Three-dimensional core-shell structure of CoMn2O4@Ni‐Co‐S nanowires grown on nickel foam as binder free battery-type electrode

2019 ◽  
Vol 313 ◽  
pp. 161-170 ◽  
Author(s):  
Zhouhao Fu ◽  
Hanwei He
Keyword(s):  
Shell Structure ◽  
Nickel Foam ◽  
Three Dimensional ◽  
Core Shell ◽  
Binder Free ◽  
Core Shell Structure

scholarly journals Low-Diffusion Fricke Gel Dosimeters with Core-Shell Structure Based on Spatial Confinement

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3932
Author(s):  
Wei Zhang ◽  
Kaikai Wang ◽  
Yufeng Zeng ◽  
Xiaodan Hu ◽  
Xiaohong Zhang ◽  
...  
Keyword(s):  
Shell Structure ◽  
Three Dimensional ◽  
Field Size ◽  
Core Shell ◽  
Dose Verification ◽  
Ion Diffusion ◽  
Spatial Confinement ◽  
The Core ◽  
Important Challenge ◽  
Core Shell Structure

The diffusion of ferric ions is an important challenge to limit the application of Fricke gel dosimeters in accurate three-dimensional dose verification of modern radiotherapy. In this work, low-diffusion Fricke gel dosimeters, with a core-shell structure based on spatial confinement, were constructed by utilizing microdroplet ultrarapid freezing and coating technology. Polydimethylsiloxane (PDMS), with its excellent hydrophobicity, was coated on the surface of the pellets. The concentration gradient of the ferric ion was realized through shielding half of a Co-60 photon beam field size, and ion diffusion was measured by both ultraviolet-visible spectrophotometry and magnetic resonance imaging. No diffusion occurred between the core-shell pellets, even at 96 h after irradiation, and the diffusion length at the irradiation boundary was limited to the diameter (2–3 mm) of the pellets. Furthermore, Monte Carlo calculations were conducted to study dosimetric properties of the core-shell dosimeter, which indicated that a PDMS shell hardly affected the performance of the dosimeter.

A hierarchical glucose-intercalated NiMn-G-LDH@NiCo2S4 core–shell structure as a binder-free electrode for flexible all-solid-state asymmetric supercapacitors

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1852-1863 ◽  
Author(s):  
Shixia Chen ◽  
Chengxi Lu ◽  
Lu Liu ◽  
Mai Xu ◽  
Jun Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Shell Structure ◽  
High Energy ◽  
High Energy Density ◽  
Core Shell ◽  
Wearable Electronics ◽  
Asymmetric Supercapacitors ◽  
Binder Free ◽  
Core Shell Structure

Flexible, lightweight, and high-energy-density asymmetric supercapacitors (ASCs) are highly attractive for portable and wearable electronics.

scholarly journals Hydrothermal Synthesis of Co3O4/ZnCo2O4 Core-Shell Nanostructures for High-Performance Supercapacitors

2021 ◽  
Author(s):  
En-Syuan Lin ◽  
Feng-Sheng Chao ◽  
Chen-Jui Liang ◽  
Chi-Jung Chang ◽  
Alex Fang ◽  
...  
Keyword(s):  
Shell Structure ◽  
High Performance ◽  
Nickel Foam ◽  
Core Shell ◽  
Electrochemical Performances ◽  
Active Materials ◽  
Structural Support ◽  
Shell Nanostructures ◽  
Core Shell Structure ◽  
Co3o4 Nanorods

Abstract Supercapacitive properties of Co/ZnCo oxide composite with a core-shell nanostructure (Co3O4/ZnCo2O4) prepared directly onto a nickel foam substrate by a two-step hydrothermal method were investigated. The synthesized core-shell structure consisted of some ~40-100 nm in thick flaky ZnCo2O4 deposits coated onto the surface of Co3O4 nanorods measuring ~150 nm in diameter. The specific capacitance value of the Co3O4/ZnCo2O4 core-shell nanostructure synthesized by hydrothermal at 130°C for a ZnCo2O4 deposition time of 2 h can attain 1804 F/g at a scan rate of 5 mV/s. Furthermore, the core-shell structured electrode still exhibited a relatively good capacitance retention of more than 93% after 3000 CV cycles due to the superior structural support of Co3O4 scaffolds. The Co3O4/ZnCo2O4 core-shell structure exhibits excellent electrochemical performances and, as such, is one of the more promising active materials in pseudocapacitor applications.

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