期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 42, 页码 23694-23699出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b07596
关键词
nanostructure engineering; Bi2Te3; low thermal conductivity; enhanced thermoelectric properties
资金
- Australian Research Council
- QLD government [2011002414]
N-type Bi2Te3 nanostructures were synthesized using a solvothermal method and in turn sintered using sparking plasma sintering. The sintered n-type Bi2Te3 pellets reserved nanosized grains and showed an ultralow lattice thermal conductivity (similar to 0.2 W m(-1) K-1), which benefits from high-density small-angle grain boundaries accommodated by dislocations. Such a high phonon scattering leads an enhanced ZT of 0.88 at 400 K. This study provides an efficient method to enhance thermoelectric performance of thermoelectric nanomaterials through nanostructure engineering, making the asprepared n-type nanostructured Bi2Te3 as a promising candidate for room-temperature thermoelectric power generation and Peltier cooling.
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