Volume 141, Number 3, February 2023
|Number of page(s)||5|
|Section||Condensed matter and materials physics|
|Published online||24 January 2023|
Amorphous alumina supercapacitors with voltage-charging performance
1 New Industry Creation Hatchery Center, Tohoku University - Sendai 980-8579, Japan
2 Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University Sendai 980-8579, Japan
3 Alumi-Oken - Kyoto, 607-8155, Japan
4 Faculty of Engineering, Shizuoka University - Hamamatsu, 432-8561, Japan
(a) E-mail: firstname.lastname@example.org (corresponding author)
Received: 29 October 2022
Accepted: 13 January 2023
The electric storage effect of fast charging by voltage application for amorphous alumina (cAAO) supercapacitors fabricated using a crystalline aluminum alloy was investigated in terms of charging/discharging behaviors and AC impedance. The mechanism for the electrical storage of a cAAO supercapacitor was proposed based on the coupling of electrons on Al atoms and positively charged holes in Al vacancies, using an electric double-layer model containing an electrolyte with an electrical resistivity of 6.3 × 105Ωcm. The supercapacitor demonstrated fast charging at a voltage application of up to 500 V.
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