun XIAO¹, Yang YANG², Yun OU³, Yun-Ya LIU¹, Shu-Hong XIE⁴, [in Chinese]¹, [in Chinese]¹, [in Chinese]¹, [in Chinese]¹, [in Chinese]², [in Chinese]³, [in Chinese]¹, and [in Chinese]⁴

Author Affiliations

¹1. Hunan Provincial Key Laboratory of Thin Film Materials and Devices, School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China

²2. Department of Mechanical Engineering, University of Washington, Seattle WA 98195-2600, USA

³3. Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiangtan 411201, China

⁴4. Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, Xiangtan 411105, China

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DOI: 10.15541/jim20180261 Cite this Article

Wei WANG, Shi-Jie LUO, Cong XIAN, Qun XIAO, Yang YANG, Yun OU, Yun-Ya LIU, Shu-Hong XIE, [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Enhanced Thermoelectric Properties of Hydrothermal Synthesized BiCl₃/Bi₂S₃ Composites[J]. Journal of Inorganic Materials, 2019, 34(3): 328 Copy Citation Text

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XRD patterns (a) and the enlarged patterns of 2θ in the range of 24°-32.5°(b) with peaks of crystal plane (211) in the inset for BiCl3/Bi2S3 powders with different xmol% (x= 0, 0.25, 0.5, and 1.0) BiCl3

. XRD patterns (a) and the enlarged patterns of 2θ in the range of 24°-32.5°(b) with peaks of crystal plane (211) in the inset for BiCl₃/Bi₂S₃ powders with different xmol% (x= 0, 0.25, 0.5, and 1.0) BiCl₃

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$SEM images of Bi2S3 powders (a), fractured surfaces of SPSed samples of Bi2S3 doped with xmol% BiCl3 ((b) x=0, (c) x=0.25, (d) x=0.5, (e) x=1.0); TEM images of sintered samples of Bi2S3 doped with xmol% BiCl3 ((f) x=0, (h) x=1.0); HRTEM image of Bi2S3 powder after SPS (g)$

. SEM images of Bi₂S₃ powders (a), fractured surfaces of SPSed samples of Bi₂S₃ doped with xmol% BiCl₃((b) x=0, (c) x=0.25, (d) x=0.5, (e) x=1.0); TEM images of sintered samples of Bi₂S₃ doped with xmol% BiCl₃((f) x=0, (h) x=1.0); HRTEM image of Bi₂S₃ powder after SPS (g)

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$SEM image of the fractured surfaces of Bi2S3 doped with 1.0mol% BiCl3 bulk after SPS (a), corresponding elemental mappings of Bi, S and Cl (b-d)$

. SEM image of the fractured surfaces of Bi₂S₃ doped with 1.0mol% BiCl₃ bulk after SPS (a), corresponding elemental mappings of Bi, S and Cl (b-d)

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. Temperature dependence of thermoelectric performances for BiCl₃/Bi₂S₃ composite samples
(a) Seebeck coefficient; (b) Electrical conductivity; (c) Power factor; (d) Total thermal conductivity; (e) Lattice thermal conductivity; (f) Figure of merit (ZT)

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Sample	ρ/%	S/(µV·K^-1)	σ/(S·cm^-1)	PF/(μW·m^-1·K^-2)	κ/(W·m^-1·K^-1)	ZT
Bi₂S₃	89%	-326.0	12.9	136.9	0.47	0.22
Bi₂S₃+0.25% BiCl₃	90%	-304.0	27.6	255.0	0.31	0.63
Bi₂S₃+0.5% BiCl₃	89%	-279.0	45.1	350.2	0.58	0.46
Bi₂S₃+1.0% BiCl₃	92%	-273.5	25.4	189.7	0.49	0.30