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学者姓名:赵玉龙

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< Page ,Total 41 >
Facile Synthesis of Bimetal Nickel Cobalt Phosphate Nanostructures for High-Performance Hybrid Supercapacitors EI
期刊论文 | 2022 , 893 | Journal of Alloys and Compounds
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Abstract :

Herein, bimetal nickel-cobalt phosphate (NiCoP) nanostructures coated on nickel foam (NF) were synthesized for hybrid supercapacitors by a facile one-step potentiostatic electrodeposition method. The optimization of the capacitive performance for supercapacitors was achieved by varying the deposition time from 5 to 20 min. When the electrodeposition time was 15 min, an optimal performance with the NiCoP/NF-2 was achieved. A specific capacity of 883 C·g−1 was recorded at a current density of 1 A·g−1, a best rate performance of 87% along with a highest coulombic efficiency of 100%, revealing good capacitive performance and excellent reversibility. Furthermore, NiCoP/NF-2 was assessed as a positive electrode in a hybrid supercapacitor. Using activated carbon (AC) as a negative electrode, the assembled device exhibited an energy density of 54 Wh·kg−1 at a power density of 2.7 kW·kg−1 with a large working potential window of 0–1.8 V. After charging to 3.6 V for 19 s, two hybrid supercapacitor devices connected in series could light up a red LED for 191 s, which indicates that the proposed electrodeposition synthesis process and the prepared NiCoP composites hold high potential for applications in the field of energy storage technology. © 2021 Elsevier B.V.

Keyword :

Energy storage Nanostructures Cobalt compounds Electrodeposition Electrodes Supercapacitor Activated carbon Nickel compounds

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GB/T 7714 Li, Min , Luo, Yunyun , Jia, Chen et al. Facile Synthesis of Bimetal Nickel Cobalt Phosphate Nanostructures for High-Performance Hybrid Supercapacitors [J]. | Journal of Alloys and Compounds , 2022 , 893 .
MLA Li, Min et al. "Facile Synthesis of Bimetal Nickel Cobalt Phosphate Nanostructures for High-Performance Hybrid Supercapacitors" . | Journal of Alloys and Compounds 893 (2022) .
APA Li, Min , Luo, Yunyun , Jia, Chen , Zhang, Qiankun , Luo, Guoxi , Zhao, Libo et al. Facile Synthesis of Bimetal Nickel Cobalt Phosphate Nanostructures for High-Performance Hybrid Supercapacitors . | Journal of Alloys and Compounds , 2022 , 893 .
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Au-assisted polymerization of conductive poly(N-phenylglycine) as high-performance positive electrodes for asymmetric supercapacitors EI PubMed
期刊论文 | 2022 , 33 (4) | Nanotechnology
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Abstract :

Herein, a novel conductive poly(N-phenylglycine) (PNPG) polymer was successfully prepared, by in situ electrochemical polymerization method (+0.75 V versus Ag/AgCl) for 10 min, on flexible stainless-steel plate coated with a thin Au film (Au/SS) to serve as a binder-free pseudocapacitive PNPG/Au/SS electrode for energy storage devices. Compared to the electrode without Au coating, PNPG/Au/SS electrode exhibited better electrochemical performance with larger specific capacitance (495 F g-1 at a current density of 2 A g-1), higher rate performance and lower resistance, which are good indications to act as a positive electrode for asymmetric supercapacitor devices. Combined with activated carbon as a negative electrode, an asymmetric supercapacitor device was constructed. It displayed a specific capacitance of 38 F g-1 at a current density of 0.5 A g-1 and an energy density of 5.3 Wh kg-1 at a power density of 250 W kg-1. Experimentally, two asymmetric supercapacitor devices were connected in series to power a home-made windmill continuously for 8 s, revealing the high potential of this novel conductive polymer material for energy storage application. © 2022 Institute of Physics Publishing. All rights reserved.

Keyword :

Activated carbon Energy storage Electrochemical electrodes Supercapacitor Capacitance Electrochemical deposition Polymerization Reduction Plastic coatings

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GB/T 7714 Li, Min , Luo, Yunyun , Jia, Chen et al. Au-assisted polymerization of conductive poly(N-phenylglycine) as high-performance positive electrodes for asymmetric supercapacitors [J]. | Nanotechnology , 2022 , 33 (4) .
MLA Li, Min et al. "Au-assisted polymerization of conductive poly(N-phenylglycine) as high-performance positive electrodes for asymmetric supercapacitors" . | Nanotechnology 33 . 4 (2022) .
APA Li, Min , Luo, Yunyun , Jia, Chen , Huang, Mimi , Yu, Mingzhi , Luo, Guoxi et al. Au-assisted polymerization of conductive poly(N-phenylglycine) as high-performance positive electrodes for asymmetric supercapacitors . | Nanotechnology , 2022 , 33 (4) .
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Modification mechanism of collaborative ions implanted into 4H-SiC by atomic simulation and experiment EI SCIE
期刊论文 | 2021 , 212 | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
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Abstract :

Ion implantation is increasingly applied to assist machining micro/nano devices in academic research and industry. A method of heavy ions assisted light ions implantation was proposed to modify 4H-SiC for reducing difficulty in ultra-precision machining. First, a three-dimensional molecular dynamics (MD) simulation model for ion implantation into SiC surface was established. The lattice damage mechanism of SiC under implantation of different ions including H+, Cu2+, and collaboration of Cu2+ and H+was studied. Projection range of the model with collaboration of Cu2+ and H+ was the largest. Then, the workpiece after ion implantation was annealed to study residual stress. The results show that high-temperature annealing contributes to reducing residual tensile stress. Finally, a MD model with length of 1530 angstrom along the Z-axis was built to compare with actual experiments using the same ion implantation parameters. The resulted subsurface damage values were quite close which demonstrates feasibility of the MD model. Surface morphology, cross-section of the defects, and threedimensional ion distribution on the implanted samples surface were also observed and displayed. As demonstrated by simulation and experiments, the method of collaborative ion implantation can effectively modify surface of hard and brittle materials and bring benefits for subsequent ultra-precision machining.

Keyword :

Subsurface damage Projection range Residual stress Molecular dynamics simulation Ion implantation

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GB/T 7714 Kang, Qiang , Fang, Xudong , Wu, Chen et al. Modification mechanism of collaborative ions implanted into 4H-SiC by atomic simulation and experiment [J]. | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2021 , 212 .
MLA Kang, Qiang et al. "Modification mechanism of collaborative ions implanted into 4H-SiC by atomic simulation and experiment" . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 212 (2021) .
APA Kang, Qiang , Fang, Xudong , Wu, Chen , Sun, Hao , Tian, Bian , Zhao, Libo et al. Modification mechanism of collaborative ions implanted into 4H-SiC by atomic simulation and experiment . | INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES , 2021 , 212 .
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Nonlinear behavior analysis of electrostatically actuated multilayer anisotropic microplates with residual stress EI SCIE
期刊论文 | 2021 , 255 | Composite Structures
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Abstract :

Electrostatically actuated microplates with multilayer and material anisotropy properties, are widely employed in microelectromechanical systems. However, previous theories rarely consider the aforementioned properties simultaneously, hindering their widespread application. This paper proposes a general theoretical model for electrostatically actuated rectangular multilayer anisotropic microplates subjected to residual stress and hydrostatic pressure by combining the classical laminated thin plate theory, Galerkin method and a partial expansion approach for nonlinear electrostatic force. This model enables successful establishment of closed-form expressions for the main mechanical behaviors, e.g. the pull-in voltage, static deflection, and resonant frequency. Validation of these expressions, using finite element method simulations and experimental results, shows significant improvement in the analysis accuracy (15 times higher) compared to those theories neglecting the material anisotropy, as well as excellent applicability across a wide range of DC voltages and dimensions. Additionally, the influences of electrostatic softening effects and scale effects on the theories are also discussed. © 2020 Elsevier Ltd

Keyword :

Hydrostatic pressure Electrostatic actuators MEMS Electromechanical devices Anisotropy Galerkin methods Electrostatics Multilayers Residual stresses Natural frequencies

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GB/T 7714 Li, Zhikang , Zhao, Libo , Li, Jie et al. Nonlinear behavior analysis of electrostatically actuated multilayer anisotropic microplates with residual stress [J]. | Composite Structures , 2021 , 255 .
MLA Li, Zhikang et al. "Nonlinear behavior analysis of electrostatically actuated multilayer anisotropic microplates with residual stress" . | Composite Structures 255 (2021) .
APA Li, Zhikang , Zhao, Libo , Li, Jie , Zhao, Yihe , Xu, Tingzhong , Liu, Zichen et al. Nonlinear behavior analysis of electrostatically actuated multilayer anisotropic microplates with residual stress . | Composite Structures , 2021 , 255 .
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Magnetoelectric devices based on magnetoelectric bulk composites EI SCIE
期刊论文 | 2021 , 9 (17) , 5594-5614 | JOURNAL OF MATERIALS CHEMISTRY C
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Abstract :

Magnetoelectric (ME) composites of bulk structures show strong ME coupling performance, and thus magnetoelectric bulk composites and their related devices have been attracting increasing attention over the last few years. Two kinds of ME coupling mechanisms can be found in ME bulk composites, i.e., direct ME coupling and converse ME coupling, where electric field control of magnetization or magnetic field control of ferroelectric polarization can be achieved. Then, ultra-fast, low-power, and miniaturized electronics can be developed based on the novel functionalities of both direct and converse ME coupling effects. Direct ME coupling is used in devices such as ME sensors and energy harvesters, while converse ME coupling is used in voltage tunable inductors, bandstop filters, ME antennas, tunable resonators, etc. Here, we present a review of bulk structure ME composite materials, as well as some notable potential applications of ME composites, with emphasis on both the opportunities and challenges for the application of ME composites. The performance of ME bulk composites, their coupling structures, state-of-the-art device applications, and perspectives on direct (magnetic to electric) and converse (electric to magnetic) ME devices are summarized.

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GB/T 7714 Mao, Qi , Wu, Jingen , Hu, Zhongqiang et al. Magnetoelectric devices based on magnetoelectric bulk composites [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2021 , 9 (17) : 5594-5614 .
MLA Mao, Qi et al. "Magnetoelectric devices based on magnetoelectric bulk composites" . | JOURNAL OF MATERIALS CHEMISTRY C 9 . 17 (2021) : 5594-5614 .
APA Mao, Qi , Wu, Jingen , Hu, Zhongqiang , Xu, Yiwei , Du, Yongjun , Hao, Yuanbo et al. Magnetoelectric devices based on magnetoelectric bulk composites . | JOURNAL OF MATERIALS CHEMISTRY C , 2021 , 9 (17) , 5594-5614 .
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Curvature effect on surface topography and uniform scallop height control in normal grinding of optical curved surface considering wheel vibration EI SCIE
期刊论文 | 2021 , 29 (6) , 8041-8063 | Optics Express
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Abstract :

High-precision optical components with complex shapes or microstructures have been extensively used in numerous fields such as biomedicine, energy and aerospace. In order to accurately achieve the specific functions of the components, the form accuracy and uniform surface quality need to reach an ever-high level. To achieve this, ultra-precision normal grinding is used for machining various types of complex optical surfaces. However, the intricate variation of the workpiece curvature and grinding wheel vibration gives rise to great challenges to obtain higher precision and uniform surface conditions. In this study, the influence of curvature on surface topography generation has been investigated and a novel model of scallop height has been developed for surface topography generation in the normal grinding of the curved surface. In addition, the relative influence of the curvature is analyzed experimentally, in which the micro-waviness generation as a consequence of the unbalanced vibration of the grinding wheel is modeled and validated by experiments. Finally, the micro sinusoidal array with the setting value for scallop height is achieved by controlling the feed speed, which is determined by the local curvature of surface profile. The results indicated that the curvature variation posed a significant effect on surface uniformity and the model is valid to achieve surface scallop height control in the normal grinding effectively. © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Keyword :

Wheels Vibration analysis Topography Molluscs Grinding wheels Surface topography Grinding (machining) Shellfish

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GB/T 7714 Chen, Shanshan , Yang, Shuming , Liao, Zhirong et al. Curvature effect on surface topography and uniform scallop height control in normal grinding of optical curved surface considering wheel vibration [J]. | Optics Express , 2021 , 29 (6) : 8041-8063 .
MLA Chen, Shanshan et al. "Curvature effect on surface topography and uniform scallop height control in normal grinding of optical curved surface considering wheel vibration" . | Optics Express 29 . 6 (2021) : 8041-8063 .
APA Chen, Shanshan , Yang, Shuming , Liao, Zhirong , Cheung, Chi Fai , Jiang, Zhuangde , Zhang, Feihu . Curvature effect on surface topography and uniform scallop height control in normal grinding of optical curved surface considering wheel vibration . | Optics Express , 2021 , 29 (6) , 8041-8063 .
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Crystal cleavage, periodic nanostructure and surface modification of SiC ablated by femtosecond laser in different media EI SCIE
期刊论文 | 2021 , 424 | SURFACE & COATINGS TECHNOLOGY
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Abstract :

SiC, as one typical 3rd generation semiconductor, has high potential to be used as the substrate for harsh environment sensors. However, the etching of this material is still challenging. Femtosecond laser has been demonstrated to have great potential in SiC etching, but the material removal mechanisms need further investigation. Herein, the two-temperature model considering carrier concentration is utilized to illustrate the microscopic mechanism of carrier concentration and temperature change in SiC caused by femtosecond laser irradiation. An 800 nm, 50 fs, 10 Hz Ti: sapphire femtosecond laser was used to process SiC in different media including air, HF and water. The ablation threshold of SiC in the three media is calculated. The highest ablation threshold (4.98 J/cm(2)) is obtained when the pulse number N = 50, in air. The lowest ablation threshold (0.53 J/cm(2)) is obtained when the pulse number N = 300, in HF. Results indicate that ablation threshold is strongly dependent on the laser pulse number and processing medium. Based on the cleavage phenomenon of SiC crystal structure observed by micro-nano characterization, the mechanism model of femtosecond laser-induced periodic structure of SiC surface based on material lattice cleavage is established, and the relationship between the intrinsic texture and the evolution of periodic structure of ablation surface is revealed. This will provide a new way to understand the ablation mechanism of femtosecond laser. In addition, the processing media has significant effect on surface roughness and chemical bond characteristics of SiC. Liquid processing media can reduce the surface roughness and avoid oxidation, which is helpful to manufacture SiC devices with specific surface requirements using femtosecond laser as an auxiliary method.

Keyword :

SiC sensor Material lattice cleavage Periodic surface nanostructure Femtosecond laser ablation Surface morphology

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GB/T 7714 Wu, Chen , Fang, Xudong , Kang, Qiang et al. Crystal cleavage, periodic nanostructure and surface modification of SiC ablated by femtosecond laser in different media [J]. | SURFACE & COATINGS TECHNOLOGY , 2021 , 424 .
MLA Wu, Chen et al. "Crystal cleavage, periodic nanostructure and surface modification of SiC ablated by femtosecond laser in different media" . | SURFACE & COATINGS TECHNOLOGY 424 (2021) .
APA Wu, Chen , Fang, Xudong , Kang, Qiang , Sun, Hao , Zhao, Libo , Tian, Bian et al. Crystal cleavage, periodic nanostructure and surface modification of SiC ablated by femtosecond laser in different media . | SURFACE & COATINGS TECHNOLOGY , 2021 , 424 .
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A Wearable Strain Sensor Based on Fiber-structured PU/MXene/CNT Composite with Ultra-high Sensitivity and Broad Sensing Range EI CPCI-S
会议论文 | 2021 , 1362-1365 | 16th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (IEEE-NEMS)
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Abstract :

As the critical branch of wearable sensors, strain sensors with lightweight and high stretchability have been widely demanded in human gesture recognition and robotics engineering. However, most strain sensors cannot simultaneously satisfy the requirements of high sensitivity and a broad detection range, attributed to the poor stretchability and fixed connection of commonly used sensing elements. Here, a single-fiber structure composed of polyurethane (PU) as the stretchable core and MXenes/Carbon nanotubes (CNTs) as the conductive shell was fabricated by wet spinning followed with repeated dip-coating. The obtained highly stretchable fiber exhibited superior strain sensing performance, including ultra-high sensitivity (gauge factor up to 2504.1), a large detection range (up to 250%), and good stability (over 1000 cycles).Furthermore, the PU/MXene/CNT single-fiber strain sensor (SFSS) can be utilized to detect human motion signals, such as folding of finger, bending of wrist, arm and knee. Benefiting from the integrated features of high sensitivity and stretchability, this SFSS promises a great application potential in the field of human gesture recognition and smart robotics.

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GB/T 7714 Luo, Guoxi , Zh, Qiankun , Luo, Yunyun et al. A Wearable Strain Sensor Based on Fiber-structured PU/MXene/CNT Composite with Ultra-high Sensitivity and Broad Sensing Range [C] . 2021 : 1362-1365 .
MLA Luo, Guoxi et al. "A Wearable Strain Sensor Based on Fiber-structured PU/MXene/CNT Composite with Ultra-high Sensitivity and Broad Sensing Range" . (2021) : 1362-1365 .
APA Luo, Guoxi , Zh, Qiankun , Luo, Yunyun , Chen, Ke , Zhou, Wenke , Zh, Libo et al. A Wearable Strain Sensor Based on Fiber-structured PU/MXene/CNT Composite with Ultra-high Sensitivity and Broad Sensing Range . (2021) : 1362-1365 .
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Review on Viscosity Measurement Sensor Based on Micro-electromechanical Systems Technology EI
期刊论文 | 2021 , 57 (8) , 13-22 | Journal of Mechanical Engineering
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Viscosity has been regarded as an essential issue of fluid characteristics in a widespread field, such as biochemical engineering, since it is the basic thermal property to control the production process, ensure safe production, and conduct medical diagnosis and scientific research. In order to achieve a high-precision and high-efficiency viscosity measurement in various fields, in recent years, the viscosity measurement methods have not been limited to traditional macro measurements, such as capillary method, and rotational method. But the viscosity measurement technology under micro-nano scale has shown its outstanding development and application prospects. The rapid development of micro-electromechanical systems (MEMS) technology has promoted the viscosity measurement to integration, intelligence and real-time. Meanwhile, diversified viscosity measurement methods have continuously emerged. The resonant viscosity measurement has received extensive and in-depth attention, which has shown remarkable performance. The traditional viscosity measurement methods are briefly recalled, and then the resonant methods for viscosity determination based on micro- electromechanical system technology are introduced, with summarizing their outstanding characteristics. Finally, the development trend of viscosity measurement methods based on MEMS resonance technology is prospected. © 2021 Journal of Mechanical Engineering.

Keyword :

Viscosity measurement Diagnosis MEMS Nanotechnology Viscosity Real time systems Thermal Engineering

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GB/T 7714 Huang, Linya , Zhao, Libo , Luo, Guoxi et al. Review on Viscosity Measurement Sensor Based on Micro-electromechanical Systems Technology [J]. | Journal of Mechanical Engineering , 2021 , 57 (8) : 13-22 .
MLA Huang, Linya et al. "Review on Viscosity Measurement Sensor Based on Micro-electromechanical Systems Technology" . | Journal of Mechanical Engineering 57 . 8 (2021) : 13-22 .
APA Huang, Linya , Zhao, Libo , Luo, Guoxi , Li, Zhikang , Wu, Dezhi , Lin, Qijing et al. Review on Viscosity Measurement Sensor Based on Micro-electromechanical Systems Technology . | Journal of Mechanical Engineering , 2021 , 57 (8) , 13-22 .
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Temperature-insensitive silicon resonant pressure sensor by thermal stress control EI SCIE
期刊论文 | 2021 , 322 | Sensors and Actuators, A: Physical
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A temperature-insensitive silicon resonant pressure sensor is developed with an extremely low temperature coefficient of frequency (TCF). A novel self-compensation method is proposed to counteract the effect of the elastic modulus temperature coefficient (TCE) of silicon on the TCF by the thermal stress generated by vacuum packaging layers. On this basis, a positive TCFS shift is introduced by thermal tensile stress, and a negative TCFE shift is introduced by the TCE of silicon. The TCFS shifts can be adjusted as close as possible to the value of −TCFE by adjusting the thickness of the diaphragm and resonator, sharply decreasing the total TCF. The resonant pressure-sensing chip is fabricated using micromachining technology. Experimental results show that the maximum TCF value of the proposed resonant pressure sensor is 7.3 ppm/°C (that is, 0.46 Hz/°C). Moreover, its nonlinearity after polynomial compensation is better than 0.01% FS at the temperature ranging from −10 to +60 . © 2021 Elsevier B.V.

Keyword :

Silicon Temperature Pressure sensors Thermal stress

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GB/T 7714 Zhao, Libo , Han, Xiangguang , Mao, Qi et al. Temperature-insensitive silicon resonant pressure sensor by thermal stress control [J]. | Sensors and Actuators, A: Physical , 2021 , 322 .
MLA Zhao, Libo et al. "Temperature-insensitive silicon resonant pressure sensor by thermal stress control" . | Sensors and Actuators, A: Physical 322 (2021) .
APA Zhao, Libo , Han, Xiangguang , Mao, Qi , Li, Zhikang , Yang, Ping , Lin, Qijing et al. Temperature-insensitive silicon resonant pressure sensor by thermal stress control . | Sensors and Actuators, A: Physical , 2021 , 322 .
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