Institutional Repository of Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Anhui, Peoples R China
Revisiting AgCrSe2 as a promising thermoelectric material | |
Wu, Di1; Huang, Sizhao1; Feng, Dan1; Li, Bing2; Chen, Yuexing1; Zhang, Jian1,3; He, Jiaqing1 | |
2016-09-14 | |
发表期刊 | PHYSICAL CHEMISTRY CHEMICAL PHYSICS |
摘要 | We revisited and investigated a layer-structured thermoelectric material AgCrSe2, which has an extremely low thermal conductivity. After using both differential scanning calorimetry and a comparative laser flash method, we realized that the specific heat of this material, the main contributor to the reported low thermal conductivity, is unlikely to be way below the Dulong-Petit limit as revealed in the literature. Besides, our in situ X-ray diffraction pattern up to 873 K indicated the instability of AgCrSe2 over 723 K, where it begins to decompose into Cr2Se3 and Ag2Se. This unexpected decomposition phenomenon resulted in the gradual increment of specific heat and thermal diffusivity, hence the deterioration of the overall thermoelectric performance. We deliberately introduced Ag and Cr vacancies into the lattice for carrier concentration optimization and could achieve an optimal figure of merit of ZT similar to 0.5 at 723 K in the nominal composition Ag0.96CrSe2 in the direction perpendicular to the sintering press. Our findings suggest that more thorough investigations are necessary to ensure that AgCrSe2 is a promising thermoelectric material. |
文章类型 | Article |
WOS标题词 | Science & Technology ; Physical Sciences |
DOI | 10.1039/c6cp04791b |
关键词[WOS] | PERFORMANCE BULK THERMOELECTRICS ; THERMAL-CONDUCTIVITY ; HIERARCHICAL ARCHITECTURES ; COMPOSITES ; EFFICIENCY ; TELLURIDE ; ORIGIN ; ALLOYS ; CUCRS2 ; PHASE |
收录类别 | SCI |
语种 | 英语 |
项目资助者 | South University of Science and Technology of China ; South University of Science and Technology of China ; South University of Science and Technology of China ; South University of Science and Technology of China ; NSFC(11504160) ; NSFC(11504160) ; NSFC(11504160) ; NSFC(11504160) ; National 1000 Plan for Young Scientists ; National 1000 Plan for Young Scientists ; National 1000 Plan for Young Scientists ; National 1000 Plan for Young Scientists ; Science, Technology and Innovation Commission of Shenzhen Municipality(JCYJ 20140612140151884 ; Science, Technology and Innovation Commission of Shenzhen Municipality(JCYJ 20140612140151884 ; Science, Technology and Innovation Commission of Shenzhen Municipality(JCYJ 20140612140151884 ; Science, Technology and Innovation Commission of Shenzhen Municipality(JCYJ 20140612140151884 ; KQCX2015033110182370) ; KQCX2015033110182370) ; KQCX2015033110182370) ; KQCX2015033110182370) |
WOS研究方向 | Chemistry ; Physics |
WOS类目 | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
WOS记录号 | WOS:000382107200049 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/24643 |
专题 | 中科院固体物理研究所 |
作者单位 | 1.South Univ Sci, Shenzhen Key Lab Thermoelect Mat, Dept Phys, Technol China, Shenzhen 518055, Peoples R China 2.Japan Atom Energy Agcy, Japan Proton Accelerator Res Complex, Tokai, Ibaraki 3191195, Japan 3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230032, Peoples R China |
推荐引用方式 GB/T 7714 | Wu, Di,Huang, Sizhao,Feng, Dan,et al. Revisiting AgCrSe2 as a promising thermoelectric material[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2016,18(34):23872-23878. |
APA | Wu, Di.,Huang, Sizhao.,Feng, Dan.,Li, Bing.,Chen, Yuexing.,...&He, Jiaqing.(2016).Revisiting AgCrSe2 as a promising thermoelectric material.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,18(34),23872-23878. |
MLA | Wu, Di,et al."Revisiting AgCrSe2 as a promising thermoelectric material".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18.34(2016):23872-23878. |
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