Ag nanowires and its application as electrode materials in electrochemical capacitor
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Silver nanowires were synthesized on a large scale by using anodic aluminum oxide (AAO) film as templates and serving ethylene glycol as reductant. Their morphological and structural characterizations were characterized with field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and selected area electron diffraction (SAED). The electrochemical properties of silver nanowires as electrode materials for electrochemical capacitors were investigated by cyclic voltammetry (CV) and galvanostatic charge/discharge technique in 6 M KOH aqueous electrolyte. The Ag2O/Ag coaxial nanowires were formed by the incomplete electrochemical oxidation during the charge step. The maximum specific capacitance of 987 F g−1 was obtained at a charge–discharge current density of 5 mA cm−2.
KeywordsAg nanowire Anodic aluminum oxide film Electrochemical capacitor Specific capacitance
We gratefully acknowledge the support of this work by Natural Science Funds in Gansu Science and Technology Committee (0803RJ2A005) and postgraduate advisor program of Provincial Education Department of Gansu.