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  • Wiley  (5)
  • 1
    Online Resource
    Online Resource
    Facile Synthesis of Sheet Stacking Structure NiCo 2 S 4 @PPy with Enhanced Rate Capability and Cycling Performance for Aqueous Supercapacitors
    Wiley ; 2020
    In:  Energy Technology Vol. 8, No. 6 ( 2020-06)
    Details
    In: Energy Technology, Wiley, Vol. 8, No. 6 ( 2020-06)
    Abstract: A NiCo 2 S 4 @PPy series with sheet stacking structure and suitable pore size distribution is successfully synthesized through a one‐step vulcanization process and polymerization process. Interestingly, the abundant sites and large electroactive surface area of NiCo 2 S 4 @PPy stacking structure are formed via the “etching effect” of S 2− ions and ultrasonic oscillation effect, which render the morphology of NiCo 2 S 4 @PPy with a lamellar feature. In contrast, polypyrrole (PPy) with good conductivity provides favorable electron transport pathways for electrolyte ions. The as‐prepared sheet stacking structure NiCo 2 S 4 @PPy (NCSP‐3) electrode delivers good electrochemical properties with the highest specific capacitance of 1606.6 F g −1 at 1 A g −1 and excellent rate performance of 77.4% at high discharge rate of 10 A g −1 . Furthermore, the NCSP‐3 electrode exhibits remarkable cycling stability, where the ultimate specific capacitance has no attenuation (retained at around 100%) compared with its incipient value after 20 000 cycles even at 20 A g −1 . These promising results can be put down to the unique structure and synergetic effect of NiCo 2 S 4 and PPy, which ensure good conductivity, more redox reactions, as well as large specific surface area. This work has guiding significance for the general and low‐cost route design of high‐performance electrode materials for supercapacitor applications.
    Type of Medium: Online Resource
    ISSN: 2194-4288 , 2194-4296
    URL: Issue
    URL: Article
    DOI: 10.1002/ente.v8.6
    DOI: 10.1002/ente.202000096
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2700412-0
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    Online Resource
  • 2
    Online Resource
    Online Resource
    In Situ Construction of Multibuffer Structure 3D CoSn@SnO x /CoO x @C Anode Material for Ultralong Life Lithium Storage
    Wiley ; 2020
    In:  Energy Technology Vol. 8, No. 3 ( 2020-03)
    Details
    In: Energy Technology, Wiley, Vol. 8, No. 3 ( 2020-03)
    Abstract: Rapid progress of lithium‐ion batteries (LIBs) highly relies on high‐performance electrode materials. Herein, a novel nanocomposite of CoSn alloy with a multishell layer structure confined in 3D porous carbon is constructed through a facile freeze drying and annealing treatment method. The skillful design effectively relieves the volume expansion of the Sn‐based alloy and enhances the combination between CoSn and carbon. Profiting from the synergistic effect of the multibuffer structure alloy and cross‐linked porous carbon, CoSn@SnO x /CoO x @C displays high capacity (912.6 mA h g −1 after 100 cycles at 0.1 A g −1 ) and excellent cycling stability (almost no capacity decay at 10 A g −1 after 1000 cycles) when used as anode for LIBs. The presence of Sn–O/Co–O bond makes the nanoalloy tightly pinned on the carbon substance and the structure stability of electrode material is improved significantly. Furthermore, the porous carbon with plentiful defects offers abundant room for the volume expansion of Sn and ensures fast transport of electrons/ions. Cyclic voltammogram (CV) curves under different scan rates reveal that the charge storage of the nanocomposite is controlled by pseudocapacitive and ion‐diffusion mechanisms. This facile fabrication strategy and unique structure design can be extended to other composite materials for energy storage devices.
    Type of Medium: Online Resource
    ISSN: 2194-4288 , 2194-4296
    URL: Issue
    URL: Article
    DOI: 10.1002/ente.v8.3
    DOI: 10.1002/ente.201900829
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2700412-0
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  • 3
    Online Resource
    Online Resource
    A Biocompatible and Near‐Infrared Liposome for In Vivo Ultrasound‐Switchable Fluorescence Imaging
    Wiley ; 2020
    In:  Advanced Healthcare Materials Vol. 9, No. 4 ( 2020-02)
    Details
    In: Advanced Healthcare Materials, Wiley, Vol. 9, No. 4 ( 2020-02)
    Abstract: Fluorescence imaging is a remarkable tool for molecular targeting and multicolor imaging, but it suffers from low resolution in centimeter‐deep tissues. The recently developed ultrasound‐switchable fluorescence (USF) imaging has overcome this challenge and achieved in vivo imaging in a mouse with help from the indocyanine green (ICG) dye encapsulated poly(N‐isopropylacrylamide) (ICG‐PNIPAM) contrast agent. However, the ICG‐PNIPAM has shortcomings, such as concerns about cytotoxicity and blueshifted excitation and emission spectra. This study introduces a newly developed ICG‐encapsulated liposome to broaden the contrast agent selection for USF imaging and resolve the issues mentioned above. The emission peak of the ICG‐liposome is 836 nm with excellent biostability and USF imaging capability. Furthermore, the cell viability test verifies the low cytotoxicity feature. Eventually, both ex vivo and in vivo USF imaging are successfully achieved and 3D USF images are acquired. The ex vivo result confirms that the ICG‐liposome maintains the thermoresponsive characteristic at the right lobe of the liver and is able to conduct the USF imaging. The further in vivo USF imaging demonstrates that although the whole liver emitted fluorescence, only the right lobe of the liver contains the working ICG‐liposome.
    Type of Medium: Online Resource
    ISSN: 2192-2640 , 2192-2659
    URL: Issue
    URL: Article
    DOI: 10.1002/adhm.v9.4
    DOI: 10.1002/adhm.201901457
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2645585-7
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  • 4
    Online Resource
    Online Resource
    Construction of Porous ZnS@Co 3 S 4 @NiO Nanosheets Hybrid Materials for High‐Performance Pseudocapacitor Electrode by Morphology Reshaping
    Wiley ; 2020
    In:  Advanced Sustainable Systems Vol. 4, No. 11 ( 2020-11)
    Details
    In: Advanced Sustainable Systems, Wiley, Vol. 4, No. 11 ( 2020-11)
    Abstract: Designing electrode materials with high reversible capacitance is the key to developing high‐performance pseudocapacitors. In this work, a novel ternary hybrid material, porous ZnS@Co 3 S 4 @NiO nanosheets are successfully constructed through a morphology reshaping enabled by a hydrothermal method followed by calcination. From a macroscopic view, the introduction of NiO changes the nanorod morphology of ZnS@Co 3 S 4 , and forms a porous nanosheet structure. The porous architecture with an increased specific surface area can promote the transport of ions and electrons, accelerate the diffusion of the electrolyte, and offer more active sites for electrochemical reactions. These advantages enhance the electrochemical properties of ZnS@Co 3 S 4 @NiO nanosheets when used as electrode materials for supercapacitors. ZnS@Co 3 S 4 @NiO nanosheets deliver an initial capacitance of 1418.7 F g −1 , and it also reaches 1550.9 F g −1 with a capacitance retention rate of 109.3% at 5 A g −1 , after 5000 cycles. However, ZnS@Co 3 S 4 nanorods only deliver an initial capacitance of 708.7 F g −1 , and maintain 716.4 F g −1 with a capacitance retention rate of 101.1% after 5000 cycles. These results show that the ZnS@Co 3 S 4 @NiO nanosheets are a promising electrode material for high‐performance pseudocapacitor electrode, and morphology reshaping is an effective strategy to design high‐performance pseudocapacitive materials.
    Type of Medium: Online Resource
    ISSN: 2366-7486 , 2366-7486
    URL: Issue
    URL: Article
    DOI: 10.1002/adsu.v4.11
    DOI: 10.1002/adsu.202000090
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2880982-8
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  • 5
    Online Resource
    Online Resource
    Detection of quasi‐periodic oscillations in γ ‐ray and optical light curves of the BL Lac 4FGL J0650 .7 + 2503
    Wiley ; 2022
    In:  Astronomische Nachrichten Vol. 343, No. 1-2 ( 2022-01)
    Details
    In: Astronomische Nachrichten, Wiley, Vol. 343, No. 1-2 ( 2022-01)
    Abstract: In this work, we have assembled the long‐term variability data of the blazar 4FGL J0650.7 + 2503 in the γ‐ray and the optical bands, spanning about 11.9 and 8.6 years, respectively. The light curves are then analyzed by using Lomb‐Scargle Periodogram, Weighted Wavelet Z‐transform, Jurkevich and discrete correlation function techniques, and the results reveal two possible timescales of quasi‐periodic oscillation: 500 ± 37 days for γ‐ray and 330 ± 20 days for optical. To explore the origin of the γ‐ray, we investigated between the optical and γ‐ray band correlations, and found that the correlation between the two bands is very significant. This correlation can be reasonably explained by the lepton self‐synchro‐Compton model. Based on the supermassive binary black hole system model, we estimate the primary black hole mass .
    Type of Medium: Online Resource
    ISSN: 0004-6337 , 1521-3994
    URL: Issue
    URL: Article
    DOI: 10.1002/asna.v343.1-2
    DOI: 10.1002/asna.20210024
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2025762-4
    detail.hit.zdb_id: 2171222-0
    SSG: 16,12
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