Highly Porous Thermoelectric Nanocomposites with LowThermalConductivityand High Figure of Merit from Large-Scale Solution-Synthesized Bi2Te2.5Se0.5HollowNanostructures
- Iowa State Univ., Ames, IA (United States). Dept. of Chemical and Biological Engineering
- Purdue Univ., West Lafayette, IN (United States). Dept. of Mechanical Engineering
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
- Ames Lab., Ames, IA (United States). Dept. of Energy
Abstract To enhance the performance of thermoelectric materials and enable access to their widespread applications, it is beneficial yet challenging to synthesize hollow nanostructures in large quantities, with high porosity, low thermal conductivity ( κ ) and excellent figure of merit ( z T ). Herein we report a scalable (ca. 11.0 g per batch) and low‐temperature colloidal processing route for Bi 2 Te 2.5 Se 0.5 hollow nanostructures. They are sintered into porous, bulk nanocomposites (phi 10 mm× h 10 mm) with low κ (0.48 W m −1 K −1 ) and the highest z T (1.18) among state‐of‐the‐art Bi 2 Te 3− x Se x materilas. Additional benefits of the unprecedented low relative density (68–77 %) are the large demand reduction of raw materials and the improved portability. This method can be adopted to fabricate other porous phase‐transition and thermoelectric chalcogenide materials and will pave the way for the implementation of hollow nanostructures in other fields.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- N00014-16-1-2066; HR0011-15-2-0037; SC0001299; AC02-07CH11358
- OSTI ID:
- 1355755
- Alternate ID(s):
- OSTI ID: 1400464
- Report Number(s):
- IS-J 9307
- Journal Information:
- Angewandte Chemie, Vol. 129, Issue 13; ISSN 0044-8249
- Publisher:
- German Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nanocomposites from Solution-Synthesized PbTe-BiSbTe Nanoheterostructure with Unity Figure of Merit at Low-Medium Temperatures (500-600 K)
Prediction of Bi2Te3-Sb2Te3 Interfacial Conductance and Superlattice Thermal Conductivity Using Molecular Dynamics Simulations