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Featured researches published by Binbin Wei.


Journal of Materials Chemistry | 2017

CrN thin films prepared by reactive DC magnetron sputtering for symmetric supercapacitors

Binbin Wei; Hanfeng Liang; Dongfang Zhang; Z.T. Wu; Zhengbing Qi; Zhoucheng Wang

Supercapacitors have been becoming indispensable energy storage devices in micro-electromechanical systems and have been widely studied over the past few decades. Transition metal nitrides with excellent electrical conductivity and superior cycling stability are promising candidates as supercapacitor electrode materials. In this work, we report the fabrication of CrN thin films using reactive DC magnetron sputtering and further their applications for symmetric supercapacitors for the first time. The CrN thin film electrodes fabricated under the deposition pressure of 3.5 Pa show an areal specific capacitance of 12.8 mF cm−2 at 1.0 mA cm−2 and high cycling stability with 92.1% capacitance retention after 20 000 cycles in a 0.5 M H2SO4 electrolyte. Furthermore, our developed CrN//CrN symmetric supercapacitor can deliver a high energy density of 8.2 mW h cm−3 at the power density of 0.7 W cm−3 along with outstanding cycling stability. Thus, the CrN thin films have great potential for application in supercapacitors and other energy storage systems.


RSC Advances | 2016

Microstructure and corrosion behavior of hafnium coatings on AZ91D magnesium alloys by magnetron sputtering

Dongfang Zhang; Zhengbing Qi; Binbin Wei; Zhoucheng Wang

Hf coatings are fabricated on the AZ91D Mg alloys by magnetron sputtering with bias voltage ranges from 0 to −125 V. Both potentiodynamic polarization test and neutral salt spray test reveal that the Hf coating deposited at −100 V exhibits the best protective performance. It possesses the lowest corrosion current density of 1.032 μA cm−2 and the highest protection rate of 6, respectively. This perfect anticorrosion property is due to the dense structure and low porosity induced by applying the appropriate bias voltage. Various types of corrosion sites after corrosion tests are examined in detail. The results indicate that the coating failure is strongly dependent on the coating defects and the random phase distribution in the substrate.


Surface & Coatings Technology | 2016

A comparative study on the corrosion behaviour of Al, Ti, Zr and Hf metallic coatings deposited on AZ91D magnesium alloys

Dongfang Zhang; Binbin Wei; Z.T. Wu; Zhengbing Qi; Zhoucheng Wang


Vacuum | 2017

High temperature oxidation behavior and wear resistance of Ti0.53Al0.47N coating by cathodic arc evaporation

Z.T. Wu; P. Sun; Zhengbing Qi; Binbin Wei; Zhichao Wang


Surface & Coatings Technology | 2016

Evaluating the influence of adding Nb on microstructure, hardness and oxidation resistance of CrN coating

Z.T. Wu; Zhengbing Qi; Dongfang Zhang; Binbin Wei; Z.C. Wang


Vacuum | 2017

Effect of sputtering power on the chemical composition, microstructure and mechanical properties of CrNx hard coatings deposited by reactive magnetron sputtering

Zhengbing Qi; Z.T. Wu; Dongfang Zhang; Binbin Wei; Jinhuo Wang; Zhoucheng Wang


Journal of The European Ceramic Society | 2016

Understanding hardness evolution of Zr–Si–N nanocomposite coatings via investigating their deformation behaviors

Z.T. Wu; Zhengbing Qi; Binbin Wei; Dongfang Zhang; Z.C. Wang


Ceramics International | 2018

Microstructure and corrosion behaviors of conductive Hf/HfN multilayer coatings on magnesium alloys

Dongfang Zhang; Zhengbing Qi; Binbin Wei; Hao Shen; Zhoucheng Wang


Surface & Coatings Technology | 2017

Anticorrosive yet conductive Hf/Si3N4 multilayer coatings on AZ91D magnesium alloy by magnetron sputtering

Dongfang Zhang; Zhengbing Qi; Binbin Wei; Z.T. Wu; Zhoucheng Wang


Journal of Energy Chemistry | 2017

One-step synthesis of graphitic-C 3 N 4 /ZnS composites for enhanced supercapacitor performance

Binbin Wei; Hanfeng Liang; Rongrong Wang; Dongfang Zhang; Zhengbing Qi; Zhoucheng Wang

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Zhengbing Qi

Xiamen University of Technology

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