Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 56: New materials and concepts

HL 56.2: Talk

Friday, March 16, 2018, 11:30–11:45, EW 202

Nanoporous Alumina Membranes as Promising Platforms for Rationally Designing Supercapacitor Electrodes — •Huaping Zhao, Long Liu, Yaoguo Fang, and Yong Lei — Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau, 98693, Ilmenau, Germany

Supercapacitors present growing significance as the advanced energy storage devices to bridge the gap between batteries and conventional capacitors owing to the high power density, the fast charge-discharge rate, and the excellent cycle stability. In addition to the electroactive materials themselves, the design of electrode architectures also plays an important role in determining the charge storage capability and rate capability of supercapacitors. A promising supercapacitor electrode therefore should have larger specific area to realize high charge storage capability meanwhile should provide shorter ion diffusion path and lower electron transfer resistance to enable the achievement of high rate capability. Here, we demonstrate nanoporous alumina membranes as promising platforms for rationally designing supercapacitor nanoelectrodes. By employing nanoporous alumina membranes as nanostructuring templates, supercapacitor electrodes in the forms of arrayed nanorod, nanotube, and nanopore have been designed and fabricated. These as-prepared supercapacitor electrodes have large specific surface area ensuring high capacitance and highly-oriented structure facilitating ion transport, thus high charge storage capability and high rate capability of supercapacitor were achieved simultaneously.