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Capacitor With A Dielectric01:18

Capacitor With A Dielectric

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Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
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Multi-component carbon-based composites containing high crystallinity NiBDC as high-performance electrodes for

Mei Han1, Jingce Bi1, Ningning Liu2

  • 1Department of Chemistry, College of Science, Northeastern University, Shenyang, 110819, P. R. China. hanyide@mail.neu.edu.cn.

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|September 27, 2023
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We developed a novel carbon-based composite (C-Ni/NiO/NiBDC) for high-performance supercapacitors. This material offers superior capacitance across a wide potential range due to its unique structure and synergistic effects.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Supercapacitors require advanced electrode materials for enhanced energy storage.
  • Developing multi-component composites with synergistic effects is crucial for improving performance.

Purpose of the Study:

  • To synthesize a novel multi-component carbon-based composite (C-Ni/NiO/NiBDC) with high crystallinity.
  • To evaluate the supercapacitor performance of the C-Ni/NiO/NiBDC composite as both positive and negative electrode materials.

Main Methods:

  • In situ sol-gel hydrothermal growth combined with annealing treatment.
  • Preparation of multi-component carbon-based composites featuring NiBDC, Ni, and NiO.
  • Fabrication and electrochemical testing of supercapacitors using the synthesized composite.

Main Results:

  • Achieved high crystallinity of NiBDC within the carbon-based composite.
  • Demonstrated superior capacitance performance over a wide potential range (0-1.8 V).
  • Observed synergistic effects between NiBDC, Ni, and NiO, enhanced by intimate interfacial contact.

Conclusions:

  • The proposed synthesis strategy effectively produces high-crystallinity C-Ni/NiO/NiBDC composites.
  • The C-Ni/NiO/NiBDC composite exhibits excellent supercapacitor performance due to synergistic effects and high crystallinity.
  • This material shows promise for advanced energy storage applications.