Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Bingqin Wang,Yadi Zhao,Ruichao Yan,Liangan Liu,Xuequn Cheng,Luntao Wang,Zhong Li,Chao Liu,Dawei Zhang,Xiaogang Li
In this study, 45 steel was taken as the research object, and a tin-iron alloy layer was prepared on its surface via a thermal diffusion tinning process. Combined with a series of characterization methods, the microstructure and element distribution of the thermal diffusion layer were systematically analyzed. Additionally, through cyclic immersion tests, electrochemical measurements, and outdoor exposure tests in marine atmosphere, the effects of thermal diffusion temperature and tin content in the diffusion agent on the structure and corrosion resistance of the thermal diffusion layer were systematically investigated. The results show that thermal diffusion tinning can form an alloy layer dominated by FeSn2 on the surface of 45 steel. Moreover, the higher the thermal diffusion temperature and the greater the tin content in the diffusion agent, the larger the thickness (up to 15 μm) and the better the compactness of the alloy layer. The corrosion resistance of the tinned steel is significantly better than that of 45 steel, and it is further improved with the increase of thermal diffusion temperature, tin content, and extension of thermal diffusion time. Among them, the tinned steel prepared under the thermal diffusion process of 80%-280°C-4h exhibits a corrosion current density of 4.027 μA · cm -2 , which is only 1/400 of that of 45 steel (12.095 μA · cm -2 ), and demonstrates the latest corrosion initiation and slowest development rate in marine atmospheric exposure. The key factors contributing to the improved corrosion resistance are the stable structure of FeSn 2 intermetallic compounds in the thermal diffusion layer, the physical barrier effect of the dense alloy layer, and the protective rust layer formed during the corrosion process.
研究领域:
材料科学
·
腐蚀工程
·
表面工程
·
冶金学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Yuejiao Chen,Qiwen Zhao,Yunyun Wang,Wen Liu,Piao Qing,Libao Chen
Rechargeable aqueous zinc-ion batteries (ZIBs) are attractive candidates for next-generation batteries because of low cost and high safety merits. However, ZIBs still suffer from the problems of dendrites growth during the electrostripping/electroplating process, leading to low cycling stability and hindering the application of ZIBs. Here, a facile and effective strategy of decorating zinc surface with copper alloy layer is developed. The copper alloy layer can act as a nucleating agent and mitigate Zn dendritic growth by guiding uniform Zn deposition. Symmetrical cells assembled with Cu x Zn y coated Zn (denoted as Zn@Cu x Zn y ) electrode can achieve stable cycling for 500 h with a low voltage hysteresis (23 mV) at 1 mA/cm 2 , compared to bare Zn cell with less than 100 h. The superiority of the prepared anode can also be confirmed by the repeated plating/stripping tests at current density of 0.25, 0.5 and 2 mA/cm 2 , respectively. More impressively, when paired with a CNT/MnO 2 cathode, the full cell with Zn@Cu x Zn y anode can maintains a more than twice the discharge capacity after 1000 cycles than that of the full cell with bare Zn anode (144 vs 57 mAh/g at 1 A/g). This strategy is scalable, versatile and cost-effective for fabricating a broad range of zinc metal anodes.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2025
·
IF 5
Zhuo-Yu Jin,Chu Cao,Nuerguli Kari,Dian-Yun Zhang,Qi Wang
Surface plasmon resonance (SPR) sensors are currently applied in various fields, driving the development of precise detection technologies. However, few designs effectively balance ease of fabrication, high detection performance, and structural stability. To address this challenge, we developed an SPR sensor with a sapphire prism-Au/Gallium Nitride (GaN)/Au composite film structure. The GaN thin film enhances sensitivity, while the coupling between the dual Au layers and sapphire reduces the full width at half maximum (FWHM) and improves sensor stability. Simulation results indicate a significant increase in the electric field intensity at the sensor surface. Experimental results demonstrate that the structure exhibits excellent long-term stability. Compared with conventional Au film sapphire prism SPR sensors, this design achieves a 3.14-fold increase in sensitivity and a 5.43-fold improvement in the figure of merit (FOM). This study presents a novel approach to further enhancing SPR sensor performance and highlights the potential applications of this structure in detection technologies.
研究领域:
光学传感
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Na Wang,Gaoyi Han,Hua Song,Yaoming Xiao,Yanping Li,Ying Zhang,Hongfei Wang
Thin layers of continuous gold have been deposited on the both sides of porous polypropylene films (PPF) via electroless plating method to form a sandwich structure with two conductive surfaces and an intermediate insulating layer (Au/PPF/Au). Then poly (3, 4-ethylenedioxy thiophene) (PEDOT) layers are electrodeposited on the two conductive sides via cyclic voltammetry method to form the sandwich-structured PEDOT-Au/PPF/Au-PEDOT. Gel electrolyte of H 3 PO 4 /polyvinyl alcohol (H 3 PO 4 /PVA) is then added to the sandwich-structured PEDOT-Au/PPF/Au-PEDOT to form the integrated flexible supercapacitor of Au-PEDOT|H 3 PO 4 /PVA|PEDOT-Au. The PEDOT-Au/PPF/Au-PEDOT sandwiched structures are characterized and the capacitive performances of the integrated flexible cells are investigated in detail. The results show that the optimum integrated flexible cell exhibits excellent cycling stability (91.8% capacitance retention after 20000 cycles) and relatively high areal specific capacitance. Furthermore, the cells of Au-PEDOT|H 3 PO 4 /PVA|PEDOT-Au not only exhibit excellent bending endurance (99.1% capacitance retention after 5000 repeated bending cycles), but also can be conveniently connected in series without additional wires. This integrated flexible cell may exhibit potential application in portable electronics.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Ya-Nan Liu,Luo-Jia Feng,Shao-Wei Bian
Textile supercapacitors are promising flexible energy-storage devices, and they have great potential in various wearable electronics. However, they suffer from low electrochemical performance. Developing a rational fiber surface structure to enhance the electron transportation, electrolyte ion diffusion, and electroactive surface area is the most promising strategy to address the above issue. A textile-based electrode is developed by in situ coating the primary fiber inside the cotton fabric with an Au metallic layer and a nanostructured conductive metal–organic framework layer. The hierarchically porous structure, 3D conductive skeleton constructed by metal plated fabrics and conductive active materials, high surface area, and rational interface structure provide the electrodes with excellent synergistic effects, leading to high specific capacitance (258 F g–1), long cycling life, outstanding structural stability, and flexibility. A symmetrical all-solid-state textile supercapacitor employing this electrode achieves a high energy density of 434 μwh cm–2.
研究领域:
材料科学
·
能源存储技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Smart Materials and Structures
·
2024
·Vol. 33
·期 6
·065035
·
IF 3.7
Faming Lin,Haidong Xu,Tao Wang,Yalian Wen,Yifan Liu
Ionic polymer-metal composite (IPMC) actuators have attracted considerable scientific interest in the field of robotics and artificial muscles due to their low operating voltage, high strain capacity, and lightweight. However, the non-uniform bending of IPMC actuators affects their control accuracy and limits their potential applications. In this work, the surface voltage of IPMC actuators was measured and the internal electric field distribution was numerically computed. It was concluded that the non-uniform bending is mainly due to the non-uniform distribution of hydrated cations inside the IPMC as a result of the inhomogeneous electric field. The bending uniformity is improved by sputtering a gold layer on the surface of the IPMC actuator, and a support strip is introduced to limit the bending of the IPMC in the width direction, resulting in an improvement of its pointing characteristics. It is found that the bending uniformity of IPMC improved by 35.27% and 119.48% by sputtering at an input voltage of 2.5 V and 5 V respectively. When the input voltage is fixed at 2.5 V and 5 V, the bending in the width direction is reduced by 75.68% and 93.12% with the support structure, respectively.
研究领域:
机器人技术
·
人工肌肉
·
材料科学
·
电活性聚合物
✓ 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）