DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 8
·2510-2515
·
IF 4.029
Yuqing Yang,Xiaocun Liu,Xin Liang
We report the enhanced thermoelectric properties of p-type BiCuSeO by tin doping on bismuth sites. Powder X-ray diffraction analysis and Hall measurements indicated effective tin doping in all samples. We found that the doping efficiency of Sn is lower than expected, as seen from the measured carrier concentration. First-principles calculations indicate that the Sn lone pair modifies the band structure at the Fermi level, with the consequent effect observed in the electrical transport and Seebeck coefficient measurements. An enhanced thermoelectric power factor of ∼2.5 μW cm−1 K−2 was reached at 773 K. No significant effect of Sn doping on the thermal conductivity was found; a thermoelectric figure of merit value (ZT) of 0.3 at 773 K is achieved for Bi0.9Sn0.1CuSeO, which is more than twice that of the pristine BiCuSeO.
研究领域:
材料科学
·
凝聚态物理
·
无机非金属材料
·
能源材料
·
半导体物理
✓ 已验证
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Jianglin Diao,Jia Yuan,Zhihao Cai,Lun Xia,Zheng Cheng,Xiaoyan Liu,Wenle Ma,Shufang Wang,Yi Huang
High-performance electromagnetic interference (EMI) materials with remarkable thermoelectric conversion/self-powered capabilities seem to be predictably imperative to eliminate electromagnetic wave pollution and reduce local overheating of devices to ensure the reliable operation of electronic instruments and wearable electronic devices. Herein, multifunctional Bi 2 Te 2.7 Se 0.3 /Ti 3 C 2 T x (BTS/MXene) composites are fabricated by mixing BTS and MXene dispersion followed by vacuum-assisted filtration and hot pressing, which exhibit highest EMI shielding efficiency (EMI SE) of 94.33 dB and average EMI SE of 83.4 dB over the whole X band (BTS/MX-30, containing 30 wt% MXene). Meanwhile, the BTS/MXene composites also demonstrate impressive thermoelectric (TE) conversion capabilities, achieving a peak dimensionless figure of merit (ZT) of 1.2 from 313 to 498 K for BTS/MX-1.5 (involving 1.5 wt% MXene). The excellent electromagnetic wave shielding performances originate from the reflection caused by the impedance mismatch, the multiple scattering at the BTS/MXene interface, the polarization at the terminal of MXene and BTS, etc. On the other hand, the excellent thermoelectric performance of BTS/MXene comes from the high conductivity of MXene and the blocking of low-energy carriers and the scattering of phonons at the interface. Hence, multifunctional BTS/MXene composites display broad prospects for simultaneous implementation of EMI shielding and thermoelectric conversion/self-powered applications in miniature and wearable electronic instruments.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Deyu Bao,Qiang Sun,Linsen Huang,Jie Chen,Jun Tang,Dali Zhou,Min Hong,Lei Yang,Zhi-Gang Chen
Tremendous efforts have been focusing on the improvement of p-type (Bi, Sb) 2 Te 3 -based thermoelectric materials for commercial applications. In this study, we achieve versatile interface engineering through a surface decoration of Bi 0.5 Sb 1.5 Te 3 by amorphous Sb 2 S 3 combining with spark plasma sintering, which introduces semi-coherent Sb/Bi 0.5 Sb 1.5 Te 3 interfaces and dopes S into Bi 0.5 Sb 1.5 Te 3 . Semi-coherent Sb/Bi 0.5 Sb 1.5 Te 3 interfaces strongly scatter phonons and lower energy carriers, leading to decreased thermal conductivity and increased Seebeck coefficient, while the electrical conductivity is not sacrificed due to the compromise of the slightly reduced carrier mobility by interfacial scattering and the increased carrier concentration by S doping. Benefited from the decoupled thermoelectric properties, a significantly enhanced power factor of 3345.40 μW m −1 K −2 and a low thermal conductivity of 0.78 W m −1 K −1 is obtained in Bi 0.5 Sb 1.5 Te 3 -0.4%Sb 2 S 3 , leading to a high peak zT of ∼ 1.31 at 330 K, which shows a 54% enhancement compared with pristine Bi 0.5 Sb 1.5 Te 3 . Moreover, a conversion efficiency of ∼ 7.6% can be predicted in a single leg Bi 0.5 Sb 1.5 Te 3 -0.4%Sb 2 S 3 -based module under a cold side temperature of 300 K and hot side temperature of 480 K. This study paves a facile amorphous Sb 2 S 3 induced interface engineering strategy for the development of high performance (Bi,Sb) 2 Te 3 -based thermoelectric materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
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
International Journal of Applied Ceramic Technology
·
2023
·Vol. 21
·期 2
·1220-1230
·
IF 2.1
Yi Qin,Mengxue Wang,Xiaohan Li,Yajuan Zhang,Shenglai Tang,Jianfeng Zhu,Ting Zhao
SnSe-based materials have attracted widespread attention in thermoelectrics due to their outstanding thermoelectric performance. However, the pristine and unmodified polycrystalline SnSe reveals poor electrical properties. Doping and constructing nanostructured composite architectures to produce energy filtering effect proved to be an effective method to strengthen thermoelectric performance. In this study, Ti 3 C 2 /Sn 0.98 Cd 0.02 Se composites are successfully fabricated by the solvothermal method combined with the electrostatic self-assembly method and spark plasma sintering. The phase interface introduced by incorporating Ti 3 C 2 into Sn 0.98 Cd 0.02 Se can effectively filter low-energy carriers due to its generation of energy barriers, thereby the Seebeck coefficient of x wt% Ti 3 C 2 /Sn 0.98 Cd 0.02 Se x = (0.05, 0.5, 1) samples is better than that of the pristine Sn 0.98 Cd 0.02 Se over the whole temperature range. Meanwhile, high conductivity was also obtained in 1 wt% Ti 3 C 2 /Sn 0.98 Cd 0.02 Se sample so that the high power factor of 3.31 μWcm −1 K − 2 was acquired at 773 K. Ultimately, a peak ZT value of 0.41 was obtained at 773 K, compared with pristine Sn 0.98 Cd 0.02 Se, and the thermoelectric performance improved by 24%. This study offers an available approach to efficiently enhance the thermoelectric properties of polycrystalline SnSe-based materials.
研究领域:
材料科学
·
热电学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Shaohai Wu,Hengquan Yang,Zhengsen Wu,Chengyan Liu,Lei Miao,Jie Gao,Xiaoyang Wang,Xiuxia Wang,Chengjin Shen,Jacques G. Noudem,Jun Wang
Eco-friendly and low-cost layered SnSe2-based materials have been attracting great attention in the thermoelectric field for their intrinsically low thermal conductivity. In this work, we applied AgCl as Cl-dopant and formed Ag-rich precipitates in SnSe2 polycrystals, and their thermoelectric properties were investigated. The results demonstrate that Cl was artificially incorporated into SnSe2 by the substitution of Se atoms, playing as donor centers and thus increasing the carrier concentration by 2 orders of magnitude, leading to a tremendous improvement of the electrical conductivity and power factor. However, Ag atoms hardly enter into the Sn lattice sites and brought about the generation of Ag-rich precipitates. The complicated microstructures with multiple types of defects, such as point defects, boundaries, dislocations, and so on, result in a relatively low lattice thermal conductivity in the AgCl-introduced SnSe2 samples. Additionally, the anisotropic electrical and thermal transport properties were investigated, and the results show that higher ZT values were obtained along the pressing direction in these textured samples because of the significantly suppressed lattice thermal conductivity caused by the enhanced phonon scattering via the interior van der Waals layers. Ultimately, a maximum ZT value of 0.35 was realized at 400 °C in the polycrystalline SnSe2 with introduction of 11 mol % AgCl, which is nearly 3 times higher than that value of the pristine counterpart. It demonstrates that the combined effects of Cl-doping, Ag-rich precipitates, and texturing could effectively enhance the ZT value for polycrystalline SnSe2.
研究领域:
材料科学
·
热电学
·
固体物理学
✓ 已验证
产品关联
DOI
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Senlin Leng,Shibo Guan,Yingying Xu,Hongzhang Song,Mengyao Li,Haoshan Hao
Bi 2 Sr 2 Co 2 O y has good thermoelectric performance, but it still has wide room for further improvement. In this study, the (Ba 0.15 Pb 0.15 Ag 0.1 Na 0.2 Cu 0.2 Bi 1.2 )Sr 2 Co 2 O y high-entropy sample was prepared by the Bi 2 Sr 2 Co 2 O y pristine sample and the multi-element doping in Bi cite. On the one hand, the carrier concentration and carrier mobility of the high-entropy sample increase, so its electrical transport performance is improved greatly. On the other hand, due to the high disorder introduced by the multi- element doping, the phonon scattering is enhanced, and the thermal conductivity of the high-entropy sample is suppressed significantly. Finally, at 923 K, the ZT value (the dimensionless thermoelectric figure of merit) of the high-entropy sample reaches 0.26, which is about 1.9 times higher than that of the pristine sample.
研究领域:
材料科学
·
凝聚态物理
·
无机非金属材料
·
能源材料
·
热电转换
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2021
·
IF 9.298
C. Li,S. Ma,W. Cui,X. Sang,P. Wei,W. Zhu,X. Nie,W. Zhao,Q. Zhang
Seeking novel and effective approaches to synergistically improve the electrical and thermal transport properties and electro-thermal conversion efficiency of Bi 2 Te 3 -based alloys is essential for commercial applications. Here, GdCo 2 /Bi 0.37 Sb 1.63 Te 3 thermoelectric nanocomposites were designed and synthesized to achieve synergistic improvement of electrical and thermal properties . As confirmed by magnetoresistance measurement, the built-in magnetic field and magnetic scattering generated by magnetic nanoparticles decrease the carrier concentration and mobility, and increase the Seebeck coefficient . Meanwhile, GdCo 2 nanoparticles lead to broad-frequency phonon scattering, which effectively reduces the lattice thermal conductivity of nanocomposites. Eventually, the average ZT of the nanocomposite is increased by 18% in the range of 300–500 K, and the cooling temperature difference is increased by 68% near room temperature. This work proves that the thermoelectromagnetic coupling effects generated by magnetic particles can effectively improve the electro-thermal conversion performance.
研究领域:
材料科学
·
凝聚态物理
·
热电材料
·
纳米科技
·
功能材料
✓ 已验证
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Zhan Shaoping,Hong Tao,Qin Bingchao,Zhu Yingcai,Feng Xiang,Su Lizhong,Shi Haonan,Liang Hao,Zhang Qianfan,Gao Xiang,Ge Zhen-Hua,Zheng Lei,Wang Dongyang,Zhao Li-Dong
Great progress has been achieved in p-type SnS thermoelectric compound recently, while the stagnation of the n-type counterpart hinders the construction of thermoelectric devices. Herein, n-type sulfide PbSnS 2 with isostructural to SnS is obtained through Pb alloying and achieves a maximum ZT of ~1.2 and an average ZT of ~0.75 within 300–773 K, which originates from enhanced power factor and intrinsically ultralow thermal conductivity. Combining the optimized carrier concentration by Cl doping and enlarged Seebeck coefficient through activating multiple conduction bands evolutions with temperature, favorable power factors are maintained. Besides, the electron doping stabilizes the phase of PbSnS 2 and the complex-crystal-structure induced strong anharmonicity results in ultralow lattice thermal conductivity. Moreover, a maximum power generation efficiency of ~2.7% can be acquired in a single-leg device. Our study develops a n-type sulfide PbSnS 2 with high performance, which is a potential candidate to match the excellent p-type SnS.
研究领域:
材料科学
·
热电学
·
固体物理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 22
·33967-33975
·
IF 5.532
Ya-nan Li,Ping Wu,Shiping Zhang,Yili Pei,Jinguang Yang,Sen Chen,Li Wang
Adding nanoparticles is a method to regulate the performance of thermoelectric materials. Ca 3 Co 4 O 9 /x MoSi 2 (x = 0, 0.05, 0.10, 0.13, and 0.16) was synthesized by a wet chemical method combined with atmospheric pressure sintering. The XRD and SEM results reveal that there are no other reaction in the samples. The grain size of all samples decrease with increasing MoSi 2 content, and all presented a similar flake morphology. The influence of MoSi 2 on the thermoelectric performance of Ca 3 Co 4 O 9 is systematically analysed. The appropriate addition of nano-MoSi 2 particles can increase the carrier concentration and enhance conductivity of Ca 3 Co 4 O 9 . The electrical conductivity of Ca 3 Co 4 O 9 /0.05 MoSi 2 is 83.16 Scm −1 , which is 49.2% higher than that of Ca 3 Co 4 O 9 at 1080 K. The Seebeck coefficient of the Ca 3 Co 4 O 9 /0.16 MoSi 2 sample reaches 197.56 μVK −1 at 980 K, which is significantly better than that of previously reported samples prepared by the same method. Moreover, combined with the experimental results and the analysis of the effective medium theory model, the addition of MoSi 2 can effectively debase the thermal conductivity of Ca 3 Co 4 O 9 . The thermal conductivity of Ca 3 Co 4 O 9 /0.16 MoSi 2 (∼1.26 Wm −1 K −1 , 1080 K) samples decrease greatly, which is attributed to the influence of interfacial thermal resistance and pores in the Ca 3 Co 4 O 9 /MoSi 2 . The ZT value of the Ca 3 Co 4 O 9 /0.05 MoSi 2 sample increases by 44.4% compare with that of Ca 3 Co 4 O 9 and reaches 0.26 at 1080 K. These results demonstrate that adding an appropriate amount of MoSi 2 particles is one of the methods to enhance the thermoelectric performance of Ca 3 Co 4 O 9 ceramic samples.
研究领域:
材料科学
·
凝聚态物理
·
无机非金属材料
·
能源材料
·
热电转换
✓ 已验证
DOI
高影响因子
Small Methods
·
2024
·Vol. 8
·期 10
·2301619
·
IF 10.7
Zhifang Zhou,Jinming Guo,Yunpeng Zheng,Yueyang Yang,Bin Yang,Dengfeng Li,Wenyu Zhang,Bin Wei,Chang Liu,Jin-Le Lan,Ce-Wen Nan,Yuan-Hua Lin
BiCuSeO is a promising oxygen-containing thermoelectric material due to its intrinsically low lattice thermal conductivity and excellent service stability. However, the low electrical conductivity limits its thermoelectric performance. Aliovalent element doping can significantly improve their carrier concentration, but it may also impact carrier mobility and thermal transport properties. Considering the influence of graphene on carrier-phonon decoupling, Bi 0.88 Pb 0.06 Ca 0.06 CuSeO (BPCCSO)-graphene composites are designed. For further practical application, a rapid preparation method is employed, taking less than 1 h, which combines self-propagating high-temperature synthesis with spark plasma sintering. The incorporation of graphene simultaneously optimizes the electrical properties and thermal conductivity, yielding a high ratio of weighted mobility to lattice thermal conductivity (144 at 300 K and 95 at 923 K). Ultimately, BPCCSO-graphene composites achieve exceptional thermoelectric performance with a ZT value of 1.6 at 923 K, bringing a ≈40% improvement over BPCCSO without graphene. This work further promotes the practical application of BiCuSeO-based materials and this facile and effective strategy can also be extended to other thermoelectric systems.
研究领域:
材料科学
·
凝聚态物理
·
能源材料
·
热电转换
·
纳米复合材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qinghui Jiang,Huishan Hu,Junyou Yang,Jiwu Xin,Sihui Li,Giuseppe Viola,Haixue Yan
SnTe has attracted considerable attention as an environmentally friendly thermoelectric material. The thermoelectric figure of merit ZT value is related to low thermal conductivity that can be successfully realized using fabrication of nanostructures. However, the practical realization of SnTe nanostructured composites is often limited by long reaction time, low yield, and aggregation of nanoparticles. Herein, a simple substitution reaction between Cu2Se and SnTe was adopted to realize Cu1.75Te-SnTe nanocomposites with unique all-scale hierarchical structures. On the atomic level, the substitution SeTe is introduced into the lattice via the reaction between Cu2Se and SnTe; on the nanoscopic level, Cu1.75Te nanoinclusions with 10 nm size are evenly distributed at the grain boundaries of SnTe with average grain size less than 1 μm; on the mesoscopic level, these SnTe grains stack up to larger particles (10–20 μm), which are further surrounded by Cu1.75Te grains with a predominant size of 1–2 μm. These hierarchical structures, together with additional SnTe stacking faults, can effectively scatter phonons with different wavelengths to reduce the lattice thermal conductivity. At 873 K, a thermal conductivity value of 0.49 W·m–1·K–1 was obtained in the SnTe nanocomposite sample with 0.057 Cu1.75Te molar content, which is 40% lower than that of the pristine SnTe. By using the same approach for scattering phonons across integrated length scales, a ZT value of 1.02 (∼80% enhancement, compared with that of the pristine SnTe) was achieved at 873 K for the sample of the SnTe nanocomposite with 0.034 Cu1.75Te molar content. This large increase in ZT values highlights the role of multiscale hierarchical architecture in controlling phonon scattering, offering a viable alternative to realize higher performance thermoelectric bulk materials.
研究领域:
材料科学
·
热电学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）