AlO₆ clusters' electric storage effect in amorphous alumina supercapacitors.

ABSTRACT: In this study, the electric storage effect of AlO₆ clusters in amorphous alumina (AAO) supercapacitors was investigated in terms of cluster morphologies under electron-beam irradiation. Based on first-principles density functional calculation, the optimised structure of AlO₆ clusters around an O-vacancy is characterised by a large vacant space created by the absence of an O atom and its neighbouring Al atom. The localised electrons present near the two-atomic vacancies induce positive charges on the inside of the insulating oxide surface, ensuring the adsorption of many electrons on the surface. Electron-beam irradiation (adsorption) from 100 to 180 keV causes the lengths of the Al-O bonds of the cluster to shrink, but then return to the original length with decreasin

SUBMITTER: Fukuhara M 

PROVIDER: S-EPMC7813864 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature