JOURNAL OF NANOPARTICLE RESEARCH
·
2020
·Vol. 22
·期 9
·1-14
·
IF 2.132
Li Ling,Jiang Xiangqian,Ban Chuncheng,Xie Dequan,Chen Weiping,Song Keguan,Liu Xiaowei
Thermoelectric (TE) material nanocomposite film is widely used in the design of many kinds of wearable flexible device and portable sensors. Herein, BNNT/Bi 2 Te 3 and BCNNT/Bi 2 Te 3 TE nanocomposite films were successfully fabricated by a cost-effective hot pressing and millipore membrane filter (HPMMF) method. Their thermoelectric performance was systematically investigated at room temperature, the highest power factor of the TE nanocomposite film was 1843.2 nW/mK 2 when the film contained 0.006 wt.% BCNNT. The Seebeck coefficient of the thermoelectric nanocomposite film will reach up 205 μV/K. The power factor of BCNNT/Bi 2 Te 3 TE nanocomposite film is 17.2 times higher than that of BNNT/Bi 2 Te 3 nanocomposite film and 14 times higher than that of Bi 2 Te 3 film. It is promising to be used in many situations such as flexible wearable device and solar cell thermoelectric power generation. Graphical abstract
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 20
·17367-17373
·
IF 2.324
Tian Zi-Han,Liu Hai-Hui,Wang Ning,Liu Yan-Xin,Zhang Xing-Xiang
Poly (3,4-ethylenedioxythiophene) nanowires (PEDOT NWs) with high electric conductivity were synthesized by a facile self-assembled micellar soft-template method. And then, Bi 2 Te 3 powders and Bi 2 Te 3 nanowires (Bi 2 Te 3 NWs) were added as inorganic filler to form the PEDOT NWs/inorganic nanocomposite films by a simple and convenient vacuum filtration method. The thermoelectric (TE) properties of the flexible films were characterized. PEDOT NWs film exhibited the high σ value of 249.5 S cm −1 and does not require any treatment at room temperature. By incorporating both Bi 2 Te 3 powders and Bi 2 Te 3 NWs into these PEDOT NWs, the power factor of the polymer/inorganic composite materials is enhanced. The resulting PEDOT NWs/Bi 2 Te 3 powders nanocomposite film exhibited a high power factor of 7.49 µW m −1 K −2 compared to that of 2.54 µW m −1 K −2 in PEDOT NWs. A maximum power factor of 9.06 µW m −1 K −2 is obtained from the PEDOT NWs/Bi 2 Te 3 NWs composite film containing 10 wt% Bi 2 Te 3 NWs at room temperature, which is about 3 of times that of the pure PEDOT NWs film. These composites provide a promising route to flexible and high-performance thermoelectric materials.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Jie Chen,Deyu Bao,Qiang Sun,Wei-Di Liu,Can Liu,Jun Tang,Lei Yang,Dali Zhou,Matthew S. Dargusch,Zhi-Gang Chen
To achieve the optimized performance and the widespread application of thermoelectric materials , it is crucial to decouple the highly interrelated thermoelectric parameters of materials. In this study, we illustrate that phonon and carrier transport properties of n-type Bi 2 Te 3 -based composites can be simultaneously optimized through alloying Cu 2 Se. Owing to the chemical reactions between the Bi 2 Te 3 matrix and the Cu 2 Se additives during the sample preparation, the carrier concentration and density-of-states effective mass can be tuned to optimize the carrier transport properties, while the lattice thermal conductivity can be reduced by introducing hierarchical structures including point defects , Cu 7 Te 5 inclusions, phase boundaries and localized Te-deficient regions. As a result, an enhanced thermoelectric performance is achieved compared with pristine Bi 2 Te 3 . Our study indicates the alloying Cu 2 Se can synergistically control the thermoelectric properties of Bi 2 Te 3 .
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 10
·1693
·
IF 5.719
Taifeng Shi,Mengran Chen,Zhenguo Liu,Qingfeng Song,Yixiang Ou,Haoqi Wang,Jia Liang,Qihao Zhang,Zhendong Mao,Zhiwen Wang,Jingyvan Zheng,Qingchen Han,Kafil M. Razeeb,Peng-an Zong
The past decades have witnessed surging demand for wearable electronics, for which thermoelectrics (TEs) are considered a promising self-charging technology, as they are capable of converting skin heat into electricity directly. Bi2Te3is the most-used TE material at room temperature, due to a high zT of ~1. However, it is different to integrate Bi2Te3for wearable TEs owing to its intrinsic rigidity. Bi2Te3could be flexible when made thin enough, but this implies a small electrical and thermal load, thus severely restricting the power output. Herein, we developed a Bi2Te3/nickel foam (NiFoam) composite film through solvothermal deposition of Bi2Te3nanoplates into porous NiFoam. Due to the mesh structure and ductility of Ni Foam, the film, with a thickness of 160 μm, exhibited a high figure of merit for flexibility, 0.016, connoting higher output. Moreover, the film also revealed a high tensile strength of 12.7 ± 0.04 MPa and a maximum elongation rate of 28.8%. In addition, due to the film’s high electrical conductivity and enhanced Seebeck coefficient, an outstanding power factor of 850 μW m−1K−2was achieved, which is among the highest ever reported. A module fabricated with five such n-type legs integrated electrically in series and thermally in parallel showed an output power of 22.8 nW at a temperature gap of 30 K. This work offered a cost-effective avenue for making highly flexible TE films for power supply of wearable electronics by intercalating TE nanoplates into porous and meshed-structure materials.
研究领域:
材料科学
·
能源技术
·
纳米科技
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 17
·2200555
·
IF 6.389
Zhendong Mao,Zhiwen Wang,Taifeng Shi,Peng-an Zong,Jia Liang,Zhenguo Liu,Peng Zhang,Yujia Huang,Yi Han,Kaleem Ahmad,Zeyad Almutairi,Chunlei Wan
Flexible thermoelectrics (TEs) that fit curved human skin well, could harvest energy from skin, and thus have been considered as a promising portable power source for wearable electronics. Bi 2 Te 3 , the most popular room-temperature TE material, is still challenging to be applied in flexible devices due to its rigid nature. Although many Bi 2 Te 3 -based films have been reported to be flexible when made thin enough, the thermal and electrical loads across them are rather small with severe limitation on the maximum power output. This work realizes a thick Bi 2 Te 3 -based TE film with a “graphene/Bi 2 Te 3 /graphene” sandwiched structure, which demonstrates an unprecedentedly high figure of merit for flexibility among all Bi 2 Te 3 -based films ever reported, due to the outstanding intrinsic flexibility of graphene and a small slippage barrier. Meanwhile, graphene acts as express conducting channels as well as carrier donors, resulting in an increased electrical conductivity. The numerous graphene/Bi 2 Te 3 heterointerfaces induce energy filtering effect, leading to an enhanced Seebeck coefficient, and thus an optimized power factor is achieved. This work offers a cost-effective avenue to make highly flexible TE films for power supply of wearable electronics by intercalating TE nanoplates into 2-dimensional nanosheets.
研究领域:
材料科学
·
纳米技术
·
能源工程
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2020
·
IF 5.797
Min Sun,Guowu Tang,Bowen Huang,Zhongjia Chen,Yu-Jun Zhao,Hanfu Wang,Ziwen Zhao,Dongdan Chen,Qi Qian,Zhongmin Yang
Bismuth telluride (Bi 2 Te 3 ) has attracted much attention in the field of thermoelectrics since it is one kind of commercial room-temperature thermoelectric material. Herein three kinds of Bi 2 Te 3 thermoelectric fibers with internal tensile stress are fabricated utilizing an optical fiber template method. The effects of internal stress on the microstructure and the electrical transportation of Bi 2 Te 3 thermoelectric fibers are investigated. The Bi 2 Te 3 cores in the fibers are highly crystalline and possess a tensile nanosheet structure with preferential orientation as evidenced by X-ray diffraction and Raman studies. Tensile stress can enhance electrical properties of the fibers. And a paper cup generator covered with 20 pieces of optimized fibers provides a μW-level output power. It is inferred that tensile stress tuning can be an effective tool for the material optimization of thermoelectric performance.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Deyu Bao,Jie Chen,Yuan Yu,Weidi Liu,Linsen Huang,Guang Han,Jun Tang,Dali Zhou,Lei Yang,Zhi-Gang Chen
In this study, Bi 2 Te 3 nanostructures were synthesized with controlled morphologies by using a solvothermal process and then sintered by spark plasma sintering to obtain bulk samples with controllable texture degrees. The sintered nanostructured Bi 2 Te 3 pellets show texture-dependent thermoelectric properties, in which their Seebeck coefficient, electrical conductivity and thermal conductivity can be optimized by the proper texture design to simultaneously secure a high carrier mobility and strong phonon scattering, resulting in a peak ZT value of ~0.69 at 333 K. This study reveals the potential of texture engineering in developing high performance anisotropic thermoelectric materials.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 5
·2697-2704
·
IF 1.491
Liu Shuai,Peng Nan,Bai Yu,Ma Dayan,Ma Fei,Xu Kewei
Cu-doped Bi 2 Te 3 hexagonal nanoplates were fabricated by a simple solvothermal method. Scanning electron microscopy and transmission electron microscopy characterization illustrated that the nanoplates are single-crystal ones with an average width of 300 nm and thickness in the range of 20–30 nm. It was demonstrated that Cu
x
Bi 2 Te 3 nanoplates possess the lowest thermal conductivity (0.8–1.2 W/m K) at 300 K, which is mainly due to the enhanced phonon scattering by grain boundaries. Furthermore, the doped Cu could evidently enhance the power factor of Bi 2 Te 3 through optimizing the carrier transport properties. As a result, Cu 0.02 Bi 2 Te 3 nanoplates exhibit the best thermoelectric performance with a figure of merit of 0.33, which is more than two times higher than that of Bi 2 Te 3 nanoplates.
研究领域:
材料科学
·
热电材料研究
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Wei Guo,Jianmin Ma,Wenjun Zheng
Bi 2 Te 3 assembled by disordered nanosheets with defects was prepared using a one-step easy synthesis strategy based on easy solvothermal synthesis routes. The high compatibile plane structure, minimization of nucleation and interfacial angle energies are the driving force of the crystal connection and the formation of the defects. To survey the impact of the defects on their thermoelectric properties, thermoelectric properties of bulk pellets have been investigated, and they exhibited preferable thermoelectric properties with a high ZT value of 0.68 due to its unique structural characteristics.
研究领域:
材料科学
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2022
·
IF 8.589
Xuedi Zhang,Jin Chen,Han Zhang,Pengfei Zhu,Rong Wang,Fu Li,Bo Li
Bi 2 Te 3 -based materials were prepared by direct ink writing (DIW) 3D printing and their microstructure and thermoelectric properties were investigated with an emphasis on the effect of the content of DMF and Te/Se addition. As the mass ratio of DMF in the composition increased from 6.5% to 8.0% (in mass), the electrical conductivity deteriorated because of the corresponding increased porosity and organic remains in the samples. However, the volatilization of DMF would reduce the fluidity of the slurry. Thus, thermoelectric slurry with 7.0% DMF is the most suitable mass ratio for 3D printing. Additionally, adding Te in the p-type Bi 0.4 Sb 1.6 Te 3 and adding Se in the n-type Bi 2 Te 2.6 Se 0.4 have significantly improved their electrical conductivity due to the increased carrier concentration and mobility. Combining with the moderate Seebeck coefficient (∼200 μV/K), high power factors with ∼802 μW·m −1 ·K −2 and 1266 μW·m −1 ·K −2 were obtained for the n-type Bi 2 Te 2.6 Se 0.4 +10%Se and p-type Bi 0.4 Sb 1.6 Te 3 +7%Te, respectively, which result in the final relatively high zT values of 0.68 at 573 K and 0.56 at 330 K for n-type and p-type 3D-printed samples.
研究领域:
材料科学
·
热电技术
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 21
·5562-5571
·
IF 7.779
Fudong Zhang,Xia Qi,Mingkai He,Fengshan Zheng,Lei Jin,Zhanhui Peng,Xiaolian Chao,Zupei Yang,Di Wu
Previous studies have revealed that both Bi doping and Bi2Te3 alloying are successful strategies to optimize the thermoelectric performance of SnTe; however, detailed and thorough investigations on exactly how they differ in modulating the band structure and microstructure were seldom given. Through a systematic comparison between Bi-doped and Bi2Te3-alloyed SnTe, we find in this work that despite the fact that they both contribute to the valence band convergence of SnTe, Bi2Te3 alloying induces little effect on the hole concentration unlike the typical n-type feature of Bi-doping; moreover, Bi2Te3 alloying tends to produce dense dislocation arrays at micron-scale grain boundaries which differs significantly from the substitutional point defect character upon Bi-doping. It was then found that Bi2Te3 alloying exhibits a relatively higher quality factor (B ∼ μw/κlat) at higher temperatures than Bi-doping. Subsequent Ge-doping in Bi2Te3-alloyed samples results in further valence band convergence and hole concentration optimization and eventually results in a maximum figure of merit ZT of 1.4 at 873 K in the composition of (Sn0.88Ge0.12Te)0.97-(BiTe1.5)0.03.
研究领域:
材料科学
·
热电材料
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 39
·5574-5584
·
IF 2.6
Manshu Han,Yirong Zhao,Yongfeng Bai,Yu Li,Minghua Chen,Qingguo Chen
Bi-based materials can retain massive amounts of sodium ions through alloying and conversion reactions, resulting in excellent theoretical capacity. However, during the sodiation/desodiation process, there is always a significant volume change in the alloying reaction. In this work, TiO2-coated hexagonal-phase topological insulator (TI) Bi2Te3 composites grown on carbon cloth (CC) were prepared using a solvothermal reaction and an atomic layer deposition process (TiO2/Bi2Te3/CC) as anode materials for sodium-ion batteries without the need for a binder. Compared to the pure Bi2Te3 electrode, the optimized TiO2/Bi2Te3/CC composite exhibits a superior specific capacity of 450 mA h g−1, a high rate performance of 0.1 A g−1, and a high cycling stability of 100 cycles due to the inherent properties of TIs, contributed by the effective TiO2 cladding layer and large interfacial spacing of Bi2Te3. The enhanced reversible capacitance, rate capability, and cycling performances can be attributed to the heterointerfaces and excellent mechanical properties of TiO2, which balance the electronic structure of the building blocks and inhibit the detaching of Bi2Te3 due to large internal stresses. The amorphous TiO2/Bi2Te3/CC composite was treated in a tubular furnace to obtain crystalline TiO2/Bi2Te3/CC, and the electrochemical performance of the heterostructures formed by the TiO2 coating layer with different properties was compared. This work demonstrates the enormous potential for enhancing the sodium-ion storage capabilities of alloy electrode materials by constructing heterostructures.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）