ENERGY
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2017
·
IF 4.52
Haijun Song,Kefeng Cai
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) functionalized Te (PF-Te) nanorods were in situ synthesized. A simple and efficient vacuum-assisted filtration method was employed to integrate the PF-Te nanorods with PEDOT:PSS to form PEDOT:PSS/PF-Te composite films. By varying the content of PF-Te nanorods, the Seebeck coefficient of the composites increases from 15.6 to 51.6 μV/K, while the electrical conductivity decreases from 1262 to 122.4 S/cm. A maximum power factor of 51.4 μW/mK 2 is obtained from a sample containing 70 wt% PF-Te nanorods at room temperature. An 8 single-leg flexible thermoelectric generator prototype was fabricated using the as-prepared PEDOT:PSS/PF-Te composite film containing 70 wt% PF-Te on a polyimide substrate with Ag electrodes. The prototype produced an output voltage of 2.5 mV at a 13.4 K temperature difference between human body and the environment.
研究领域:
材料科学
·
能源技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Xinxing Zhou,Yujie Lin,Bo Wu,Hujing Shu,Kerui Li,Qinghong Zhang,Yaogang Li,Chengyi Hou,Hongzhi Wang
The decoupling of thermoelectric performance parameters to coordinately optimize power factor (PF) and figure of merit (ZT) remains a critical challenge. Aerogels are valued for their low thermal conductivity and light weight; however, the lower electrical properties also lead to poor ZT values that affect their practical use. Herein, we implement a directional assembly strategy integrating Te nanowires (Te NWs) with single-walled carbon nanotubes (SWCNTs) to construct a three-dimensional interwoven network. Mechanistic analysis reveals that enhanced carrier mobility and optimized phonon scattering constitute two pivotal factors. The aerogel achieves PF and ZT of 179.61 μW m −1 K −2 and 0.27, respectively, while maintaining its low thermal conductivity. These parameters rank among the highest reported values for thermoelectric aerogels, accompanied by well-preserved compressibility of 30 %. A wrist-worn flexible device with 12 aerogel units generates 30.84 mV open-circuit voltage and 2.79 μW power output under 45 K temperature difference, demonstrating application potential.
研究领域:
材料科学
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纳米技术
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热电材料
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能量转换
·
柔性电子学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2026
·
IF 19
Yifan Yuan,Kunpeng Zhao,Qingyong Ren,Haotian Gao,Yuxiang Zhan,Tian-Ran Wei,Ting Zhang,Xun Shi
Flexible thermoelectric materials offer a promising route toward self-powered wearable electronics. The emergence of ductile inorganic semiconductors opens a new paradigm for flexible TE technologies, yet their thermoelectric performance remains far from optimal. Herein, we reveal a pronounced phase-transition hysteresis in the Ag 2 (S, Se, Te) system, where the transition temperature during cooling is 20–40 K lower than that during heating. Leveraging this hysteresis behavior, we successfully stabilize different structural phases at ambient conditions simply by varying the thermal treatment protocol. Compared to the monoclinic phase obtained by slow cooling from high temperature, the orthorhombic phase obtained by liquid-nitrogen treatment exhibits worse plastic deformation but much better electrical transport. A maximum power factor of ∼16 µW cm −1 K −2 and a zT of ∼0.5 near room temperature are achieved in the orthorhombic phase, both of which surpass most reported Ag-based ductile thermoelectric materials. This work provides a new pathway for designing high-performance ductile thermoelectrics.
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Small Methods
·
2019
·Vol. 3
·期 12
·1900349
·
IF 0
Ye Zhang,Feng Zhang,Yiguo Xu,Weichun Huang,Leiming Wu,Zhijun Dong,Yupeng Zhang,Biqing Dong,Xiuwen Zhang,Han Zhang
Heterojunctions, composed of different materials, are widely explored in optoelectronic devices thanks to their unique advantages, such as high carrier mobility and excellent photoelectronic characteristics. In this work, Bi 2 Se 3 /Te@Se heterojunctions (Bi 2 Se 3 /Te@Se) are synthesized through the epitaxial growth of Bi 2 Se 3 nanosheets (Bi 2 Se 3 NTs) on tellurium@selenium nanotubes (Te@Se NTs) by using a low-cost and facile solvothermal process. Bi 2 Se 3 /Te@Se are further applied in high-performance photoelectrochemical (PEC)-type photodetection due to the advantages of broadband optical response and fast carrier relaxation time. The PEC results demonstrate that the as-prepared photodetectors have pronounced photoresponse behavior from the ultraviolet to visible band with self-driven ability and excellent long-term stability. It is anticipated that this work provides a new strategy for epitaxial growth of topological insulators on semiconductors for designing new heterojunctions toward high-performance optoelectronic devices.
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DOI
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Chang-Yuan He,Kun Hu,Jing-Yang Zhou,Long Wu,Jian-Han Zhang
Two new Mo-Te-O compounds, (NH₄)₂MgMo₄Te₂O₁₈ and β-MoTe₂O₇, have been synthesized and structurally characterized as frameworks constructed from distorted MoO₆ octahedra and TeO₃ trigonal pyramids with stereochemically active lone pairs.The two phases feature distinct Mo-O-Te connectivities and dimensionalities, leading to different degrees of optical anisotropy. Polarized optical microscopy measurements reveal that both compounds exhibit moderate birefringence, which is further rationalized by density functional theory calculations.The incorporation of Mg²⁺ in (NH₄)₂MgMo₄Te₂O₁₈ results in a more structurally elaborate framework, and this compound shows a black crystal surface with a white interior, indicative of surface-related electronic effects. Combined experimental and theoretical results highlight the role of cooperative MoO₆-TeO₃distortions and framework connectivity in governing optical anisotropy in Mo-Te-O oxides.
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PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Xinyang Zhang,Xiaoyu Yang,Yingjun Wei,Dewei Wang,Yuhong Chen
Aqueous zinc–manganese dioxide (Zn–MnO2) batteries hold great promises for large-scale energy storage but face several challenges, such as dendrite formation on the anode and structural instability of the cathode. Herein, we propose an aqueous tellurium–manganese dioxide (Te–MnO2) battery, which employs carbon-supported tellurium (C@Te) to replace the Zn metal anode coupled with vanadium-doped MnO2 (Mn1−xVxO2) cathode, as an alternative to overcome the intrinsic limitations of conventional Zn–MnO2 batteries. Notably, Mn1−xVxO2 can be produced through a room-temperature redox method, enabling effective V5+ ion doping in various α-, β-, γ-, and δ-MnO2 polymorphs. The resulting Mn1−xVxO2 exhibits enhanced structural stability due to the suppressed Jahn–Teller distortion and improved electronic conductivity resulting from V 3d/O 2p orbital hybridization. Consequently, the Mn1−xVxO2 cathode delivers a high specific capacity of 323.7 mAh g−1 at 0.1 A g−1 and 93.5% capacity retention after 1000 cycles at 0.5 A g−1, which significantly surpass those of the pristine MnO2 (P-MnO2). Mechanistic investigations and theoretical calculations further unveil a synergistic mechanism involving enhanced electron transport, optimized ion adsorption, and improved structural stability, demonstrating that V5+ doping promotes reversible H+/Zn2+ co-intercalation. Our study shows that Te–MnO2 batteries can offer a viable alternative to conventional Zn–MnO2 batteries and afford a universal synthesis strategy for Mn1−xVxO2.
研究领域:
储能
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材料科学
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电化学
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电池技术
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 56
·33965-33971
·
IF 3.119
Haihui Liu,Pengfei Liu,Mengqi Zhang,Zihan Tian,Ning Wang,Yanxin Liu,Xingxiang Zhang
Light-weight, mechanically flexible, transparent thermoelectric devices are promising as portable, and easy-to-integrate energy sources. Poly(3,4-ethylenedioxythiophene) nanowires (PEDOT NWs) possessing high electrical conductivity were synthesized by a facile self-assembled micellar soft-template method. And then, Te nanowires (Te NWs) with high Seebeck coefficient were easily synthesized by the solution process and then added as an inorganic filler to form the PEDOT NW/Te NW nanocomposite films via a simple and convenient vacuum filtration method. The thermoelectric (TE) properties of the nanocomposites were characterized in this research. A maximum power factor of 58.03 μW m−1 K−2 is obtained from the film containing 90 wt% Te NWs at room temperature, which is dozens of times that of the pure PEDOT NW film. This work uses the as-prepared PEDOT NWs/Te NW (90 wt%) nanocomposite film to fabricate a flexible thermoelectric generator and an output voltage of 2.8 mV was generated at a temperature difference of 13.5 K between the environment and human body.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Hengji He,Dainan Zhang,Youbin Zheng,Shuyang Ma,Cheng Liu,Qinghui Yang,Huaiwu Zhang
Li/Te co-doped CaWO 4 ceramics with Li:Te molar ratios of 1:0.5, 1:0.75 and 1:1 was prepared to examine composition- and processing-dependent structural evolution and microwave dielectric properties. The Li:Te = 1:1 series was optimized at 890 °C, whereas the Li:Te = 1:0.5 and 1:0.75 series were optimized at 910 °C. XRD and Rietveld refinement, Raman spectroscopy, EPR, XPS, GCIB depth-profile XPS, ICP-OES and electron microscopy were used to correlate phase assemblage, local bonding, chemical-state signals, retained Li, microstructure and dielectric response. Under the respective optimized conditions, the Li:Te = 1:0.75, x = 0.04 ceramic exhibited the highest Q× f value of 89,613 GHz, while the Li:Te = 1:1, x = 0.04 ceramic showed the least negative τf value of −32.06 ppm/°C. GCIB depth-profile XPS revealed composition-dependent depth evolution of the relative Te 4 + - and Te 6+ -related signals, and ICP-OES confirmed systematic differences in total retained Li. In the Li:Te = 1:1 series, electron microscopy identified a Te/O-enriched amorphous interfacial region. Together, these results show that the Li:Te ratio and sintering condition jointly influence local structure, densification behaviour and microwave dielectric properties. The work provides a basis for optimizing the balance between low dielectric loss and temperature stability in CaWO 4 -based ceramics. Furthermore, a preliminary Ag co-firing test further indicates chemical compatibility under the tested condition.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Taihua Zhang,Xiaofeng Li,Yunfei Lu,Wei Guo,Yan An,Xueting Chang
Polyaniline (PANI) is a promising organic thermoelectric material, but its application is limited by the intrinsic trade-off between electrical conductivity ( σ ) and Seebeck coefficient ( S ). Here, we report a multi-interface engineering strategy to enhance the thermoelectric performance of PANI/Bi₂Te₃ composites. HCl-doped PANI (HPANI) and Bi₂Te₃ are mechanically mixed, and a small amount of emeraldine base PANI (PANI-eb) is introduced to construct additional organic–inorganic interfaces. XPS and UV-vis spectroscopy reveal that these interfaces induce partial de-doping of HPANI, progressively widening the optical bandgap from 1.49 eV to 2.96 eV and reducing carrier concentration. Simultaneously, the increased interfacial density creates energy barriers that filter low-energy carriers, enhancing the average carrier mobility. Hall measurements confirm a mobility increase from 39.9 to 118.6 cm²·V⁻¹·s⁻¹ at 10 wt.% PANI-eb, while carrier concentration decreases monotonically. Temperature-dependent transport further supports the energy-filtering mechanism. Optimized hot pressing at 75 °C improves interfacial contact and polymer chain ordering, leading to simultaneous enhancement of σ and S . The resulting composite achieves a room-temperature S of 149.1 μV·K⁻¹, σ of 17.35 S·cm⁻¹, and a power factor of 38.59 μW·m⁻¹·K⁻¹, which is comparable to the best literature values for bulk PANI-based composites. This work demonstrates that rational interfacial design with PANI-eb, combined with moderate thermal treatment, provides an effective strategy to balance σ and S in polymer-based thermoelectric materials.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 3
·e70630
·
IF 4.2
Hengji He,Dainan Zhang,Youbin Zheng,Shuyang Ma,Kui Liu,Cheng Liu,Qinghui Yang,Huaiwu Zhang
In this study, Li x Ca 1−x W 1−0.75x Te 0.75x O 4 ceramics were synthesised using a non-stoichiometric co-doping strategy (Li/Te = 1:0.75), systematically revealing the synergistic effect of Li and Te. During doping, Li was introduced from the decomposed secondary Li 2 TeO 4 phase, which acted as a liquid-phase sintering aid. Density functional theory calculations confirmed that Te 4+ substitution for W 6+ enhanced the chemical bond strength and effectively passivated oxygen vacancies, promoting densification and improving dielectric properties. However, excessive doping led to the substantial decomposition/volatilisation of the secondary phase, where the volatilisation of Te outweighed its positive substitution effect, thereby degrading both structure and dielectric performance. Following optimisation, the Li 0.04 Ca 0.96 W 0.97 Te 0.03 O 4 ceramic sintered at 910°C exhibited optimal properties: εr = 9.86, Q× f = 89,613, τ f = −38.6 ppm/°C. The material also exhibited favorable dielectric characteristics in the terahertz range (0.2–1.2 THz, ε r : 4.97–6.36, tan δ: 0.009–0.0848), rendering it a potential candidate for dual-band applications in low-temperature co-fired ceramic technology.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
IF 16.8
Jie Xu,Xiaoqian Li,Xingyu He,Yudong Wang,Xiaoke Li,Jianan Jiang,Zhaoyun Liu,Min Hong,Hualing He,Zhicai Yu,Siqi Huo
A core-sheath thermoelectric-thermochromic early fire warning fiber was constructed. • The fiber showed excellent thermoelectric performance and sensitive fire detection. • The fiber demonstrated an exceptional temperature detection accuracy of up to 97.25%. Reliable and flexible early fire warning sensors play a crucial role in fire detection, yet remain a major challenge. Herein, we combined poly (p-phenylene benzobisoxazole) (PBO) nanofibers with thermoelectric and thermochromic (PTT) nano-functional particles to construct a dual-mode early fire warning sensing fiber, which realizes accurate temperature detection through visual and digital signal cooperative sensing. The resulting core-sheath structured nanoscale PTT sensing fiber features PBO nanofibers as sheath, with perovskite crystals assembled on the outermost layer, while the core is composed of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS)@tellurium nanowires (Te NWs)/polyurethane composite thermoelectric nanomaterial. Incorporating PEDOT:PSS@Te NWs into the core facilitates a millisecond-level response to fire (threshold voltage: 1.0 mV, response time: ≤ 0.9 s) and wide temperature range (50–300 °C) fire warning performance. This rapid response is attributed to the optimization of the Te NWs nanointerface heterojunction structure, as well as the formation of a nanowire permeable conductive network, which synergistically enhances the Seebeck coefficient and conductivity ( S = 46.5 μV K − 1 , σ = 2.05 × 10 4 S m − 1 ). Moreover, the sensing fiber has achieved an independent power-free visual warning capability by utilizing colorimetric monitors and the thermochromic properties of perovskite crystals over a wide temperature range of 100–300 °C. This work offers a novel approach to develop a reliable real-time monitoring strategy with an impressive temperature sensing accuracy of up to 97.25% to early fire warning detection in precombustion. Download: Download high-res image (252KB) Download: Download full-size image
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Yanqi Ge,Fumei Yang,Yimiao Chen,Meng Wang,Weicheng Chen,Ye Zhang
van der Waals heterojunctions (vdWHs) have emerged as a promising strategy to improve the optoelectronic properties of materials for use in optoelectronic devices. In this study, independent tellurium nanotube (Te NT) structures with diameters of approximately 80 ± 10 nm were first synthesized. Subsequently, zero-dimensional (0D) bismuth quantum dots (Bi QDs) were uniformly deposited on the surface of one-dimensional (1D) Te NTs via a hydrothermal bottom-up assembly process, successfully constructing a mixed-dimensional Bi/Te van der Waals heterojunction (vdWH) with Bi QDs densely distributed around the Te NTs. The nonlinear optical properties of the heterojunction were systematically investigated. Due to the built-in electric field at the tellurium/bismuth interface, these vdWHs show significantly enhanced nonlinear absorption, lower saturation intensity, and improved carrier transport. These properties make Bi/Te vdWHs promising candidates for advanced optical applications. Furthermore, stable ultrashort pulses and bound-state solitons at a 1.5 μm wavelength were generated by incorporating Bi/Te vdWHs as saturable absorbers within an erbium-doped fiber laser cavity. Such findings highlight the potential of Bi/Te vdWHs as a versatile platform for developing high-performance optical devices with enhanced optoelectronic and nonlinear optical properties.
研究领域:
材料科学
·
光学工程
·
纳米技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）