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A polyoxovanadate as an advanced electrode material for supercapacitors.

Han-Yi Chen1, Grace Wee, Rami Al-Oweini

  • 1TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore (Singapore); School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore (Singapore).

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|May 13, 2014
PubMed
Summary

Polyoxovanadate Na(6)V(10)O(28) shows promise as a novel electrode material for supercapacitors (SCs). This material achieves high specific capacitances and energy densities, indicating potential for advanced energy storage solutions.

Keywords:
electrochemistrymaterials sciencepolyoxometalatesredox chemistrysupercapacitors

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Supercapacitors (SCs) are crucial for energy storage.
  • Developing novel electrode materials is key to enhancing SC performance.
  • Polyoxovanadates offer unique electrochemical properties.

Purpose of the Study:

  • To investigate Na(6)V(10)O(28) as a potential electrode material for SCs.
  • To evaluate the electrochemical performance of Na(6)V(10)O(28) in an organic electrolyte.
  • To demonstrate the viability of Na(6)V(10)O(28) in an asymmetric SC configuration.

Main Methods:

  • Electrochemical characterization using galvanostatic charge/discharge and cyclic voltammetry.
  • Testing in a three-electrode setup with 1 M LiClO(4) in propylene carbonate electrolyte.
  • Fabrication and testing of an asymmetric SC using Na(6)V(10)O(28) as the negative electrode.

Main Results:

  • Na(6)V(10)O(28) electrodes achieved high specific capacitances up to 354 F g(-1).
  • An asymmetric SC demonstrated a high energy density of 73 Wh kg(-1) and power density of 312 W kg(-1).
  • The material exhibited excellent electrochemical properties for SC applications.

Conclusions:

  • Na(6)V(10)O(28) is a promising new material for high-energy supercapacitors.
  • Its high capacitance and energy density support its use in advanced energy storage.
  • Further research into polyoxovanadates could lead to improved SC technologies.