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Photo-Rechargeable Organic Supercapacitor via Light-Activated Electrolytes.

Shubhra Kanti Bhaumik¹, Sudipta Biswas¹, Nitzan Shauloff¹

¹Department of Chemistry, Ben Gurion University of the Negev, Beer Sheva, 8410501, Israel.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|April 25, 2025

Summary

This study introduces a novel photo-rechargeable supercapacitor using light-activated electrolytes. This innovation enables efficient light-induced energy storage and device recharging for various applications.

Keywords:

organic supercapacitors photoacids photoactive electrolytes photo‐rechargeable supercapacitors

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Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Light-mediated energy storage is crucial for photonic devices and solar energy harvesting.
Supercapacitors are vital energy storage devices, but efficient recharging methods are sought.

Purpose of the Study:

To demonstrate a photo-rechargeable supercapacitor using photoactive labile electrolytes.
To explore light-induced recharging mechanisms for enhanced energy storage.

Main Methods:

Constructed a supercapacitor with 2-nitrobenzaldehyde as the photoactive electrolyte.
Investigated the electrolyte's ionization and capacitance changes upon light irradiation.
Evaluated device performance for charging and powering external loads.

Main Results:

Light irradiation transformed 2-nitrobenzaldehyde into photoacids, significantly enhancing capacitance.
The photo-induced electrolyte generation was reversible, enabling multiple charge-discharge cycles.
The device showed high specific capacitance, good retention, and cyclic stability.

Conclusions:

Developed a novel photo-rechargeable supercapacitor concept based on photoactive electrolytes.
This technology offers a new pathway for photo-charged devices and solar energy storage.
The reversible nature of photo-induced electrolytes facilitates practical energy storage solutions.