SKM 2023 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MM: Fachverband Metall- und Materialphysik

MM 23: Poster II

MM 23.26: Poster

Dienstag, 28. März 2023, 18:15–20:00, P2/OG1+2

Architecting Nanoscaffolds to Ward Off Agglomeration of Nanowire arrays: Achieving Reliable Length Retention — •Chengzhan Yan, Huaping Zhao, and Yong Lei — Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany.

Nanowire arrays with well-defined arrangements and high aspect ratios are of particular interest for energy storage systems. To this end, one prevailing strategy is to combine ordered porous templates with wet chemical techniques. However, nanowires with high aspect ratios have a more severe tendency to self-agglomerate because of uneven capillary forces, which leads to poor arrangement reliability and degrades the electrochemical performance. Herein, an ultra-thin honeycomb alumina nanoscaffold (HAN) is constructed to ensure the structural stability of nanowire arrays, achieving a four-fold increase in the aspect ratio over the restriction. Within the integrated architecture, each nickel nanowire is individually separated by HAN so that the capillary forces around the nanowire cancel each other out during drying. Moreover, MnO2 and polypyrrole are further electrodeposited on these free-standing nanowires to form a vertically aligned core-shell 1D nanostructure arrays as cathodes and anodes for assembling micro-supercapacitors (MSCs). Attributed to the high specific surface area and low charge diffusion resistance, the assembled MSCs attain remarkably improved energy density, rate performance and lifespan.