A polyoxovanadate as an advanced electrode material for supercapacitors

Han Yi Chen; Grace Wee; Rami Al-Oweini; Jochen Friedl; Kim Soon Tan; Yuxi Wang; Chui Ling Wong; Ulrich Kortz; Ulrich Stimming; Madhavi Srinivasan

doi:10.1002/cphc.201400091

A polyoxovanadate as an advanced electrode material for supercapacitors

Han Yi Chen, Grace Wee, Rami Al-Oweini, Jochen Friedl, Kim Soon Tan, Yuxi Wang, Chui Ling Wong, Ulrich Kortz, Ulrich Stimming, Madhavi Srinivasan

Department of Physics

Research output: Contribution to journal › Article › peer-review

72 Scopus citations

Abstract

Polyoxovanadate Na₆V₁₀O₂₈ is investigated for the first time as electrode material for supercapacitors (SCs). The electrochemical properties of Na₆V₁₀O₂₈ electrodes are studied in Li⁺-containing organic electrolyte (1M LiClO₄ in propylene carbonate) by galvanostatic charge/discharge and cyclic voltammetry in a three-electrode configuration. Na₆V ₁₀O₂₈ electrodes exhibit high specific capacitances of up to 354 Fg^-1. An asymmetric SC with activated carbon as positive electrode and Na₆V₁₀O₂₈ as negative electrode is fabricated and exhibits a high energy density of 73 Whkg^-1 with a power density of 312 Wkg^-1, which successfully demonstrates that Na₆V₁₀O₂₈ is a promising electrode material for high-energy SC applications.

Original language	English
Pages (from-to)	2162-2169
Number of pages	8
Journal	ChemPhysChem
Volume	15
Issue number	10
DOIs	https://doi.org/10.1002/cphc.201400091
State	Published - 21 Jul 2014

Keywords

electrochemistry
materials science
polyoxometalates
redox chemistry
supercapacitors

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title = "A polyoxovanadate as an advanced electrode material for supercapacitors",

abstract = "Polyoxovanadate Na6V10O28 is investigated for the first time as electrode material for supercapacitors (SCs). The electrochemical properties of Na6V10O28 electrodes are studied in Li+-containing organic electrolyte (1M LiClO4 in propylene carbonate) by galvanostatic charge/discharge and cyclic voltammetry in a three-electrode configuration. Na6V 10O28 electrodes exhibit high specific capacitances of up to 354 Fg-1. An asymmetric SC with activated carbon as positive electrode and Na6V10O28 as negative electrode is fabricated and exhibits a high energy density of 73 Whkg-1 with a power density of 312 Wkg-1, which successfully demonstrates that Na6V10O28 is a promising electrode material for high-energy SC applications.",

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author = "Chen, {Han Yi} and Grace Wee and Rami Al-Oweini and Jochen Friedl and Tan, {Kim Soon} and Yuxi Wang and Wong, {Chui Ling} and Ulrich Kortz and Ulrich Stimming and Madhavi Srinivasan",

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AU - Chen, Han Yi

AU - Wee, Grace

AU - Al-Oweini, Rami

AU - Friedl, Jochen

AU - Tan, Kim Soon

AU - Wang, Yuxi

AU - Wong, Chui Ling

AU - Kortz, Ulrich

AU - Stimming, Ulrich

AU - Srinivasan, Madhavi

PY - 2014/7/21

Y1 - 2014/7/21

N2 - Polyoxovanadate Na6V10O28 is investigated for the first time as electrode material for supercapacitors (SCs). The electrochemical properties of Na6V10O28 electrodes are studied in Li+-containing organic electrolyte (1M LiClO4 in propylene carbonate) by galvanostatic charge/discharge and cyclic voltammetry in a three-electrode configuration. Na6V 10O28 electrodes exhibit high specific capacitances of up to 354 Fg-1. An asymmetric SC with activated carbon as positive electrode and Na6V10O28 as negative electrode is fabricated and exhibits a high energy density of 73 Whkg-1 with a power density of 312 Wkg-1, which successfully demonstrates that Na6V10O28 is a promising electrode material for high-energy SC applications.

AB - Polyoxovanadate Na6V10O28 is investigated for the first time as electrode material for supercapacitors (SCs). The electrochemical properties of Na6V10O28 electrodes are studied in Li+-containing organic electrolyte (1M LiClO4 in propylene carbonate) by galvanostatic charge/discharge and cyclic voltammetry in a three-electrode configuration. Na6V 10O28 electrodes exhibit high specific capacitances of up to 354 Fg-1. An asymmetric SC with activated carbon as positive electrode and Na6V10O28 as negative electrode is fabricated and exhibits a high energy density of 73 Whkg-1 with a power density of 312 Wkg-1, which successfully demonstrates that Na6V10O28 is a promising electrode material for high-energy SC applications.

KW - electrochemistry

KW - materials science

KW - polyoxometalates

KW - redox chemistry

KW - supercapacitors

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A polyoxovanadate as an advanced electrode material for supercapacitors

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Keywords

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