In Situ Engineering of the Core–Shell Ag@Cu Structure on Porous Nanowire Arrays for High Energy and Stable Aqueous Ag–Bi Batteries

2020 ◽  
Vol 12 (9) ◽  
pp. 10332-10340
Author(s):  
Xiaohui Li ◽  
Xing Zhou ◽  
Long Li ◽  
Danyang Zhao ◽  
Xinling Gong ◽  
...  
Keyword(s):  
High Energy ◽  
Nanowire Arrays ◽  
Core Shell ◽  
The Core

In situ growth of binder-free CNTs@Ni–Co–S nanosheets core/shell hybrids on Ni mesh for high energy density asymmetric supercapacitors

2016 ◽  
Vol 4 (22) ◽  
pp. 8888-8897 ◽  
Author(s):  
Tianquan Peng ◽  
Huan Yi ◽  
Peng Sun ◽  
Yuting Jing ◽  
Ruijing Wang ◽  
...  
Keyword(s):  
High Energy ◽  
High Energy Density ◽  
Cobalt Sulfide ◽  
Core Shell ◽  
Step Method ◽  
Asymmetric Supercapacitors ◽  
The Core ◽  
Nickel Cobalt ◽  
Binder Free

A facile two-step method has been developed to synthesize 3D core/shell-structured composites (CNTs@Ni–Co–S) composed of ternary nickel cobalt sulfide nanosheets (Ni–Co–S) as the shell and carbon nanotubes (CNTs) as the core on a flexible Ni mesh (Ni@CNTs@Ni–Co–S).

In situ synthesis of NiSe@CoP core–shell nanowire arrays on nickel foam as a highly efficient and robust electrode for electrochemical hydrogen generation in both alkaline and acidic media

2018 ◽  
Vol 8 (1) ◽  
pp. 128-133 ◽  
Author(s):  
Yuan-Zi Xu ◽  
Cheng-Zong Yuan ◽  
Zi-Wei Liu ◽  
Xue-Ping Chen
Keyword(s):  
Hydrogen Generation ◽  
Nickel Foam ◽  
In Situ Synthesis ◽  
Nanowire Arrays ◽  
Core Shell ◽  
Acidic Media ◽  
Highly Efficient ◽  
Efficient Generation

The efficient generation of hydrogen through the electro-splitting of water has attracted great attention.

Investigation on Carbonsphere@Nickel Cobalt Sulfide Core-shell Nanocomposite for Asymmetric Supercapacitor Application

2019 ◽  
Vol 6 (1-2) ◽  
pp. 1-13
Author(s):  
A. Simon Justin ◽  
P. Vickraman ◽  
B. Joji Reddy
Keyword(s):  
Metal Sulfide ◽  
High Energy ◽  
High Energy Density ◽  
Cobalt Sulfide ◽  
Core Shell ◽  
Carbon Sphere ◽  
Asymmetric Supercapacitor ◽  
Electrochemical Studies ◽  
The Core ◽  
Nickel Cobalt

Abstract The carbon sphere (CS)@nickel cobalt sulfide core-shell nanocomposite at five different mole ratios have been synthesized by a facile low-temperature water-bath method without any thermal treatment. The XRD results on CS, NiCo2S4 and its ternary complexation confirms nanocomposite formation which matches with the cubic structure. The FTIR confirms the complexation of CS and metal-sulfide core-shell. TEM morphology shows CS at NiCo2S4 forming a core-shell which appears as interlinked bunch of grapes. The BET surface analysis observes the high surface area for the core-shell. The XPS studies confirm the elemental presence and valence states of metal composition of the core-shell. Electrochemical studies on the pure NiCo2S4 and CS@NiCo2S4 have shown that CS@NiCo2S4 in 1:1 ratio (scn2) only exhibits higher specific capacitance of 838 F g−1 at 1 A g−1 with capacity retention of 89 % for 5000 cycles than other mole ratios. Using this scn2, asymmetric supercapacitor (ASC) device fabrication has been studied. The electrochemical studies on ASC reveal high energy density of 101 Wh kg−1 with the power density of 6.3 k W kg−1, and having good cycling stability with 92 % of capacitance retention even after 3000 cycles at 20 A g−1.

Influence of Nanoparticle Size on Strain at the Core-Shell Interface

2015 ◽  
Vol 662 ◽  
pp. 217-220 ◽  
Author(s):  
Ondrej Milkovič ◽  
Jana Michaliková ◽  
Jozef Bednarčík ◽  
Štefan Michalik
Keyword(s):  
Solid State ◽  
High Energy ◽  
Core Shell ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Core ◽  
Structure Of Nanoparticles ◽  
Fe Nanoparticles ◽  
Hall Method ◽  
Core Shell Structure

This work deals with the strain at the core-shell interface of Fe nanoparticles. Series of Fe nanoparticles with various mean diameters were prepared by precipitation in solid state in binary Cu-Fe alloy. Further, nanoparticles were isolated by dissolution of Cu matrix. High-energy X-ray diffraction (XRD) was used to probe structure of nanoparticles. XRD measurements suggest presence of the core-shell structure, where core and shell of the nanoparticles are formed of α-Fe and CuFe2O4 phase, respectively. Strains in core and shell were estimated as a function of nanoparticles size by Williamson-Hall method.

Synthesis Technology of Silica Aerogels/Polystyrene Core-Shell Composite Materials

2010 ◽  
Vol 168-170 ◽  
pp. 1833-1836
Author(s):  
Gang Qiang Geng ◽  
Jing Tao Guo ◽  
Jun Jun Zou ◽  
Gong Xun Bian
Keyword(s):  
Composite Materials ◽  
Polymerization Process ◽  
System Component ◽  
Core Shell ◽  
Ultrasound Technique ◽  
The Core ◽  
Optimum Reaction ◽  
The Impact ◽  
Shell Composite

In order to obtain super aerogels heat insulating composite materials with silane coupling agent on the in-situ surface treatment. The core-shell structure composite materials have been prepared by dispersion polymerization process of polystyrene grafted on the SiO2 particles. By TEM on these samples the impact of the system components initiator polymerization parameters and dispersion process was discussed. The results showed that the system component of the greatest impact on conversion rate is the ratio of aerogels /St ,the optimum reaction temperature is 75 °C.With organic initiator KPS as initiator after a unique ultrasound technique to obtain the core-shell composite materials structure which coating is 70%.

Hierarchical Co3O4@Au-decorated PPy core/shell nanowire arrays: an efficient integration of active materials for energy storage

2015 ◽  
Vol 3 (6) ◽  
pp. 2535-2540 ◽  
Author(s):  
Wei Hong ◽  
Jinqing Wang ◽  
Zhangpeng Li ◽  
Shengrong Yang
Keyword(s):  
Energy Storage ◽  
Interfacial Polymerization ◽  
Nanowire Arrays ◽  
Core Shell ◽  
Ni Foam ◽  
Active Materials ◽  
Efficient Integration

We have successfully fabricated hybrid Co3O4@Au-decorated PPy core/shell nanowire arrays (NWAs) on Ni foam via in situ interfacial polymerization between HAuCl4 and pyrrole monomers.

scholarly journals In-Situ Synchrotron SAXS and WAXS Investigation on the Deformation of Single and Coaxial Electrospun P(VDF-TrFE)-Based Nanofibers

2021 ◽  
Vol 22 (23) ◽  
pp. 12669
Author(s):  
Yi-Jen Huang ◽  
Yi-Fan Chen ◽  
Po-Han Hsiao ◽  
Tu-Ngoc Lam ◽  
Wen-Ching Ko ◽  
...  
Keyword(s):  
Hierarchical Structures ◽  
Electrospun Nanofibers ◽  
Mechanical Anisotropy ◽  
Core Shell ◽  
Length Scale ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Core ◽  
Nanofiber Alignment

Coaxial core/shell electrospun nanofibers consisting of ferroelectric P(VDF-TrFE) and relaxor ferroelectric P(VDF-TrFE-CTFE) are tailor-made with hierarchical structures to modulate their mechanical properties with respect to their constituents. Compared with two single and the other coaxial membranes prepared in the research, the core/shell-TrFE/CTFE membrane shows a more prominent mechanical anisotropy between revolving direction (RD) and cross direction (CD) associated with improved resistance to tensile stress for the crystallite phase stability and good strength-ductility balance. This is due to the better degree of core/shell-TrFE-CTFE nanofiber alignment and the crystalline/amorphous ratio. The coupling between terpolymer P(VDF-TrFE-CTFE) and copolymer P(VDF-TrFE) is responsible for phase stabilization, comparing the core/shell-TrFE/CTFE with the pristine terpolymer. Moreover, an impressive collective deformation mechanism of a two-length scale in the core/shell composite structure is found. We apply in-situ synchrotron X-ray to resolve the two-length scale simultaneously by using the small-angle X-ray scattering to characterize the nanofibers and the wide-angle X-ray diffraction to identify the phase transformations. Our findings may serve as guidelines for the fabrication of the electrospun nanofibers used as membranes-based electroactive polymers.

Designing positive electrodes based on 3D hierarchical CoMn2O4@NiMn-LDH nanoarray composites for high energy and power density supercapacitors

CrystEngComm ◽  
2020 ◽  
Vol 22 (41) ◽  
pp. 6864-6875
Author(s):  
Suci Meng ◽  
Yintao Wang ◽  
Yuqi Zhang ◽  
Qing Xu ◽  
Deli Jiang ◽  
...  
Keyword(s):  
Power Density ◽  
High Energy ◽  
Nanowire Arrays ◽  
Core Shell ◽  
Positive Electrodes ◽  
Energy And Power Density

3D hierarchical CoMn2O4@NiMn-LDH core–shell nanowire arrays as positive electrodes for high energy and power density supercapacitors.

Core-Shell Magnesium Hydroxide/Polymermer Nanoparticles Prepared by In Situ Emulsion Copolymerization

2011 ◽  
Vol 233-235 ◽  
pp. 2125-2128
Author(s):  
Li Li Xu ◽  
Sheng Peng Liu ◽  
Xuan Li
Keyword(s):  
Magnesium Hydroxide ◽  
Chemical Structure ◽  
Hybrid Nanoparticles ◽  
Core Shell ◽  
Polymer Shell ◽  
Emulsion Copolymerization ◽  
The Core ◽  
Polymer Hybrid ◽  
Transmission Electron

In this paper, vinylated magnesium hydroxide (MH) nanosheets were prepared with 3-(trimethoxysilyl) propyl methacrylate (γ-MPS) and pristine MH nanosheets, then the MH/polymer hybrid nanoparticles were prepared by in-situ emulsion copolymerization of vinylated MH nanosheets and styrene (St) monomer and styrene/butyl acrylate (St/BA) comonomer. The morphology, thermal stability and chemical structure of the final products were investigated in detail with transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Fourier-transform infrared spectra (FTIR). The TEM results showed that the core-shell structure of MH/Polymer nanoparticles with MH-cores and Polymer-shell was formed.

Synthesis and microstructure of conformal coatings on particulates

1997 ◽  
Vol 501 ◽  
Author(s):  
K. Rajan ◽  
P. Sajgalik ◽  
R. K. Singh ◽  
D. Kumar ◽  
J. Fitz-Gerald
Keyword(s):  
The Other ◽  
Core Shell ◽  
The Core ◽  
Crystallographic Characteristic ◽  
Synthesis Strategy ◽  
Conformal Coatings ◽  
Interface Structures ◽  
Individual Particles ◽  
Outer Coating

ABSTRACTIn this paper we present an overview of two very different approaches to the synthesis of composite particulates which result in a “core-shell” type structure. It is shown that both these synthesis approaches result in very characteristic interface structures between the outer coating and the host particles. One synthesis strategy is to use laser ablation deposition on individual particles and the other is to “coat” particles ‘in-situ’ by taking advantage of solid state diffusional transformations. Examination of the interface between the outer shell and the core of the particle shows that textured or toptactical growth occurs and it is suggested that this unique crystallographic characteristic may be responsible for the properties offered by these engineered particulates. The applications of such engineered particulates is also discussed.

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