Advanced Electronic Materials
·
2025
·
IF 5.3
Mingxing Cao,Zhigao Zhang,Jian He,Ruifen Hou,Wenjie Gong,Zhihong Wang
Tungsten telluride (WTe 2 ) and silver telluride (Ag 2 Te) are recently developed magnetoresistive materials, and bulk composites of these materials would be extremely advantageous in improving the magnetoresistance characteristics of the individual components and expanding their applications. In this study, previously developed synthesis methods for WTe 2 and Ag 2 Te are applied to effectively engineer WTe 2 and Ag 2 Te bulk composites. Introducing 10% Ag 2 Te in the WTe 2 matrix improves the magnetoresistance and lowers the critical magnetic field and higher onset temperature relative to those of pure-phase WTe 2 . The relationship between the magnetoresistance performance and Ag 2 Te content is further explored using simulations. The onset temperature and critical magnetic field follow the Kohler rule based on resistance calculations. The excellent composite magnetoresistance of these materials will find applications in the field of electronics.
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
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Jinpeng Hu,Yaru Cui,Yu Hao,Juan Wang,Xihong He,Shufeng Yang
Owing to the high theoretical capacity, multi-electron reactions and semimetallic characteristics, metal tellurides present promising potential for sodium-ion storage. Yet structural collapse and capacity degradation remain inevitable. In this work, a structural confinement strategy was employed to fabricate zinc-telluride/cobalt-telluride heterostructures (ZnTe/CoTe 2 @NC) that is constrained by nitrogen-doped carbon (NC) derived from a metal-organic framework (MOF) and reinforced by carbon nanotubes (CNTs), via template self-assembly followed by in-situ tellurization. The CNTs crosslink with the MOF precursor to yield a dual-restricted architecture that suppresses nanoparticles agglomeration and enhances cycling stability. In-situ and ex-situ techniques elucidate the “alloy-conversion” reaction mechanism and pseudocapacitive sodium storage behavior of the ZnTe/CoTe 2 @NC anodes. While the density functional theory (DFT) calculations reveal the electronic structure modulation underlying their enhanced conductivity. These favorable electrochemical features arise from the synergistic effects of the Zn-Co heterointerface, the highly conductive carbon network, and the abundant defect sites introduced by nitrogen doping, which mitigate sluggish ion transport and structural degradation. As a result, the ZnTe/CoTe 2 @NC anode delivers a high-rate capacity of 82.1 mAh·g −1 at 20.0 A g −1 and retains 106.1 mAh·g −1 at 1.0 A g −1 after 5000 cycles. This study offers a rational confinement strategy and provides insight into designing electrochemically durable telluride heterostructure anodes.
研究领域:
材料科学
·
电化学
·
纳米能源
·
储能技术
·
无机功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Mingyang Liu,Qi Li,Xudong Xiao,Xuena Ma,Xiaoqin Xu,Yihang Yin,Bin Zhang,Minghui Ding,Jinlong Zou,Baojiang Jiang
Interface engineering has been recognized as one of the most promising strategies for tuning the catalytic properties of catalysts. However, building well-defined nanointerfaces for efficient oxygen reduction/evolution reactions (ORR/OER) remains a challenge. Herein, a hollow heterostructure composed of highly-dispersed CoTe 2 inside the mesoporous walls of nitrogen-doped carbon nanoboxes and uniformly-dispersed NiTe 2 outside the mesoporous walls (H-CoTe 2 /NiTe 2 @NCBs) is designed via a ZIF67-involved etching-anchoring-tellurization strategy. Promising half-wave potential of 0.86 V and overpotential of 320 mV at 10 mA cm −2 are obtained by H-CoTe 2 /NiTe 2 @NCBs. The excellent ORR/OER activity of H-CoTe 2 /NiTe 2 @NCBs is ascribed to the synergistic coupling based on nanointerfaces between CoTe 2 and NiTe 2 . Density functional theory calculations confirm that the nanointerface-based electronic coupling between CoTe 2 and NiTe 2 facilitates the charge transfer between two components and generates abundant catalytically active sites at the heterointerface, thereby significantly promoting the ORR/OER activities. This work provides the design principles for transitional bimetallic tellurides as bifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Liming Zhu,Dezhu Sun,Xuyang Li,Wei Liu,Jiaqiang Huang,Caihang Liang,Xiaokai Hu
Bismuth telluride and lead telluride are typical thermoelectric semiconductors that are metallized for electrical contacts before being assembled into devices. In this study, three iron-group metals of nickel cobalt iron, were chemically plated on n-type bismuth telluride as the prospective contact material for adhesion and barrier in soldering connection with copper. Aluminum was used as the sacrificial anode to ensure iron deposition. The sensitization in borohydride solution facilitated the subsequent plating of metals. The plating rates were determined by gravimetric method. The crystalline structure and morphology of films were characterized. Electrochemical polarizations were undertaken to compare the driving force among three plating reactions through the reduction of metallic cations and the oxidation of hypophosphite anions with the mixed potential theory. The heterojunction of bismuth telluride with copper was fabricated by reflow soldering with Sn 95 Sb 5 foil, and the interfacial resistivity was evaluated by multiple resistance measurements across the junction.
研究领域:
材料科学
·
电化学
·
热电学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Fangfang Ren,Hongjun Pan,Cheng Wang,Yukou Du
Graphical Two-dimensional hexagonal bismuth telluride (Bi 2 Te 3 ) nanosheet were successfully synthesized by a facile solvothermal method, and then coupled with Pd by a microwave-assisted ethylene glycol reduction method to obtain the Pd/Bi 2 Te 3 composite, which delivered superior catalytic performance for the electrooxidation of glycerol in alkaline medium. Designing high-performance anodic catalysts to drive glycerol oxidation reaction (GOR) is essential for advancing direct alcohol fuel cells. Coupling Pd with oxophilic materials is an effective strategy to enhance its intrinsic catalytic activity. In this study, we successfully synthesized Pd/Bi 2 Te 3 catalysts with tunable compositions, using Bi 2 Te 3 as a novel promoter, and applied them to the GOR for the first time. Electrocatalytic tests revealed that the activity of the Pd/Bi 2 Te 3 catalysts was closely linked to their compositions. Among these catalysts, the optimized Pd/Bi 2 Te 3 -20 % showed potential to replace the commercial Pd/C catalyst, exhibiting a peak current density 5.2 times higher than that of the benchmark Pd/C catalyst. Furthermore, improved catalytic stability and faster catalytic kinetics were observed for Pd/Bi 2 Te 3 -20 %. The synergistic effect between Pd and Bi 2 Te 3 is responsible for the high performance of the Pd/Bi 2 Te 3 -20 % catalyst.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Lu Wang,Fuqiang Fan,Wei Cao,Huaping Xu
Reactive oxygen species (ROS) play crucial roles in cell signaling and redox homeostasis and are strongly related to metabolic activities. The increase of the ROS concentration in organisms can result in several diseases, such as cardiovascular diseases and cancer. The concentration of ROS in biologically relevant conditions is typically as low as around tens of micromolars to 100 μM H2O2, which makes it necessary to develop ultrasensitive ROS-responsive systems. A general approach is reported here to fabricate an ultrasensitive ROS-responsive system via coassembly between tellurium-containing molecules and phospholipids, combining the ROS-responsiveness of tellurium and the biocompatibility of phospholipids. By using dynamic light scattering, transmission electron microscopy, scanning electron microscopy, and NMR spectra, coassembly behaviors and the responsiveness of the coassemblies have been investigated. These coassemblies can respond to 100 μM H2O2, which is a biologically relevant ROS concentration, and demonstrate reversible redox properties.
研究领域:
生物化学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2020
·Vol. 2
·期 3
·1333-1339
·
IF 0
Ye Zhang,Qi You,Weichun Huang,Lanping Hu,Jianfeng Ju,Yanqi Ge,Han Zhang
It is widely known that the excellent intrinsic electronic and optoelectronic advantages of bismuthene and tellurene make them attractive for applications in transistors and logic and optoelectronic devices. However, their poor optoelectronic performances, such as photocurrent density and photoresponsivity, under ambient conditions severely hinder their practical application. To satisfy the demand of high-performance optoelectronic devices and topological insulators, bismuth telluride nanoplates (Bi2Te3 NPs) with different sizes, successfully synthesized by a solvothermal approach have been, for the first time, employed to fabricate a working electrode for photoelectrochemical (PEC)-type photodetection. It is demonstrated that the as-prepared Bi2Te3 NP-based photodetectors exhibit remarkably improved photocurrent density, enhanced photoresponsivity, and faster response time and recovery time in the UV-Vis region, compared to bismuthene and tellurene-based photodetectors. Additionally, the PEC stability measurements show that Bi2Te3 NPs have a comparable long-term stability for on/off switching behaviour for the bismuthene and tellurene-based photodetectors. Therefore, it is anticipated that the present work can provide fundamental acknowledgement of the optoelectronic performance of a PEC-type Bi2Te3 NP-based photodetector, shedding light on new designs of high-performance topological insulator-based optoelectronic devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 2
·486-494
·
IF 2.047
Wang Xiaochun,Zhou Zhiwei,Lin Xuesong
In this work, we introduced two-dimensional (2D) WSe 2 with the lowest heat conductivity to enhance thermoelectric properties of the non-toxic and cost-effective SnTe. On one hand, the improved power factor can be attributed to the enhancement of Seebeck coefficient due to the decrease of low-energy carriers and minority carriers by the addition of WSe 2 -SnTe p - p -type heterojunction interface barriers. On the other hand, the thermal conductivity also decreased sharply by the heightened phonon scattering from the high-density stacking faults and multiscale hierarchical architectures. Ultimately, benefiting from the dual regulation effect of the introduction of 2D WSe 2 on the electro-acoustic decoupling, an improved figure of merit ( ZT ) of 1.0 is achieved for the composition of SnTe + 6 wt% WSe 2 at 873 K, which is enhanced by 134% in comparison with the pure SnTe sample. Moreover, the meaningful attempt represents an effective and feasible strategy for mixing SnTe with other compounds by the method of ball milling. Graphical Abstract
研究领域:
材料科学
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Zhiwei Zhou,Junyou Yang,Qinghui Jiang,Xuesong Lin,Jiwu Xin,Abdul Basit,Jingdi Hou,Bingyang Sun
In this work, the co-doping in both the anion and cation sites of SnTe has been implemented by addition of BiCl 3 and the effect of co-doping on thermoelectric performance of SnTe-based materials has been studied detailedly. Benefitting from the sharp reduction of carrier concentration and the increase of density of states due to the electron donor contribution of Bi and Cl, the electrical transport properties have been improved greatly; moreover, the hierarchical architectures such as the point defects , dislocations, nano-particles and phase/grain boundaries act as multiscale phonon scattering centers and effectively suppress the transport of phonons in wide frequency range, thus reduced the thermal conductivity dramatically. Due to the synergistic regulation of cation-anion co-doping, a maximum ZT of ~1.27 at 873 K has been obtained in the sample of SnTe doping with 4% BiCl 3 , which enhances by 182% in comparison with the pristine sample.
研究领域:
材料科学
·
热电材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yang Xiang,Kun Xiong,Linjian Yu,Haidong Zhang,Jia Chen,Meirong Xia
It is of great significance to develop low cost, high-efficiency and environment-friendly electrocatalysts for hydrogen evolution reaction (HER) from water splitting. Herein, nickel telluride nanosheets grown on Ni Foam (NF) with three different crystal phases (NiTe, Ni 2.6 Te 2 and Ni 2.86 Te 2 ) are fabricated by one-step hydrothermal tellurization followed annealing process. The non-stoichiometric Ni 2.86 Te 2 /NF exhibits superior electrocatalytic HER performance compared to the NiTe/NF and Ni 2.6 Te 2 /NF, which is comparable to the state-of-the-art 20 wt% Pt/C catalyst at high current density. The Ni 2.86 Te 2 /NF only requires an overpotential of 348 mV to drive the current density of 200 mA cm −2 in a 1.0 M KOH electrolyte. Similarly, The Ni 2.86 Te 2 /NF delivered current densities of 200 mA cm −2 at the overpotential of 279 mV in 0.5 M H 2 SO 4 . Such excellent performance could be ascribed to the fast electron transfer and positive shift of d d-band center from its rich defective effect of crystal phase transition, as well as to the exposure of active sites provided by the two-dimensional nanosheets with large specific surface area. This work provides valuable insights for the rational modulation of the crystal phase on the nickel telluride for catalyzing HER.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2021
·Vol. 7
·期 12
·2000893
·
IF 7.295
Mingxing Cao,Zhihong Wang,Liwen Ma,Liwen Zhang,Man Wang,Yangsi Liu,Jian He,Xiaoli Xi
Tungsten ditelluride (WTe 2 ) is arising as an attractive material in magnetoresistance (MR) properties filed. The magnetoresistance properties of WTe 2 makes it an ideal material for its magnetoresistive heads of computer and magnetic sensor device applications. So far, people have developed various controlled synthesis methods to produce large-quantity uniform flat WTe 2 crystals. Nevertheless, none of the methods are sustainable, some methods use reducing gases, and some use very long heat preservation, and the process is very complicated. Here, a mild and fast self-flux method is described for WTe 2 synthesis that can avoid producing reducing gases. After conducting structural and physical tests, it is found that annealing time is critical for WTe 2 structure formation. Long annealing time improves the crystallinity of WTe 2 and makes its texture more obvious, increasing the conductivity of WTe 2 . Therefore, it will lead to the anomalous nonsaturating positive magnetoresistance with different field dependent behaviors, reaching the ultrastrong magnetoresistive value of 1040% at 5 K and 14 T. The results provide a sustainable approach for uniform WTe 2 crystal synthesis, which will benefit the large-quantity production of WTe 2 magnetoresistive materials.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 15
·5331
·
IF 3.748
Min Sun,Pengyu Zhang,Qingmin Li,Guowu Tang,Ting Zhang,Dongdan Chen,Qi Qian
N-type bismuth telluride (Bi2Te3) based thermoelectric (TE) fibers were fabricated by thermal drawing and Bridgman annealing, and the influence of Bridgman annealing on the TE properties of n-type Bi2Te3-based TE fibers was studied. The Bridgman annealing enhanced the electrical conductivity and Seebeck coefficient because of increasing crystalline orientation and decreasing detrimental elemental enrichment. The TE performance of n-type Bi2Te3-based TE fibers was improved significantly by enhancing the power factor. Hence the power factor increased from 0.14 to 0.93 mW/mK2, and the figure-of-merit value is from 0.11 to 0.43 at ~300 K, respectively.Keywords:n-type Bi2Te3;thermoelectric fibers;thermal drawing;Bridgman annealing
研究领域:
材料科学
·
热电学
✓ 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）