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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

773
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
773

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Few-layer V2C/MWCNT with high ionic accessibility for lithium-ion storage.

Shouchao Fu1, Xunpeng Zhang1, Bingxian Wu1

  • 1Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, People's Republic of China. gaohong65cn@126.com.

Dalton Transactions (Cambridge, England : 2003)
|April 3, 2024
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Summary
This summary is machine-generated.

Few-layer V2C MXene combined with carbon nanotubes significantly enhances lithium-ion battery performance. This novel f-V2C/MWCNT material offers improved ionic accessibility and stability for advanced energy storage.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Vanadium carbide (V2C) MXene exhibits high theoretical capacity for lithium-ion batteries.
  • Stacked multilayer V2C structures suffer from poor ionic accessibility and cycling stability.

Purpose of the Study:

  • To synthesize few-layer V2C (f-V2C) and integrate it with multi-walled carbon nanotubes (MWCNTs).
  • To improve ionic accessibility, specific surface area, and structural stability of V2C for enhanced Li+ storage.

Main Methods:

  • Synthesis of few-layer V2C (f-V2C) material.
  • Composite formation of f-V2C with multi-walled carbon nanotubes (MWCNTs).
  • Electrochemical testing of the f-V2C/MWCNT composite in lithium-ion battery applications.

Main Results:

  • The f-V2C/MWCNT composite demonstrates abundant pores, enhancing Li+ ion accessibility.
  • MWCNTs improve specific surface area, reduce charge transfer resistance, and increase structural stability.
  • Achieved a specific capacity of 531 mA h g-1 at 0.1 A g-1 after 100 cycles, and 166 mA h g-1 at 5.0 A g-1.
  • Exhibited excellent cycling stability with 95% capacity retention after 1000 cycles at 5.0 A g-1.

Conclusions:

  • The f-V2C/MWCNT composite shows significant potential for high-performance lithium-ion battery applications.
  • The enhanced ionic accessibility and structural integrity are key to the superior electrochemical performance.
  • This material offers a promising pathway for advanced Li+ storage solutions.