PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Jinhe Dou,Jing Wang,Yupeng Lu,Chuanzhong Chen,Huijun Yu,Robin Lok-Wang Ma
MAO/CS composite coatings were generated on Mg-1.75Zn-0.56Ca alloy surface for protection and improving biocompatibility of Mg -Zn- Ca alloy in the physiological environment. The microstructure, surface analysis and corrosion resistance of samples were evaluated by scanning electronic microcopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in SBF solution. In addition, in vitro cell cytotoxicity test was performed by MTT tests. The findings of this work indicated that MAO/CS composite coatings were smooth and defect-free. The MAO/CS coatings retained a low degradation rate and the solution pH value at a moderate level (≤7.5) during immersion test. The corrosion resistance and cell proliferation were greatly enhanced by the composite coating. Furthermore, the different cell cytotoxicity on Mg alloy, MAO and MAO/CS coating was discussed.
研究领域:
生物材料
·
医学工程
·
腐蚀科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 7
·8710-8715
·
IF 3.057
Yang Chen,Chengji Deng,Chao Yu,Jun Ding,Hongxi Zhu
ZrN nanopowders were obtained by using ZrO 2 and Mg as the main raw materials in a molten salt environment and a high-purity nitrogen atmosphere. The effects of ZrO 2 / Mg mole ratio, nitriding temperature , and holding time on the synthesis of ZrN were investigated. ZrN was formed at 700 °C for 3 h. When the nitriding temperature increased to 1000 °C, pure phase ZrN was formed. The specific surface area of ZrN was 20.92 m 2 /g. When the temperature rose to 1100 °C, the resulting ZrN particles were finer; the average size of ZrN decreased from 71.60 to 49.65 nm. Further, an excessively long holding time led to evaporation of the molten salt, ZrO 2 , which was not fully nitrided. Finally, a possible formation mechanism of ZrN is proposed.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
高温合成
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2016
·
IF 5.154
C.D. Gu,W. Yan,J.L. Zhang,J.P. Tu
A novel ionothermal strategy for developing a chemical conversion film on magnesium alloys is proposed based on the interaction of a deep eutectic solvent (DES) with the substrate. Upon heating the choline chloride/urea mixture-based DES can react with the AZ31B magnesium alloy surface to form a promising anti-corrosion conversion film. Interestingly, the chemical conversion film is mainly composed by MgH 2 and MgCO 3 phases. The as-grown conversion film exhibits superhydrophobicity after surface modification in a stearic acid/ethanol solution. Electrochemical tests and visual investigations indicate the corrosion resistance of the magnesium alloy can be improved by the conversion film.
研究领域:
材料科学
·
金属腐蚀与防护
·
表面工程
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ximin Ling,Wutao Wei,Changwei Shan,Xuyan Qin,Mingjie Song,Zhao Liu,Liwei Mi
Mg 2+ /Li + hybrid batteries (MLHBs), which support the rapid insertion and removal of Mg 2+ /Li + bimetallic ions, are promising energy storage systems. Inspired by the Kirkendall effect, ball-in-ball bimetallic sulfides with heterostructures were prepared as cathode materials for the MLHBs. First, a nickel–cobalt precursor (NiCo-X precursor) with three-dimensional (3D) nanosheets on its surface was prepared using a solvothermal method based on the association reaction between alkoxide molecules. Subsequently, the NiCo-X precursor was vulcanized at high temperature using the potential energy difference as the driving force to successfully prepare NiS 2 @CoS 2 core–shell hollow spheres. When used as the positive electrode material for the MLHBs, the NiS 2 @CoS 2 hollow spheres exhibited excellent Mg 2+ /Li + ion storage capacity, high specific capacity, good rate performance, and stable cyclic stability owing to their tough hierarchical structure. At a current density of 500 mA g −1 , a specific capacity of 536 mAh g −1 was maintained after 200 cycles. By explaining the transformation mechanism of Mg 2+ /Li + in bimetallic sulfides, it was proven that Mg 2+ and Li + worked cooperatively. This study provides a new approach for developing MLHBs with good electrochemical properties.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 34
·16043-16051
·
IF 6.97
Yujie Zhang,Dong Chen,Xue Li,Jingwei Shen,Zhongxue Chen,Shun-an Cao,Ting Li,Fei Xu
Rechargeable Mg batteries are promising candidates for highly safe large-scale energy storage batteries owing to their low-cost and non-dendritic metallic Mg anode. However, exploration of high-performance cathodes remains a great challenge hindering their development. Herein, a new pseudocapacitive Mg-storage nanowire material (a-MoS3@CNT) is constructed with a carbon nanotube (CNT) core and an amorphous MoS3 (a-MoS3) outer layer (15 nm thick). The nanowire cathode exhibits a high reversible capacity of 175 mA h g−1 at 100 mA g−1, a good rate performance of 50 mA h g−1 at 1000 mA g−1, and an outstanding long-term cyclability over 500 cycles. Further investigation of the mechanism demonstrates that the Mg-storage of a-MoS3@CNT is mainly achieved by the pseudocapacitance of a-MoS3, in which Mg2+ ions show fast solid-state diffusion kinetics. The present results demonstrate a new approach for efficient Mg-storage using pseudocapacitive materials, and the performance and solid-state Mg2+ diffusion kinetics could be optimized by delicate morphology tailoring.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Xingyu Gao,Xiquan Qi,Xiangyu Zhao
Organic magnesium storage materials are intriguing as cathode materials for rechargeable magnesium batteries (RMBs) because of their flexible structure and the potential of fast Mg-ion diffusion kinetics. However, the dissolution of these materials in the electrolytes of the RMBs limits their application. Herein, the pentacenetetrone (PT) and its polymer poly(pentacenetetrone sulfide) (PPTS) are developed as cathode materials for RMBs. Given the benefit of its insoluble property in the Mg-ion electrolyte, the as-prepared PPTS cathode exhibits significantly enhanced reversible capacity, coulombic efficiency, and rate performance compared to PT. For instance, the high capacities of 241 mAh g–1 (100 mA g–1) and 131 mAh g–1 (2 A g–1) are obtained for the PPTS cathode, demonstrating a competitive rate performance of PPTS compared to previously reported organic cathodes of RMBs. In contrast, the soluble PT cathode exhibits much lower capacities of 163 mAh g–1 (100 mAh g–1) and 31 mAh g–1 (2 A g–1).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Corrosion Communications
·
2023
·
IF 0
Zhifeng Huang,Qiwen Yong,Zhi-Hui Xie
In this work, a novel stearic acid modified nickel-based (NiSA) superhydrophobic composite coating with good anti-corrosion properties was prepared on magnesium alloy AZ31 surface through electroless nickel-phosphorus plating, electrodeposition of porous nickel, and decoration with stearic acid. Surface topography, chemical groups, and structural compositions of the NiSA coating were characterized through scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD), respectively. Adhesion of the NiSA coating was evaluated by a tape test method, and corresponding water contact angle (WCA) and water sliding angle (WSA) were tested by a contact angle meter. Results indicate that WCA value of the NiSA coating was 154.6° ± 3.7°, and WSA value was 5.9° ± 1.7°, indicating a high superhydrophobicity. Electrochemical impedance spectroscopy (EIS) and Tafel fitting reveal that the corrosion current density of the coating ( j corr = 1.41 × 10 −8 A cm −2 ) was three orders of magnitude lower than that of the bare magnesium alloy, and the corresponding low-frequency impedance modulus (| Z | f = 0.01 Hz = 554.65 kΩ cm 2 ) increased by three orders of magnitude, verifying high corrosion resistance. Moreover, all contact angles (CA) of common liquid stains in life were higher than 150°, indicating the good anti-fouling capability of the NiSA coating.
研究领域:
材料科学
·
表面工程
·
电化学
·
腐蚀与防护
✓ 已验证
DOI
SURFACE REVIEW AND LETTERS
·
2023
·
IF 1.1
JINGBAO WANG,MOHAMMAD TABISH,JINGMAO ZHAO
Magnesium alloy with good application potential has a poor corrosion resistance, so it is essential to develop a new corrosion inhibitor and investigate the inhibition mechanism for magnesium alloy. In this work, three vapor phase corrosion inhibitors (VCIs) were used for AZ31B magnesium alloy under a simulated ocean–atmosphere environment, and the inhibition behaviors and mechanisms were studied. The inhibition performances of the three VCIs were evaluated by Digital Still Camera, electrochemical tests and scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) combined with X-ray photoelectron spectroscopy (XPS) was used to further explore the inhibition mechanism. Compared to benzoic acid and ammonium benzoate, o-phthalic anhydride can provide the best protection for AZ31B magnesium alloy. The i corr was reduced from 11.18 μ A cm − 2 (blank) to 0.65 μ A cm − 2 and the ( R f + R ct ) was increased from 1478.1 Ω cm 2 (blank) to 3129.8 Ω cm 2 with o-phthalic anhydride as VCI. O-phthalic anhydride combined with Mg 2 + to form different complexes with different molecular weights, which developed a more compact protective film on the AZ31B surface. Overall, the o-phthalic anhydride can be utilized as an excellent VCI for AZ31B magnesium alloy in a simulated ocean–atmosphere environment.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 28
·16712-16719
·
IF 10.733
Fanfan Liu,Yongchang Liu,Xudong Zhao,Xiaobin Liu,Li-Zhen Fan
In this paper, we report on the fabrication of MXenes sandwiched by carbon nanospheres (MXenes@C) and their application as an electrode for magnesium-ion storage. The heterostructure synthesis is realized via electrostatic interactions between negatively charged 2D MXene nanosheets and positively charged 3D carbon nanospheres. This approach effectively opens up the interlayer and prevents the restacking of MXene nanosheets, thus promoting the electrolyte transport and shortening the ion diffusion path. Through ex situ X-ray diffraction characterization and density functional theory computations, the magnesiation/demagnesiation mechanism and Mg-migration kinetics of the tailored Ti3C2Tx@C nanospheres are elucidated. Using Ti3C2Tx@C as a cathode for magnesium-ion batteries, a remarkable reversible specific capacity (198.7 mA h g−1 at 10 mA g−1), outstanding rate capability (123.3 mA h g−1 at 200 mA g−1), and impressive cycling stability (∼85% capacity retention after 400 cycles) are achieved. This method can also be applied to other MXenes, such as V2CTx, to prepare a sandwich-structure with nice rate performance and cycle life. The synthesis of MXene@C nanospheres using a simple self-assembly method offers new and feasible avenues to develop promising Mg-storage materials with excellent capacity and long cycle life.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
无机非金属材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xinyin Cai,Yanan Xu,Qinyou An,Yalong Jiang,Ziang Liu,Fangyu Xiong,Wenyuan Zou,Gang Zhang,Yuhang Dai,Ruohan Yu,Liqiang Mai
Magnesium metal batteries have attracted much attention due to the good safety, low cost of magnesium and high theoretical volumetric capacity. However, developing magnesium metal batteries is restricted by large polarization and sluggish kinetics during Mg insertion/deinsertion process. Herein, TiO 2 ultrafine nanocrystals derived from Ti-metal–organic-framework (Ti-MOF) are applied as the cathodes in magnesium metal batteries. Remarkably, an ultralong life of the Mg(s) || TiO 2 battery can be obtained during cycling (capacity retention of 75% after 1000 cycles). On the basis of in-situ XRD characterization and cyclic voltammetry analysis, a high pseudocapacitive performance is found, which results in the high kinetics. Moreover, according to Arrhenius behavior, carbon skeleton in TiO 2 cathode can facilitate ion migration and Faraday reaction, thus improving the magnesium storage performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 11
·3495-3502
·
IF 4.174
Yu Wang,Zhenmin Ding,Xinjun Li,Shuqin Ren,Shuhua Zhou,Hongming Zhang,Yuan Li,Shumin Han
Magnesium hydride is considered to be one of the most desirable hydrogen storage materials due to its high weight capacity (7.6 wt% H2) and low price. However, its relatively high operating temperatures and slow dynamics have always hampered its commercial applications. In this paper, nano-nickel particle coated nitrogen-doped carbon spheres (Ni@NCS) were synthesized by a chemical reduction method and then introduced into Mg to form an MgH2–Ni@NCS composite via hydriding combustion and subsequent high-energy ball milling processes. The results showed that the MgH2–Ni@NCS composite possessed high hydrogen storage capacity and fast absorbing/desorbing kinetics, absorbing 5.7 wt% H2 and desorbing 4.3 wt% H2 within 8 min at 623 K. Moreover, the capacity shows negligible degradation after 10 cycles, indicating that the MgH2–Ni@NCS composite has good cycling stability. Even at relatively low temperature (373 K), the MgH2–Ni@NCS composite still absorbed 4.2 wt% H2 within 60 min compared to 0.9 wt% H2 for milled MgH2. The improvement in hydrogen storage properties is ascribed to the in situ formed Mg2NiH4 induced dehydrogenation of MgH2 and effective prevention of the agglomeration of magnesium during the hydriding/dehydriding reaction by the carbon material.
研究领域:
材料科学
·
能源化学
·
纳米催化
·
储氢技术
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 11
·5243-5250
·
IF 2.961
Liu Min,Zhang Qiang,Gao Jianxin,Liu Qianfeng,Wang Erdong,Wang Zhenbo
Mg-air battery is a promising electrochemical system for high-energy–density, long storage application. However, its commercialization is hindered by the low anode utilization rate mainly caused by the serious hydrogen evolution reaction (HER) in traditional NaCl aqueous electrolyte. Herein, we report NaBF 4 -dimethyl sulfoxide (DMSO)/NaCl-H 2 O biphasic electrolytes to alleviate the anode HER corrosion by allowing anodic reaction to take place in organic solution DMSO while ensuring high cathode activity with applying cathode reaction to occur in NaCl-H 2 O solution. The discharge results show that its utilization rate of AZ61 alloy in NaBF 4 -DMSO/NaCl-H 2 O biphasic electrolytes is increased to 67% at 1 mA cm −2 which is 17% higher than in NaCl-H 2 O single electrolyte, and the anode energy density is up to 2020 Wh kg −1 . In addition, even at 15 mA cm −2 , its discharge voltage is still up to 1.02 V which is higher than that in similar literatures using organic electrolytes for Mg anode.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）