Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7736909 | Journal of Power Sources | 2014 | 5 Pages |
Abstract
NiO nanoparticles of 70, 91 and 107 nm average diameter are synthesized by cathodic contact glow discharge electrolysis at 30, 36 and 42 VDC respectively, in 2 M H2SO4 + 0.5 M ethanol + 2.5 mg mlâ1 of PVP, and are investigated for electrochemical energy storage. From the cyclic voltammetry and galvanostatic charge-discharge measurements in 1 M KOH, it was found that a maximum specific capacitance of 218 F gâ1 is achieved with the 70 nm NiO nanoparticles at 2.7 A gâ1. Larger nanoparticles of 91 and 107 nm diameter exhibit specific capacitances of 106 and 63 F gâ1, respectively, suggesting a size-dependent capacitive performance enhanced with decreasing particles size.
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Authors
Anis Allagui, Abdul Hai Alami, Elena A. Baranova, Rolf Wüthrich,