scholarly journals High performance polypyrrole/SWCNTs composite film as a promising organic thermoelectric material

RSC Advances ◽  
2021 ◽  
Vol 11 (29) ◽  
pp. 17704-17709
Author(s):  
Zhaohua Liu ◽  
Jiye Sun ◽  
Haijun Song ◽  
Yicheng Pan ◽  
Yufei Song ◽  
...  
Keyword(s):  
Low Temperature ◽  
Composite Film ◽  
Thermoelectric Material ◽  
High Performance ◽  
Interfacial Polymerization ◽  
Composite Films ◽  
Thermoelectric Performance

PPy/SWCNTs composite films with high thermoelectric performance were prepared by chemical interfacial polymerization under a controlled low temperature.

scholarly journals Boosting Performance of Self-Polarized Fully Printed Piezoelectric Nanogenerators via Modulated Strength of Hydrogen Bonding Interactions

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1908
Author(s):  
Hai Li ◽  
Sooman Lim
Keyword(s):  
Hydrogen Bonding ◽  
Composite Film ◽  
High Performance ◽  
Composite Films ◽  
Β Phase ◽  
Hydrogen Bonding Interactions ◽  
Barium Titanate Nanoparticles ◽  
Surface Modified ◽  
Piezoelectric Devices ◽  
Piezoelectric Nanogenerators

Self-polarized piezoelectric devices have attracted significant interest owing to their fabrication processes with low energy consumption. Herein, novel poling-free piezoelectric nanogenerators (PENGs) based on self-polarized polyvinylidene difluoride (PVDF) induced by the incorporation of different surface-modified barium titanate nanoparticles (BTO NPs) were prepared via a fully printing process. To reveal the effect of intermolecular interactions between PVDF and NP surface groups, BTO NPs were modified with hydrophilic polydopamine (PDA) and hydrophobic 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES) to yield PDA-BTO and PFD-BTO, respectively. This study demonstrates that the stronger hydrogen bonding interactions existed in PFD-BTO/PVDF composite film comparative to the PDA-BTO/PVDF composite film induced the higher β-phase formation (90%), which was evidenced by the XRD, FTIR and DSC results, as well as led to a better dispersion of NPs and improved mechanical properties of composite films. Consequently, PFD-BTO/PVDF-based PENGs without electric poling exhibited a significantly improved output voltage of 5.9 V and power density of 102 μW cm−3, which was 1.8 and 2.9 times higher than that of PDA-BTO/PVDF-based PENGs, respectively. This study provides a promising approach for advancing the search for high-performance, self-polarized PENGs in next-generation electric and electronic industries.

scholarly journals Actuation Behavior of Multilayer Graphene Nanosheets/Polydimethylsiloxane Composite Films

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1243 ◽  
Author(s):  
Chunmei Zhang ◽  
Tianliang Zhai ◽  
Chao Zhan ◽  
Qiuping Fu ◽  
Chao Ma
Keyword(s):  
Composite Film ◽  
High Performance ◽  
Graphene Nanosheets ◽  
Composite Films ◽  
Multilayer Graphene ◽  
Layer By Layer ◽  
Pdms Film ◽  
Out Of Plane ◽  
Dielectric Actuation ◽  
Electromechanical Actuation

The graphene nanosheets (GNS)/polydimethylsiloxane (PDMS) composite films with out-of-plane dielectric actuation behavior were prepared through a layer-by-layer spin coating process. The GNS-PDMS/PDMS composite films with 1~3 layers of GNS-PDMS films were spin coated on top of the PDMS film. The dielectric, mechanical, and electromechanical actuation properties of the composite films were investigated. The dielectric constant of the GNS-PDMS3/PDMS composite film at 1 kHz is 5.52, which is 1.7 times that of the GNS-PDMS1/PDMS composite film. The actuated displacement of the GNS-PDMS/PDMS composite films is greatly enhanced by increasing the number of GNS-PDMS layers. This study provides a novel alternative approach for fabricating high-performance actuators with out-of-plane actuation behavior.

scholarly journals Mechanically Robust Flexible Multilayer Aramid Nanofibers and MXene Film for High-Performance Electromagnetic Interference Shielding and Thermal Insulation

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3041
Author(s):  
Jun Zhou ◽  
Junsheng Yu ◽  
Dongyu Bai ◽  
Huili Liu ◽  
Lu Li
Keyword(s):  
Mechanical Properties ◽  
Composite Film ◽  
Electromagnetic Interference ◽  
Multilayer Structure ◽  
High Performance ◽  
Composite Films ◽  
Next Generation ◽  
Shielding Effectiveness ◽  
Breaking Strain ◽  
Practical Applications

In order to overcome the various defects caused by the limitations of solid metal as a shielding material, the development of electromagnetic shielding materials with flexibility and excellent mechanical properties is of great significance for the next generation of intelligent electronic devices. Here, the aramid nanofiber/Ti3C2Tx MXene (ANF/MXene) composite films with multilayer structure were successfully prepared through a simple alternate vacuum-assisted filtration (AVAF) process. With the intervention of the ANF layer, the multilayer-structure film exhibits excellent mechanical properties. The ANF2/MXene1 composite film exhibits a tensile strength of 177.7 MPa and a breaking strain of 12.6%. In addition, the ANF5/MXene4 composite film with a thickness of only 30 μm exhibits an electromagnetic interference (EMI) shielding efficiency of 37.5 dB and a high EMI-specific shielding effectiveness value accounting for thickness (SSE/t) of 4718 dB·cm2 g−1. Moreover, the composite film was excellent in heat-insulation performance and in avoiding light-to-heat conversion. No burning sensation was produced on the surface of the film with a thickness of only 100 μm at a high temperature of 130 °C. Furthermore, the surface of the film was only mild when touched under simulated sunlight. Therefore, our multilayer-structure film has potential significance in practical applications such as next-generation smart electronic equipment, communications, and military applications.

scholarly journals High thermoelectric performance of p-BiSbTe compounds prepared by ultra-fast thermally induced reaction

2017 ◽  
Vol 10 (12) ◽  
pp. 2638-2652 ◽  
Author(s):  
Gang Zheng ◽  
Xianli Su ◽  
Hongyao Xie ◽  
Yuejiao Shu ◽  
Tao Liang ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Thermoelectric Material ◽  
Conversion Efficiency ◽  
High Performance ◽  
Thermoelectric Performance ◽  
Thermally Induced ◽  
Induced Reaction

High performance Bi2Te3-based thermoelectric material and modules with a conversion efficiency of 5.2% under a temperature gradient of 250 K were synthesized by TIFS.

ChemInform Abstract: CsBi4Te6: A High-Performance Thermoelectric Material for Low-Temperature Applications.

ChemInform ◽  
2010 ◽  
Vol 31 (22) ◽  
pp. no-no
Author(s):  
Duck-Young Chung ◽  
Tim Hogan ◽  
Paul Brazis ◽  
Melissa Rocci-Lane ◽  
Carl Kannewurf ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thermoelectric Material ◽  
High Performance ◽  
Temperature Applications

Thermoelectric Potential of Bi and Bi1−x Sbx Nanowire Arrays

2001 ◽  
Vol 691 ◽  
Author(s):  
M. S. Dresselhaus ◽  
Y.-M. Lina ◽  
O. Rabin ◽  
S. B. Cronin ◽  
M. R. Black ◽  
...  
Keyword(s):  
Thermoelectric Material ◽  
High Performance ◽  
Wire Diameter ◽  
Nanowire Arrays ◽  
Thermoelectric Performance ◽  
The Wire ◽  
Low Dimensional

ABSTRACTThe potential of Bi and Bi1−x Sbx nanowire arrays for thermoelectric applications is discussed. The advantages of bismuth as a low dimensional thermoelectric material are enumerated and the role of modeling is emphasized. The advantages of using the Sb concentration as well as the wire diameter as materials parameters for optimizing the thermoelectric performance of these nanowires are discussed, with particular emphasis given to the development of a high performance p-type nanowire thermoelectric material.

scholarly journals Preparation and Characterization of Thermoelectric PEDOT/Te Nanorod Array Composite Films

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 148
Author(s):  
Hong-Ju Ahn ◽  
Seil Kim ◽  
Kwang Ho Kim ◽  
Joo-Yul Lee
Keyword(s):  
Composite Film ◽  
High Performance ◽  
Electrochemical Polymerization ◽  
Composite Films ◽  
Lithium Perchlorate ◽  
Nanorod Array ◽  
Energy Filtering ◽  
Carrier Energy ◽  
Galvanic Displacement Reaction ◽  
Filtering Effect

In this study, we prepared Te nanorod arrays via a galvanic displacement reaction (GDR) on a Si wafer, and their composite with poly(3,4-ethylenedioxythiophene) (PEDOT) were successfully synthesized by electrochemical polymerization with lithium perchlorate (LiClO4) as a counter ion. The thermoelectric performance of the composite film was optimized by adjusting the polymerization time. As a result, a maximum power factor (PF) of 235 µW/mK2 was obtained from a PEDOT/Te composite film electrochemically polymerized for 15 s at room temperature, which was 11.7 times higher than that of the PEDOT film, corresponding to a Seebeck coefficient (S) of 290 µV/K and electrical conductivity (σ) of 28 S/cm. This outstanding PF was due to the enhanced interface interaction and carrier energy filtering effect at the interfacial potential barrier between the PEDOT and Te nanorods. This study demonstrates that the combination of an inorganic Te nanorod array with electrodeposited PEDOT is a promising strategy for developing high-performance thermoelectric materials.

scholarly journals Study of Conventional Sintered Cu2Se Thermoelectric Material

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 401 ◽  
Author(s):  
Dongliang Shi ◽  
Zhiming Geng ◽  
Kwok Lam
Keyword(s):  
Thermoelectric Material ◽  
High Performance ◽  
Low Cost ◽  
Cost Effective ◽  
Industrial Applications ◽  
Lead Free ◽  
Thermoelectric Performance ◽  
Copper Chalcogenides ◽  
Conventional Sintering ◽  
Sintering Method

Lead-free thermoelectric material, copper chalcogenides, have been attracting much interest from many research and industrial applications owing to their high capability of harvesting energy from heat. The state-of-the-art copper chalcogenides are commonly fabricated by the spark plasma sintering (SPS) and hot pressing (HP) techniques. Those methods are still costly and complicated particularly when compared to the conventional solid-state sintering method. Here, we report an easy-to-fabricate lead-free copper(I)-selenium (Cu2Se) that was fabricated using the conventional sintering method. The fabrication conditions, including sintering temperature and dwelling time, have been systematically studied to optimize the thermoelectric performance of Cu2Se. The optimized zT value for the pure Cu2Se was found to be 1.2 for the sample sintered at 1173 K for 2 h. The study shows that Cu2Se developed using the simple and low-cost techniques could exhibit comparable thermoelectric performance when compared with those fabricated by the SPS method, which provides an alternative potential technique to synthesize high-performance thermoelectric materials in a cost-effective way for industrialization.

Discovery of low-temperature GeTe-based thermoelectric alloys with high performance competing with Bi2Te3

2020 ◽  
Vol 8 (4) ◽  
pp. 1660-1667 ◽  
Author(s):  
Longquan Wang ◽  
Junqin Li ◽  
Chunxiao Zhang ◽  
Teng Ding ◽  
Yucheng Xie ◽  
...  
Keyword(s):  
Low Temperature ◽  
Thermoelectric Material ◽  
High Performance

A kind of low-temperature thermoelectric material is discovered in quenched GeTe-based alloys with high performance superior to Bi2Te3-based alloys.

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