CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ying Wang,Shanze Liu,Fangbiao Wang,Xin Fan,Qi Chen,Youjin Zheng
The high-pressure effect can effectively regulate the bandgap width of thermoelectric materials, thus optimizing the material properties. In this study, the high temperature and high pressure (HPHT) technique was employed to synthesize In-filled, Te/S double-substituted skutterudite-based thermoelectric materials. The effects of synthesis pressures ranging from 2.0 to 3.5 GPa on their phase structure, microstructure, and thermoelectric properties were systematically investigated. XRD and EDS analyses confirm the phase-pure synthesis of In 0.05 Co 4 Sb 11.3 Te 0.6 S 0.1 . The experimental results combined with first-principles calculations indicate that the pressure-induced bandgap widens from 0.245 eV at 2.0 GPa to 0.270 eV at 3.0 GPa, resulting in not only an exponential decay of the conductivity but also a significant increase in the absolute value of the Seebeck coefficient. The analysis based on the Callaway model demonstrates that introducing In, Te, and S elements strengthens grain boundaries, increases point defects, and enhances resonance scattering, thereby effectively reducing lattice thermal conductivity. At 773 K, the 3.0 GPa sample exhibits the lowest thermal conductivity of 1.56 Wm −1 K −1 and a maximum zT value of 1.20, representing a 40.18 % increase over that of the sample synthesized at 2.0 GPa and an 11.02 % increase over that of the Co 4 Sb 11.3 Te 0.6 S 0.1 sample. In addition, the sample synthesized at 3.5 GPa demonstrates excellent mechanical performance, exhibiting a Vickers hardness of 11.12 GPa. New strategies have been provided for the development of materials with both high thermoelectric and mechanical properties.
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
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产品关联
DOI
高影响因子
Crystals
·
2024
·Vol. 14
·期 8
·728
·
IF 2.4
Boyu Wang,Zhiyuan Jiang
Recently, there has been a growing interest in skutterudite (SKD) compounds containing electronegative elements such as Br, Cl, S, Se, and Te, owing to their increased diversity and the versatility of filler atoms. This study focused on the thermoelectric performance of a series of (Ni, Te) co-doped SKDs filled with the electronegative element S, denoted as SxNi0.4Co3.6Sb11.2Te0.8(x= 0, 0.1, 0.2, and 0.3). These compounds were prepared using a combination of a solid-state reaction and spark plasma sintering techniques. The results showed that (Ni, Te) co-doping introduced excess electrons in the SKD lattice, while the incorporation of the element S into the SKD voids optimized carrier concentration. This led to a considerable increase in the absolute Seebeck coefficient to 110.6 μV K−1at ambient temperatures. The presence of S fillers induced phonon resonance scattering and point scattering, which reduced lattice thermal conductivity and ultimately improved the thermoelectric figure of meritzT, which reached 0.93 for S0.3Ni0.4Co3.6Sb11.2Te0.8at 823 K.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Yuchen Li,Shuaihua Wang,Mao Yu,Huan Li,Benben Li,Kang Zhu,Weishu Liu
Gel-based ionic thermoelectric (i-TE) cells provide alternative thermal energy harvesting from the environment, showing obvious advantages in voltage matching for self-powered Internet-of-Things (IoT) sensors. However, the gel-based i-TE cells always suffer a long thermal charging time and poor output power performance. Herein, a multilayer electrode engineering strategy is proposed from the device-design level, aiming to decrease the ions' diffusion distance, increase the electrode surface area, and facilitate the ions' reaction and recovery process. The thermal charging time is shortened from 27 to 8 min as the electrode layers increase from 2 to 8. An ultrahigh instantaneous power density of 15.8 mW m −2 K −2 and 2 h output energy density ( E 2h ) of 403 J m −2 are achieved in an 8-layer electrode i-TE cell. Finally, A flexible and wearable i-TE device with 20 units is demonstrated to generate a remarkable voltage of 3.8 V and output power of 282 µW by harvesting the human body heat. This work provides a feasible and effective route to design the i-TE device, hopefully promoting its practical power generation application.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Xin Fan,Shan Gao,Qi Chen,Dayi Zhou,Lijie Chang,Yao Wang,Yuewen Zhang,Le Deng,Hongan Ma,Xiaopeng Jia
In recent years, skutterudite filled with electronegative elements (S, Se, Cl, Br) has attracted the extensive attention of researchers. By doping electron donors (Pb, Ni, or Te, S, Se) at the Co or Sb sites, the electronegative elements can form thermodynamically stable compounds in the intrinsic pores of the skutterudite, substantially expanding the research scope of skutterudite. In this study, S0.05Co4Sb11.3Te0.6Se0.1 skutterudite was synthesized at high pressure and high temperature, with a pressure range of 2.0–3.5 GPa. The phase composition, micro-morphology, and electrical and thermal transport properties were systematically characterized. The micromorphology analysis shows that the introduction of S element and substituting Te and Se at the Sb sites inhibit the grain growth in a suitable high-pressure environment. Substantial differences are observed in the directions of the lattice stripes in the samples, and rich grain boundaries and many lattice distortions and dislocation defects occur. The carrier concentration can be optimized by filling the voids of the skutterudite with a few S atoms, and the thermoelectric properties can be optimized by scattering phonons through resonance scattering and defect scattering. The samples synthesized at a pressure of 3.0 GPa and a temperature of 900 K have a maximum power factor of 23.85 × 10–4 W m–1 K–2 and a maximum zT value of 1.30 at a test temperature of 773 K.
研究领域:
材料科学
·
热电材料
✓ 已验证
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Xiangcong He,Jinju Zheng,Tao Yang,Deliu Ou,Chris R. Bowen,Songhan Shi,Qiaochu Chen,Hui Fu,Shuangwu Huang,Yumin Ye,Xiaocheng Huang,Wenna Liu,Weiyou Yang
Piezoelectric nanogenerators (PENGs), which operate based on mechanical-to-electrical energy conversion, have been widely explored for exciting applications in modern devices such as wearable electronics , self-powered sensors, and energy harvesters . Herein, we report on high-performance PENGs based on Cs 2 Ag 0.3 Na 0.7 InCl 6 double perovskite (CDP) within a polyvinylidene fluoride (PVDF) matrix, which exhibit enhanced polarity due to rationally designed Zr/Te codoping. As a proof of concept , the resultant PENGs based on Zr/Te codoped CDP@PVDF deliver an excellent piezoelectric output, with a maximum open-circuit voltage and short-circuit current density of 67 V and 18 μA·cm −2 . This level of performance is ∼19 and ∼12 times higher than PVDF-based PENGs with no CDP, and ∼2 and ∼4 times higher than CDP@PVDF-based PENGs without doping or with single Te doping, and ∼1 and ∼2 times higher than CDP@PVDF-based PENGs with single Zr doping, respectively. Moreover, the as-assembled PENGs exhibit impressive potential in wearable energy harvesters, motion sensors, and DC-power devices with robust stability, underscoring their bright future toward practical applications.
研究领域:
材料科学
·
能源技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Penglu Yu,Linan Feng,Wenxin Tang,Chan Liu,Jin-le Lan,Yuan-Hua Lin,Xiaoping Yang
As for the self-supporting composite films, it is significant to develop a structural design that allows for excellent flexibility while reducing the negative effect on thermoelectric (TE) properties. Herein, a robust, flexible TE film was fabricated by in situ chemical transformation and vacuum-assisted filtration without any organic solvents involved. The performance of the films was further optimized by adjusting the Ag/Te ratio and post-treatment methods. Owing to the semi-interpenetrating nanonetwork structure formed by AgxTe nanowires and bacterial cellulose, the obtained TE film displayed a high tensile strength of ∼78.4 MPa and a high power factor of 48.9 μW m–1 K–2 at room temperature. A slight electrical conductivity decrement of the TE film in flexible test (∼2% after 1000 bending cycles) indicates an excellent flexibility. Finally, a TE bracelet was assembled to harvest body heat energy, and a steady current of ∼2.7 μA was generated when worn on the wrist indoors. This work provides a reference for the structural design and practical application of flexible TE films.
研究领域:
材料科学
·
能源工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 27
·2201585
·
IF 15.153
Tingting Wang,Guangxu Xiao,Qianglan Lu,Yue Zhou,Siyu Wang,Xiaoyang Liang,Yilin Song,Min Xu,Yan Zhu,Nan Li
To overcome the autophagy compromised mechanism of protective cellular processes by “eating”/“digesting” damaged organelles or potentially toxic materials with autolysosomes in tumor cells, lysosomal impairment can be utilized as a traditional autophagy dysfunction route for tumor therapy; however, this conventional one-way autophagy dysfunction approach is always limited by the therapeutic efficacy. Herein, an innovative pharmacological strategy that can excessively provoke autophagy via endoplasmic reticulum (ER) stress is implemented along with lysosomal impairment to enhance autophagy dysfunction. In this work, the prepared tellurium double-headed nanobullets (TeDNBs) with controllable morphology are modified with human serum albumin (HSA) which facilitates internalization by tumor cells. On the one hand, ER stress can be stimulated by upregulating the phosphorylation eukaryotic translation initiation factor 2 (P-eIF2α) owing to the production of tellurite (TeO 3 2− ) in the specifical hydrogen peroxide-rich tumor environment; thus, autophagy overstimulation occurs. On the other hand, OME can deacidify and impair lysosomes by downregulating lysosomal-associated membrane protein 1 (LAMP1), therefore blocking autolysosome formation. Both in vitro and in vivo results demonstrate that the synthesized TeDNBs-HSA/OME (TeDNBs-HO) exhibit excellent therapeutic efficacy by autophagy dysfunction through ER stress induction and lysosomal damnification. Thus, TeDNBs-HO is verified to be a promising theranostic nanoagent for effective tumor therapy.
研究领域:
癌症治疗
·
纳米技术
·
药理学
·
细胞生物学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Food Bioscience
·
2022
·
IF 5.318
Jingjing Liu,Yan Chen,Guiming Fu,Yanru Chen,Yin Wan,Mengfei Deng,Wenqin Cai,Mengxiang Li
Wickerhamomyces anomalus makes a special contribution to the esters flavor of Chinese Baijiu . This study set out to investigate whether W. anomalus NCUF304.1 could improve the flavor of ethyl esters of Te-flavor Baijiu Jiupei (TFBJP). The days 10–30 of the Te-flavor Baijiu brewing stage was the key period for microorganisms to produce ethyl ester compounds. Among them, the content of ethyl acetate in the strengthening group of Jiupei with additional W. anomalus NCUF304.1 was significantly higher ( P < 0.05) than in the control group of Jiupei on days 10–20. Also, there was no significant difference in ethyl acetate content between the two samples until day 30 of fermentation. In addition, the contents of ethyl butyrate , ethyl lactate and ethyl hexanoate in TFBJP strengthened with W. anomalus NCUF304.1 were found to increase by 0.54, 3.27 and 0.58 mg/kg, respectively. These findings evidenced the ability of W. anomalus NCUF304.1 in the Te-flavor Baijiu brewing for improving the flavor of ethyl esters.
研究领域:
食品科学
·
微生物学
·
酿酒技术
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 6
·5513-5521
·
IF 1.5
Feng Xiang,Wei-Ping Gan
In this study, a new Ag-Te doped glass frits were used to prepare silver pastes in order to improve the electrical properties of silicon solar cells. A set of silver pastes was formulated to investigate the effect of the doping proportion on the electrical properties of the silicon solar cells. The silver paste with 5wt% dopant increased the photovoltaic conversion efficiency of silicon solar cells by 0.199% compared to the increase achieved using the paste without the dopant. This effect could be attributed to the addition of dopant, which increased the size and number of Ag crystallites on the silicon wafer. The size and number of Ag crystallites were the major factors controlling the contact resistance between the silver electrode and the silicon wafer, and series resistance of solar cells. When the dopant proportion reached 10wt% or 15wt%, the p-n junction broke due to the oversized Ag crystallites embedded in the p-n junction. Thus, the leakage current was observed, and this current degraded the electrical properties of the silicon solar cells. Therefore, the proper proportion of Ag-Te doped glass frits was necessary to obtain the optimal the silicon solar cells.
研究领域:
材料科学
·
光伏技术
·
半导体器件
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2026
·Vol. 38
·期 14
·7286-7297
·
IF 7.1
Wang Shaoqin,Fu Qingqiao,Zhao Fan,Li Yang,Zhang Jiye,Luo Jun
The nominal compounds GeBi 4 X 7 and GeBi 6 X 10 ( X = Se, Te) exhibit pronounced cation disorder, posing challenges
in achieving single-phase materials at their nominal stoichiometries
and thereby complicating functional optimization. In this work, through
controlled cation composition regulation, we successfully synthesize
single-phase compounds derived from nominal GeBi 4 Te 7 and GeBi 6 Te 10 , eliminating the secondary
phases previously reported in these compounds. The actual stoichiometries
of these single phases are determined to be Ge 0.75 Bi 4.25 Te 7 and Ge 0.65 Bi 6.35 Te 10 , respectively. Additionally, two isostructural single-phase
compounds are discovered in the Se-based counterparts, with actual
compositions of Ge 0.72 Bi 4.28 Se 7 and
Ge 0.62 Bi 6.38 Se 10 . Rietveld refinement
analyses reveal that the cation layers adjacent to the van der Waals
gaps are preferentially occupied by Bi, whereas cation disorder predominantly
arises in the central mixed-cation layer within the GeBi 2 X 4 stack. This layer-selective preference,
combined with cation disorder enabled by the nearly identical electronegativities
of Ge and Bi, drives the overall stoichiometry toward the Bi-rich
regime. With respect to thermoelectric properties, the complex-stacking
single-phase materials derived from nominal GeBi 4 X 7 and GeBi 6 X 10 show distinct advantages over the simple-stacking GeBi 2 X 4 counterparts and conventional
Bi 2 X 3 matrices. Experimental
results indicate that the incorporation of additional Bi 2 X 3 stacks markedly enhances phonon scattering
and reduces the lattice thermal conductivity, while exerting minimal
impact on carrier mobility. Of particular significance, the single-phase
material Ge 0.65 Bi 6.35 Te 10 derived
from nominal GeBi 6 Te 10 achieves a remarkably
low lattice thermal conductivity of ∼0.35 W m –1 K –1 and a dimensionless thermoelectric figure
of merit of ∼0.62 at 525 K. Predictions based on the single
parabolic band model indicate a substantial potential for improving
the thermoelectric performance of Ge 0.65 Bi 6.35 Te 10 through the optimization of carrier concentration,
suggesting that this compound represents a promising alternative to
the traditional Bi 2 Te 3 matrix.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 14
·118532
·
IF 6.3
Jingdan Lei,Xiaoyun Yang,Mengxiang Wu,Xiwei Zhang,Di Yuan,Huijuan Geng,Chong Han,Zhaoyang Han,Zhenjie Tang,Chao Wang
Mg 3 (Sb, Bi) 2 is a promising mid- to low- temperature thermoelectric material owing to its earth-abundant composition. However, its performance is limited by low intrinsic carrier concentration and the inherent trade-off among thermoelectric parameters. Herein, large-grain sized Mg 3.01 Sb 1.3 Bi 0.69 Te 0.01 Ho 0.07 are fabricated via melting method at 1423 K using a tantalum-sealing technique. A high peak zT of 1.6 at 700 K is realized, along with a peak power factor of 24 μW cm −1 K −2 and a low κ L of 0.41 W m −1 K −1 . The superior performance originates from synergistic manipulation of electron and phonon transport. Ho doping optimizes carrier concentration up to 7.2 × 10 19 cm −3 due to its small electronegativity difference with Mg, while the large grain ensures high carrier mobility. Simultaneously, atomic-scale alloy disorder suppresses phonon propagation, resulting in a substantial reduction in lattice thermal conductivity. This work highlights the great potential of synergistic transport engineering for high-performance Mg 3 (Sb, Bi) 2 -based thermoelectric materials.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tong-Yu Li,Wen-Hao Geng,Ze-Long Bao,Peng-Fei Qian,Yu-Long Guo,Hong-Zhang Geng
Flexible thermoelectric materials hold great promise for wearable electronics and self-powering. However, p-type thermoelectric materials that combine multifunctionality, high performance and long-term stability are scarce. Here, we developed a flexible p-type TE-Fabric with excellent stress/thermoelectric sensing and electrical heating properties through molecular engineering strategies. It is worth noting that during the preparation of TE-Fabric, we found that dopamine modification could enable the ordered orientation of PEDOT:PSS. The dopamine-modified PEDOT: PSS treated with multi-layer superposition HCl can greatly improve the electrical conductivity of thermoelectric materials (2040.8 S·cm −1 ), while retaining the partial orientation of PEDOT. The TE-Fabric obtained through layer-by-layer self-assembly achieves a double breakthrough in Seebeck coefficient (27.3 μV·K −1 ) and electrical conductivity (2431.2 S·cm −1 ), while exhibiting excellent mechanical flexibility (elongation at break of 71.1 %, breaking strength of 14.8 MPa) and high-performance stability. Taking advantage of TE-Fabric's high conductivity characteristics, we found that TE-Fabric was able to produce a high efficiency thermal response (93.1 % electro-thermal conversion efficiency, 177.1 °C) at low voltage (5 V). At the same time, the flexibility and high-performance stability supported the advantage of TE-Fabric in stress sensing, with a fast response (0.213 to 0.218 s). The thermoelectric device constructed by alternating six sets of flexible p-type TE-Fabric and flexible n-type nickel sheets produces an output voltage of 9 mV at a temperature difference capable of 60 K. Based on this feature, we combine the thermoelectric generator with a mask to make a breath detection sensor device. By outputting different voltage signals, we can monitor the health status of human body in real time during deep breathing, static breathing, rapid wheezing and coughing. This pioneering work opens up new avenues for the development of flexible P-type TE materials with high stability and versatility.
研究领域:
材料科学
·
纳米技术
·
热电材料
·
柔性电子学
·
可穿戴传感器
·
能量转换
·
自供电设备
✓ 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）