Enhanced thermoelectric performance of BiSbTe alloy: Energy filtering effect of nanoprecipitates and the effect of SiC nanoparticles

Energy Filtering ◽

24 month high-ZT stability of Bi0.5Sb1.5Te3/Sb2O3 nanocomposites that demonstrate simultaneous Seebeck coefficient enhancement and thermal conductivity decline through energy filtering effect.

Effect of crystal size distribution on thermoelectric performance for Lanthanum-doped strontium titanate bulk material

Functional Materials Letters ◽

10.1142/s1793604715500708 ◽

2015 ◽

Vol 08 (06) ◽

pp. 1550070

Author(s):

Boyu Zhang ◽

Jun Wang ◽

Xinba Yaer ◽

Zhenzhen Huo ◽

Yin Wu ◽

...

Keyword(s):

Size Distribution ◽

Strontium Titanate ◽

Crystal Size ◽

Bulk Material ◽

Crystal Size Distribution ◽

Potential Barriers ◽

Seebeck Coefficients ◽

Energy Filtering ◽

Effect of crystal size distribution on thermoelectric performance of Lanthanum-doped strontium titanate ( La - SrTiO 3) ceramics are investigated in this study. Thermoelectric performance measurement, coupled with microstructure studies, shows that the electrical conductivity strongly depends on the crystal size, potential barrier on the grain boundary and porosity. Meantime, because the average potential barriers height are increased along with the reduction of crystal size, the Seebeck coefficients are increased by energy filtering effect at the large number of grain boundaries. As a result, by controlling of crystal size distribution, ZT value of La - SrTiO 3 is improved.

Enhanced thermoelectric performance via carrier energy filtering effect in β-Zn4Sb3 alloy bulk embedded with (Bi2Te3)0.2(Sb2Te3)0.8

Journal of Applied Physics ◽

10.1063/1.4864220 ◽

2014 ◽

Vol 115 (5) ◽

pp. 053710 ◽

Cited By ~ 29

Author(s):

T. H. Zou ◽

X. Y. Qin ◽

D. Li ◽

B. J. Ren ◽

G. L. Sun ◽

...

Keyword(s):

Energy Filtering ◽

Carrier Energy ◽

Thermoelectric all-carbon heterostructures for a flexible thermoelectric generator

Sustainable Energy & Fuels ◽

10.1039/d0se01591a ◽

2021 ◽

Vol 5 (1) ◽

pp. 267-273

Author(s):

Hyeonseok Hwang ◽

Kwang-Suk Jang

Keyword(s):

Carbon Nanotubes ◽

High Performance ◽

Thermoelectric Generator ◽

Carbon Nanoparticle ◽

Energy Filtering ◽

Filtering Effect ◽

Flexible Thermoelectric

High-performance thermoelectric all-carbon heterostructures are investigated. The carbon nanoparticle barrier between carbon nanotubes can enhance the thermoelectric performance due to the energy filtering effect.

Enhanced thermoelectric properties of nano-SiC dispersed NaCo2O4 composites

Functional Materials Letters ◽

10.1142/s1793604719500097 ◽

2019 ◽

Vol 12 (02) ◽

pp. 1950009 ◽

Cited By ~ 1

Author(s):

Wei Zhang ◽

Kongjun Zhu ◽

Jinsong Liu ◽

Jing Wang ◽

Kang Yan ◽

...

Keyword(s):

Crystal Structure ◽

Thermal Conductivity ◽

Electrical Conductivity ◽

High Temperature ◽

Cobalt Oxides ◽

Solid State Method ◽

Sic Nanoparticles ◽

Energy Filtering ◽

State Method ◽

Sodium cobalt oxides (NaCo2O[Formula: see text] have attracted considerable attention as promising high-temperature thermoelectric (TE) candidates. In this study, we choose nano-SiC as an inclusion to synthesize NaCo2O4-based composites using the solid-state method. The crystal structure and TE properties for nano-SiC dispersed NaCo2O4 composites with different SiC contents are discussed. The results indicate that the SiC nanoparticles can suppress the grain growth and form many new grain boundaries and interface to reduce thermal conductivity observably. Moreover, the electrical conductivity and Seebeck coefficient can be improved by the energy filtering effect. Therefore, the maximum ZT of 0.122 is obtained from the samples with 0.2[Formula: see text]vol.% nano-SiC, approximately two times higher than that of pure NaCo2O4. This study provides a facile strategy to synthesize nanocomposites to enhance TE performance efficiently.

Nanostructured SnSe integrated with Se quantum dots with ultrahigh power factor and thermoelectric performance from magnetic field-assisted hydrothermal synthesis

Journal of Materials Chemistry A ◽

10.1039/c9ta03967h ◽

2019 ◽

Vol 7 (26) ◽

pp. 15757-15765 ◽

Cited By ~ 12

Author(s):

Rui Xu ◽

Lulu Huang ◽

Jian Zhang ◽

Di Li ◽

Jizi Liu ◽

...

Keyword(s):

Magnetic Field ◽

Quantum Dots ◽

Hydrothermal Synthesis ◽

Density Of States ◽

Power Factor ◽

Energy Filtering ◽

Filtering Effect ◽

Nano Grains

Through magnetic field-assisted hydrothermal synthesis, high thermoelectric performance of SnSe is obtained due to Se quantum dots and smaller nano grains, leading to enhanced density of states and energy filtering effect.

Tuning SnSe/SnS hetero-interfaces to enhance thermoelectric performance

Functional Materials Letters ◽

10.1142/s1793604718500698 ◽

2018 ◽

Vol 11 (04) ◽

pp. 1850069 ◽

Cited By ~ 3

Author(s):

Xuerui Liu ◽

Shuankui Li ◽

Tinyang Liu ◽

Weiming Zhu ◽

Rui Wang ◽

...

Keyword(s):

Thermal Conductivity ◽

Thermoelectric Materials ◽

High Performance ◽

Multiple Scales ◽

Phonon Transport ◽

Energy Filtering ◽

Promising Strategy ◽

Filtering Effect ◽

Heterogeneous Nanostructure

With the development of nanotechnology, thermoelectric materials with complex heterogeneous nanostructure offer a promising approach to improve the thermoelectric performance. In this work, SnSe/SnS hetero-nanosheet was tuned by the epitaxial growth of SnSe on the few layers of SnS nanosheets. The heterojunction interface can optimize the carrier/phonon transport behavior by energy filtering effect and scattering the phonon in multiple scales. Compared with pristine SnSe, the power factor of SnSe/SnS hetero-nanosheet increases from 2.2[Formula: see text][Formula: see text]V/cmK2 to 3.21[Formula: see text][Formula: see text]V/cmK2 at 773[Formula: see text]K, whereas the thermal conductivity decreases significantly from 0.65[Formula: see text]W[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] to 0.48[Formula: see text]W[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text] at 773[Formula: see text]K. The maximum ZT of 0.5 is obtained at 773[Formula: see text]K in the SnSe/SnS hetero-nanosheets, which is 89% higher than pristine SnSe. This approach is proved to be a promising strategy to design high performance thermoelectric materials.