Thermoelectric properties of n-type Sr x M y Co4Sb12 (M=Yb, Ba) double-filled skutterudites

被引：33

作者：

Bai, S. Q. ^{[1
,3
]}

Huang, X. Y. ^{[1
]}

Chen, L. D. ^{[1
]}

Zhang, W. ^{[2
]}

Zhao, X. Y. ^{[1
]}

Zhou, Y. F. ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, State Key Lab High Performance Ceram & Superfine, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2010年 / 100卷 / 04期

关键词：

TRANSPORT-PROPERTIES; HIGH FIGURE; MERIT;

D O I：

10.1007/s00339-010-5711-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alkaline-earth (AE) and rare-earth (RE) atoms are usually used as void fillers in the caged compound CoSb3 to improve the thermoelectric performance of the filled system. Polycrystalline single-filled Sr0.21Co4Sb12, double-filled Sr (x) Yb (y) Co4Sb12, and Sr (x) Ba (y) Co4Sb12 skutterudites have been synthesized. Rietveld structure refinement confirms that both Sr and Yb occupy the Sb-icosaedron voids in skutterudite frame work. In this paper, we report the high-temperature thermoelectric properties including electrical conductivity, Seebeck coefficient, and thermal conductivity. Double filling of the Sr-Yb combinations shows a stronger suppression on lattice thermal conductivity than that of Sr-Ba combination. Furthermore, the double-filled Sr (x) Yb (y) Co4Sb12 skutterudites exhibit a much higher power factor than the Sr-filled system. The maximum power factor for Sr0.22Yb0.03Co4Sb12.12 reaches 41 mu W cm(-1) K-2 at room temperature and 57.5 mu W cm(-1) K-2 at 850 K, respectively. The enhanced thermoelectric figures of merit are 1.32 for Sr (x) Yb (y) Co4Sb12 and 1.22 for Sr (x) Ba (y) Co4Sb12 at 850 K, respectively.

引用

页码：1109 / 1114

页数：6

共 24 条

[1] Enhanced thermoelectric performance of dual-element-filled skutterudites BaxCeyCo4Sb12 [J].

Bai, S. Q. ;

Pei, Y. Z. ;

Chen, L. D. ;

Zhang, W. Q. ;

Zhao, X. Y. ;

Yang, J. .

ACTA MATERIALIA, 2009, 57 (11) :3135-3139

[2]

BAI SQ, 2006, P 25 INT C THERM VIE, DOI DOI 10.1109/ICT.2006.331301

[3] Anomalous barium filling fraction and n-type thermoelectric performance of BayCo4Sb12 [J].

Chen, LD ;

Kawahara, T ;

Tang, XF ;

Goto, T ;

Hirai, T ;

Dyck, JS ;

Chen, W ;

Uher, C .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (04) :1864-1868

[4] Thermoelectric properties of the n-type filled skutterudite Ba0.3Co4Sb12 doped with Ni [J].

Dyck, JS ;

Chen, WD ;

Uher, C ;

Chen, L ;

Tang, XF ;

Hirai, T .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (06) :3698-3705

[5] A Rietveld-analysis program RIETAN-98 and its applications to zeolites [J].

Izumi, F ;

Ikeda, T .

EUROPEAN POWDER DIFFRACTION, PTS 1 AND 2, 2000, 321-3 :198-203

[6] Effect of partial void filling on the transport properties of NdxCo4Sb12 skutterudites [J].

Kuznetsov, VL ;

Kuznetsova, LA ;

Rowe, DM .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (29) :5035-5048

[7] High figure of merit in Eu-filled CoSb3-based skutterudites [J].

Lamberton, GA ;

Bhattacharya, S ;

Littleton, RT ;

Kaeser, MA ;

Tedstrom, RH ;

Tritt, TM ;

Yang, J ;

Nolas, GS .

APPLIED PHYSICS LETTERS, 2002, 80 (04) :598-600

[8] Cerium filling and doping of cobalt triantimonide [J].

Morelli, DT ;

Meisner, GP ;

Chen, BX ;

Hu, SQ ;

Uher, C .

PHYSICAL REVIEW B, 1997, 56 (12) :7376-7383

[9] High figure of merit in partially filled ytterbium skutterudite materials [J].

Nolas, GS ;

Kaeser, M ;

Littleton, RT ;

Tritt, TM .

APPLIED PHYSICS LETTERS, 2000, 77 (12) :1855-1857

[10] Thermoelectric properties of Sn-filled skutterudites [J].

Nolas, GS ;

Takizawa, H ;

Endo, T ;

Sellinschegg, H ;

Johnson, DC .

APPLIED PHYSICS LETTERS, 2000, 77 (01) :52-54

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