Key Laboratory of Superlight Material and Surface Technology

Harbin, China

Key Laboratory of Superlight Material and Surface Technology

Harbin, China

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Wu C.,Key Laboratory of Superlight Material and Surface Technology | Liu Q.,Key Laboratory of Superlight Material and Surface Technology | Chen R.,Key Laboratory of Superlight Material and Surface Technology | Chen R.,Harbin Engineering University | And 7 more authors.
ACS Applied Materials and Interfaces | Year: 2017

Superhydrophobic coatings are highly promising for protecting material surfaces and for wide applications. In this study, superhydrophobic composites, comprising a rhombic-dodecahedral zeolitic imidazolate framework (ZIF-8@SiO2), have been manufactured onto AZ31 magnesium alloy via chemical etching and dip-coating methods to enhance stability and corrosion resistance. Herein, we report on a simple strategy to modify hydrophobic hexadecyltrimethoxysilan (HDTMS) on ZIF-8@SiO2 to significantly improve the property of repelling water. We show that various liquids can be stable on its surface and maintain a contact angle higher than 150°. The morphologies and chemical composition were characterized by means of scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FI-IR). In addition, the anticorrosion and antiattrition properties of the film were assessed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization and HT, respectively. Such a coating shows promising potential as a material for large-scale fabrication. © 2017 American Chemical Society.


Wang J.,Harbin Engineering University | Wang J.,Key Laboratory of Superlight Material and Surface Technology | Wang J.,Harbin Institute of Technology | Song Y.,Harbin Engineering University | And 6 more authors.
Energy and Fuels | Year: 2010

Electrodes of Ni/Al layered double hydroxide (Ni/Al LDH) coated on the surface of nickel foam are successfully prepared by an in situ method using a mixed aqueous solution of nickel nitrate and aluminum. Their structure and surface morphology are studied by X-ray diffraction and scanning electron microscopy analysis. Their supercapacitance performances are investigated by cyclic voltammetry and constant current charge/discharge measurements. Results show that Ni/Al LDH nanoplatelets densely cover the nickel foam substrate. The electrode shows excellent electrochemical capacitive character and displays a specific capacitance of 701 F g-1 at a current density of 10 mA cm-2. The capacitance loss is less than 6% after 400 charge-discharge cycles. The larger contact area between the nickel foam supporter and active materials greatly enhances the use of Ni/Al LDH. © 2010 American Chemical Society.


Yang W.,Key Laboratory of Superlight Material and Surface Technology | Gao Z.,Key Laboratory of Superlight Material and Surface Technology | Wang J.,Key Laboratory of Superlight Material and Surface Technology | Wang J.,Harbin Engineering University | And 5 more authors.
ACS Applied Materials and Interfaces | Year: 2013

A Ni-Al layered double hydroxide (LDH), mutil-wall carbon nanotube (CNT), and reduced graphene oxide sheet (GNS) ternary nanocomposite electrode material has been developed by a facile one-step ethanol solvothermal method. The obtained LDH/CNT/GNS composite displayed a three-dimensional (3D) architecture with flowerlike Ni-Al LDH/CNT nanocrystallites gradually self-assembled on GNS nanosheets. GNS was used as building blocks to construct 3D nanostructure, and the LDH/CNT nanoflowers in turn separated the two-dimensional (2D) GNS sheets, which preserved the high surface area of GNSs. Furthermore, the generated porous networks with a narrow pore size distribution in the LDH/CNT/GNS composite were also demonstrated by the N2 adsorption/desorption experiment. Such morphology would be favorable to improve the mass transfer and electrochemical action of the electrode. As supercapacitor electrode material, the LDH/CNT/GNS hybrid exhibited excellent electrochemical performance, including ultrahigh specific capacitance (1562 F/g at 5 mA/cm2), excellent rate capability, and long-term cycling performance, which could be a promising energy storage/conversion material for supercapacitor application. © 2013 American Chemical Society.


Liu Q.,Key Laboratory of Superlight Material and Surface Technology | Liu Q.,Harbin Engineering University | Yang B.,Key Laboratory of Superlight Material and Surface Technology | Liu J.,Key Laboratory of Superlight Material and Surface Technology | And 8 more authors.
ACS Applied Materials and Interfaces | Year: 2016

Electrode materials derived from transition metal oxides have a serious problem of low electron transfer rate, which restricts their practical application. However, chemically doped graphene transforms the chemical bonding configuration to enhance electron transfer rate and, therefore, facilitates the successful fabrication of Co2Ni3ZnO8 nanowire arrays. In addition, the Co2Ni3ZnO8 electrode materials, considered as Ni and Zn ions doped into Co3O4, have a high electron transfer rate and electrochemical response capability, because the doping increases the degree of crystal defect and reaction of Co/Ni ions with the electrolyte. Hence, the Co2Ni3ZnO8 electrode exhibits a high rate property and excellent electrochemical cycle stability, as determined by electrochemical analysis of the relationship between specific capacitance, IR drop, Coulomb efficiency, and different current densities. From the results of a three-electrode system of electrochemical measurement, the Co2Ni3ZnO8 electrode demonstrates a specific capacitance of 1115 F g-1 and retains 89.9% capacitance after 2000 cycles at a current density of 4 A g-1. The energy density of the asymmetric supercapacitor (AC//Co2Ni3ZnO8) is 54.04 W h kg-1 at the power density of 3200 W kg-1. © 2016 American Chemical Society.

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