CHEMICAL PAPERS
·
2019
·Vol. 73
·期 8
·1863-1869
·
IF 1.246
Zhuang Huajian,Wang Chan,He Fufeng,Song Qijun
Brass is a metallic alloy that is made of copper and zinc and has a gold-like appearance. Tin coating could endorse the brass with yellowish up to silver-white color and improve its surface durability. In the present work, electroless plating of tin on the brass surface was investigated aiming to obtain a stable and controllable colored surface. In the presence of thiourea, the open circuit potential of brass (− 0.652 V) is more negative than that of tin (− 0.532 V), which makes the deposition of tin on brass feasible. The surface morphology and composition of the coatings were characterized by scanning electron microscope and energy dispersive spectrometer and the results indicated that a large number of tin clusters were formed on the brass surface. The amount of tin clusters determined the color of the coated surface, which can be facilely tuned by the plating time. The UV/Vis diffuse reflectance spectra were used for monitoring the changes of color at different plating time. The results show that there is a good linear correlation ( R 2 = 0.9948) between the absorbance and the plating time, which can be used to control the extent of tin plating on brass. Finally, the cross-cut test showed that the Sn particles were firmly coated on the brass substrate.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2020
·Vol. 10
·期 12
·1154
·
IF 2.436
Xiaozhou Cao,Lulu Xu,Chao Wang,Siyi Li,Dong Wu,Yuanyuan Shi,Fengguo Liu,Xiangxin Xue
The electrochemical behavior and electrodeposition of Sn were investigated in choline chloride (ChCl)–urea deep eutectic solvents (DESs) containing SnCl2by cyclic voltammetry (CV) and chronoamperometry techniques. The electrodeposition of Sn(II) was a quasi-reversible, single-step two-electron-transfer process. The average transfer coefficient and diffusion coefficient of 0.2 M Sn(II) in ChCl–urea at 323 K were 0.29 and 1.35 × 10−9cm2∙s−1. The nucleation overpotential decreased with the increase in temperature and SnCl2concentration. The results of the chronoamperometry indicated that the Sn deposition on tungsten electrode occurred by three-dimensional instantaneous nucleation and diffusion controlled growth using the Scharifker–Hills model. Scanning electron microscopy (SEM) showed that the morphology of the deposits is uniform, as a dense and compact film prepared by potentiostatic electrolysis on Cu substrate. X-ray diffraction (XRD) analysis revealed that the deposits were pure metallic Sn.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hui Li,Jiao Peng,Zhenyu Wu,Xiaolin Liu,Peng Liu,Baobao Chang,Xianyou Wang
SiO x -based anode materials (0 < x < 2) have been regarded as an appealing candidate for anode material of commercial Lithium-ion batteries accounting for their ultrahigh theoretical capacity and low cost. However, its large-scale applications have been hampered by the serious volume expansion during repeated cycles, low intrinsic conductivity and unsatisfactory initial Coulombic efficiencies. Herein, to address these inherent deficiencies, a hierarchical SiO x -based anode with double-layer coatings of Sn inner layer and N-doped carbon outer shell is elaborately designed by a facile two-step hydrolysis process and polymer coating technology . Benefiting from the “synergistic effect” between Sn and SiO x at different working potentials and a well-designed double-layer coating structure, the resultant SiO x /C@Sn@NC anode displays excellent electrochemical properties, including an enhanced initial Coulomb efficiency (73.3%) efficiency, higher reversible capacity (991 mAh g −1 ) and superior long lifespan. Moreover, comprehensive characterization based on the reaction kinetics and structural stability proved that such enhanced ICE and cycling stability of anode material stem from its unique double-layer coating structure and multiple active components, which can significantly improve the diffusion of ion and charge transport, stabilize solid-electrolyte interphase (SEI) layer and absorb the expansion stress of electrode. Therefore, this study provides an efficient and feasible strategy to overcome the limitations of high-capacity SiO x -based anode materials via hybridization design with various active components and a double-layer coating strategy.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
W. Guo,Y. Zhang,X. Tong,X. Wang,L. Zhang,X. Xia,J. Tu
Aqueous zinc-ion battery is a low-cost, non-toxic, and high-safety energy storage system , which has received extensive attention in recent years. However, the Zn anode with high theoretical capacity often suffers from severe corrosion and dendrite growth during the Zn plating/stripping process, leading to severe polarization and eventually short circuits. These knotty problems severely impede further practical applications of Zn-based batteries . Herein, a robust and homogeneous metallic tin (Sn) coating is in situ built on the surface of Zn to form Zn|Sn by a facile chemical vapor deposition method to enhance reaction reversibility. The as-prepared Sn coating not only affords more robust nucleation sites of Zn and higher hydrogen evolution reaction potential, but also effectively decreases the nucleation overpotential of Zn. Accordingly, the symmetric cells with Zn|Sn anode can stably maintain an extremely low-voltage hysteresis (50 mV) in a 500 h of plating/stripping cycles. Even at a high current density of 50 mA cm −2 , the symmetric Zn|Sn cell still can operate well for 50 h. Moreover, this stable Zn|Sn anode also enables a full Zn-ion battery with outstanding rate and cyclic stability.
研究领域:
电化学储能
·
材料科学
·
能源化学
·
金属负极
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 8
·082501
·
IF 4.386
Yinghai Zhao,Xiandong Yin,Pengjie Shen,Ning Li,Yanling Xu
In this work, the tinplate with 0.5 g·m−2 tin coating mass was prepared in order to improve the economic benefit for food packaging field. We studied this low Sn-coated steel surface state and developed a process combined Mo-Mn-Al-P coating based on its special structure. By Taguchi techniques optimization, this chromium-free multi-elements coating has excellent corrosion resistance and adhesion with organic coatings, would be a hopefully replacing traditional chromate passivation treatment on tinplate with low tin coating mass.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Zhao Hengyu,Wang Baoyu,Yang Shiqing,Zhu Huamiao,Zhang Zihao,Li Wenyao,Yang Xiangmin,Fang Bin,Liang Ying,Zhang Zhen
As conductive fillers, the uniformity and compactness of composite metal powders are crucial for preparing high-performance conductive pastes. In this study, a self-circulating electroplating method was proposed, which could efficiently deposit Sn plating on the seed of Cu micro-flakes to prepare composite metal powders. The effects of total electroplating time, single electroplating time, loading mass of Cu seeds on the cathode support, and the bath temperature on Sn plating layer have been systematically investigated and optimized. And the influence mechanisms of electroplating parameters on coating coverage, compactness, and uniformity of Sn plating layer were proposed. The Sn-coated Cu micro-flakes with compact plating layer of 142.9 nm thickness were obtained with the total electroplating time of 60 min, the single electroplating time of 3 min, and the loading mass of Cu seeds of 18 mg/cm 2 at the bath temperature of 15 °C. Finally, the as-prepared Sn-coated Cu micro-flakes were used as fillers to prepare conductive pastes, which exhibited good antioxidation performance at 85℃ and 85%R.H. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
SusMat
·
2024
·
IF 18.7
Huimin Ji,Chunlin Xie,Rui Zhang,Hao Wu,Jiawen Dai,Sihan Li,Qi Zhang,Dan Sun,Yougen Tang,Peiyu Wang,Tian Qiu,Haiyan Wang
Anode-free sodium batteries (AFSBs) have attracted increasing attention for their high energy density. However, they suffer from rapid capacity decline resulting from sodium dendrite growth at the sodium/host interface and irreversible side reactions at the electrolyte/sodium interface. Herein, a GaInSn-coated Cu foil (G-Cu), prepared by a simple brush coating method, was applied as the sodiophilic current collector to regulate sodium nucleation behavior. In addition, a nonexpendable functional electrolyte additive, hexamethyldisiloxane (HMDSO), was introduced, which could be absorbed on the sodium surface and serve as a protective layer against corrosion side reactions at the electrolyte/sodium interface. It is interesting to note that this additive barely participated in forming the solid electrolyte interphase. The synergetic effects of sodiophilic interface design and electrolyte regulation enable reversible sodium plating and stripping. Ultimately, the AFSB assembled using G-Cu and HMDSO electrolyte with a highly loaded Na 3 V 2 (PO 4 ) 3 cathode (≈12.5 mg cm −2 ) delivers a discharge capacity of 84.5 mAh g −1 after 200 cycles with a high capacity retention of 87.6%, significantly extending its operation lifespan.
研究领域:
材料科学
·
电化学
✓ 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）