Synergistic Optimization of Thermoelectric Performance in P-Type Bi0.48Sb1.52Te3/Graphene Composite

We report the synergistic optimization of the thermoelectric properties in p-type Bi0.48Sb1.52Te3 by the additional graphene. Highly dense Bi0.48Sb1.52Te3 + graphene (x wt%, x = 0, 0.05, 0.1 and 0.15) composites have been synthesized by zone-melting followed by spark plasma sintering. With the help of scanning electron microscopy, the graphene has been clearly observed at the edge of the grain in the composites. Due to the additional graphene, the composites show an improved power factor of 4.8 × 10−3 Wm−1K−2 with modified carrier concentration and suppressed lattice thermal conductivity. Consequently, synergistic optimization in electrical and lattice properties by additional graphene leads to a great improvement in the figure of merit ZT (1.25 at 320 K).

[1]  Qi Zhang,et al.  Thermoelectric Devices for Power Generation: Recent Progress and Future Challenges   , 2016 .

[2]  G. J. Snyder,et al.  Dense dislocation arrays embedded in grain boundaries for high-performance bulk thermoelectrics , 2015, Science.

[3]  S. Baik,et al.  Enhanced thermoelectric performance of Bi0.5Sb1.5Te3-expanded graphene composites by simultaneous modulation of electronic and thermal carrier transport , 2015 .

[4]  Lianjun Wang,et al.  Improved Thermoelectric Performance of Silver Nanoparticles‐Dispersed Bi2Te3 Composites Deriving from Hierarchical Two‐Phased Heterostructure , 2015 .

[5]  Lianjun Wang,et al.  Preparation of 1-D/3-D structured AgNWs/Bi2Te3 nanocomposites with enhanced thermoelectric properties , 2014 .

[6]  Jun Jiang,et al.  Enhanced thermoelectric figure of merit in p-type Bi0.48Sb1.52Te3 alloy with WSe2 addition , 2014 .

[7]  Soon-Mok Choi,et al.  Thermoelectric properties of unoxidized graphene/Bi2Te2.7Se0.3 composites synthesized by exfoliation/re‐assembly method , 2014 .

[8]  H. Goldsmid,et al.  Bismuth Telluride and Its Alloys as Materials for Thermoelectric Generation , 2014, Materials.

[9]  G. Cao,et al.  Enhanced thermoelectric properties of p-type CoSb3/graphene nanocomposite , 2013 .

[10]  X. Su,et al.  In situ synthesis and thermoelectric properties of PbTe–graphene nanocomposites by utilizing a facile and novel wet chemical method , 2013 .

[11]  Chongyin Yang,et al.  Thermoelectric properties of CuInTe2/graphene composites , 2013 .

[12]  Jun Jiang,et al.  Enhanced thermoelectric performance in n-type Bi2Te2.994Cl0.006/In2Te3 composite , 2013 .

[13]  Jun Jiang,et al.  In situ precipitation of Te nanoparticles in p-type BiSbTe and the effect on thermoelectric performance. , 2013, ACS applied materials & interfaces.

[14]  Heng Wang,et al.  The Criteria for Beneficial Disorder in Thermoelectric Solid Solutions , 2013 .

[15]  Jun Jiang,et al.  Effect of dehydrated-attapulgite nanoinclusions on the thermoelectric properties of BiSbTe alloys , 2013 .

[16]  Woochul Kim,et al.  Enhanced thermoelectric properties of tungsten disulfide-multiwalled carbon nanotube composites , 2012 .

[17]  Timothy P. Hogan,et al.  Raising the thermoelectric performance of p-type PbS with endotaxial nanostructuring and valence-band offset engineering using CdS and ZnS. , 2012, Journal of the American Chemical Society.

[18]  M. Kanatzidis,et al.  Nanostructures boost the thermoelectric performance of PbS. , 2011, Journal of the American Chemical Society.

[19]  Wei Li,et al.  Enhanced thermoelectric performance in p-type BiSbTe bulk alloy with nanoinclusion of ZnAlO , 2011 .

[20]  Zhenxiang Cheng,et al.  Electronic structure and thermoelectric properties of Bi2Te3 crystals and graphene-doped Bi2Te3 , 2010 .

[21]  Q. Ramasse,et al.  Structure of the (0001) basal twin boundary in Bi2Te3 , 2010 .

[22]  A. Srivastava,et al.  A facile and novel synthesis of Ag-graphene-based nanocomposites. , 2009, Small.

[23]  M. Dresselhaus,et al.  Structure study of bulk nanograined thermoelectric bismuth antimony telluride. , 2009, Nano letters.

[24]  Jingfeng Li,et al.  Effect of mixed grain sizes on thermoelectric performance of Bi2Te3 compound , 2009 .

[25]  G. J. Snyder,et al.  Thermoelectric performance of lanthanum telluride produced via mechanical alloying , 2008 .

[26]  L. Bell.  Cooling, Heating, Generating Power, and Recovering Waste Heat with Thermoelectric Systems , 2008, Science.

[27]  G. J. Snyder,et al.  Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States , 2008, Science.

[28]  Gang Chen,et al.  Enhanced thermoelectric figure-of-merit in p-type nanostructured bismuth antimony tellurium alloys made from elemental chunks. , 2008, Nano letters.

[29]  Min Zhou,et al.  Thermoelectric and mechanical properties of nano-SiC-dispersed Bi2Te3 fabricated by mechanical alloying and spark plasma sintering , 2008 .

[30]  M. Dresselhaus,et al.  High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys , 2008, Science.

[31]  E. Toberer,et al.  Complex thermoelectric materials. , 2008, Nature materials.

[32]  Jun Jiang,et al.  Preparation and Properties of p-Type (Bi2Te3)x(Sb2Te3)1−x Thermoelectric Materials , 2005 .

[33]  Jun Jiang,et al.  Thermoelectric properties of p-type (Bi2Te3)x(Sb2Te3)1−x crystals prepared via zone melting , 2005 .

[34]  R. Venkatasubramanian,et al.  Thin-film thermoelectric devices with high room-temperature figures of merit , 2001, Nature.

[35]  F. Tuinstra,et al.  Raman Spectrum of Graphite , 1970 .

[36]  Gaojie Xu,et al.  Enhanced thermoelectric figure of merit in p-type BiSbTeSe alloy with ZnSb addition , 2013 .

[37]  H. A. Hassan,et al.  THERMOELECTRIC PROPERTIES OF p-TYPE , 2012 .

[38]  Jun Jiang,et al.  Preparation and Properties of p-Type ( Bi 2 Te 3 ) x ( Sb 2 Te 3 ) 1 x Thermoelectric Materials , 2005 .

[39]  David Michael Rowe,et al.  Recent developments in thermoelectric materials , 1986 .