Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 87: Metal Substrates: Structure, Epitaxy and Growth

O 87.6: Vortrag

Donnerstag, 23. März 2017, 12:00–12:15, WIL C307

Metallic Nanopore Arrays as Ideally Nanostructured Electrode for Supercapacitors — •Huaping Zhao, Ranjith Vellacheri, Min Zhou, Yang Xu, and Yong Lei — Institut für Physik & IMN MacroNano* (ZIK), Technische Universität Ilmenau, Ilmenau, Germany

Supercapacitors have attracted great interest as an electrical energy storage system because of their high power density, fast charge-discharge rate, and excellent cycle stability. Besides the active materials themselves, the electrode structure also plays an important role in determining the charge storage capability and rate capability of supercapacitors. Considering that the energy storage of supercapacitors is through either ionic adsorption-desorption or fast and reversible surface redox reactions at the electrode/electrolyte interface, a promising supercapacitor electrode should have large specific area to realize high charge storage capability. Meanwhile, it should provide shorter ion diffusion path and lower electron transfer resistance that enable the achievement of high rate capability. Here, we demonstrate metallic nanopore arrays fabricated using a two-step replication process from porous anodic alumina membrane as an ideally nanostructured electrode for supercapacitors. With metallic nanopore arrays as supercapacitor electrode, the large specific surface area could ensure high capacitance, while the highly oriented and stable nanoporous structure can facilitate ion transport, thus high charge storage capability and high rate capability of supercapacitor were achieved simultaneously.