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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

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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.
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Sodium-Doped Mesoporous Ni2P2O7 Hexagonal Tablets for High-Performance Flexible All-Solid-State Hybrid

Chengzhen Wei1, Cheng Cheng1, Shanshan Wang1

  • 1College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455002, Henan, P. R. China.

Chemistry, an Asian Journal
|June 6, 2015
PubMed
Summary

Researchers developed porous sodium-doped Ni2P2O7 hexagonal tablets using a simple hydrothermal and calcination method. These tablets show excellent performance as electrode materials for flexible solid-state hybrid supercapacitors.

Keywords:
electrochemistryenergy storagehydrothermal synthesismesoporous materialssolid-state structures

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Developing advanced electrode materials is crucial for high-performance supercapacitors.
  • Sodium-doped nickel pyrophosphate (Ni2P2O7) offers potential due to its electrochemical properties.

Purpose of the Study:

  • To synthesize porous sodium-doped Ni2P2O7 hexagonal tablets.
  • To evaluate their performance as electrode materials for supercapacitors, particularly flexible solid-state hybrid devices.

Main Methods:

  • A simple hydrothermal method was employed to create hexagonal tablet precursors.
  • Calcination was used to transform precursors into porous sodium-doped Ni2P2O7 hexagonal tablets.
  • Electrochemical measurements were conducted to assess capacitance and cycling stability.

Main Results:

  • The synthesized porous sodium-doped Ni2P2O7 hexagonal tablets achieved a specific capacitance of 557.7 F/g at 1.2 A/g.
  • Flexible solid-state hybrid supercapacitors were successfully constructed using these materials.
  • The devices demonstrated a high energy density of 23.4 Wh/kg and good cycling stability over 5000 cycles.

Conclusions:

  • Porous sodium-doped Ni2P2O7 hexagonal tablets are effective electrode materials for supercapacitors.
  • These materials are promising for the development of flexible solid-state hybrid supercapacitors with excellent performance and durability.