| Issue |
EPL
Volume 141, Number 3, February 2023
|
|
|---|---|---|
| Article Number | 36003 | |
| Number of page(s) | 5 | |
| Section | Condensed matter and materials physics | |
| DOI | https://doi.org/10.1209/0295-5075/acb2f5 | |
| 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: mikio.fukuhara.b2@tohoku.ac.jp (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.
© 2023 EPLA
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