Bioactive Ion-Based Switchable Supercapacitors.
Angew Chem Int Ed Engl
; 61(50): e202212250, 2022 12 12.
Article
en En
| MEDLINE
| ID: mdl-36260635
ABSTRACT
Switchable supercapacitors (SCs) enable a reversible electrically-driven uptake/release of bioactive ions by polarizing porous carbon electrodes. Herein we demonstrate the first example of a bioactive ion-based switchable supercapacitor. Based on choline chloride and porous carbons we unravel the mechanism of physisorption vs. electrosorption by nuclear magnetic resonance, Raman, and impedance spectroscopy. Weak physisorption facilitates electrically-driven electrolyte depletion enabling the controllable uptake/release of electrolyte ions. A new 4-terminal device is proposed, with a main capacitor and a detective capacitor for monitoring bioactive ion adsorption in situ. Ion-concentration control in printed choline-based switchable SCs realizes switching down to 8.3 % residual capacitance. The exploration of adsorption mechanisms in printable microdevices will open an avenue of manipulating bioactive ions for the application of drug delivery, neuromodulation, or neuromorphic devices.
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1
Banco de datos:
MEDLINE
Asunto principal:
Carbono
/
Electrólitos
Idioma:
En
Año:
2022
Tipo del documento:
Article