Photorechargeable Hybrid Halide Perovskite Supercapacitors

Area of Science:

• Materials Science
• Energy Storage
• Photochemistry

Background:

• Current off-grid power systems typically separate energy conversion and storage.
• Developing integrated devices for simultaneous energy harvesting and storage is crucial for efficient power solutions.

Purpose of the Study:

• To combine energy harvesting and storage into a single photoelectrochemical energy storage device.
• To report a halide perovskite-based photorechargeable supercapacitor with enhanced properties.

Main Methods:

• Fabrication of halide perovskite-based photorechargeable supercapacitors.
• Incorporation of carbon black into porous perovskite electrodes to enhance electronic conductivity.
• Characterization of device performance, including energy density, power density, and photocharging conversion efficiency.

Main Results:

• The developed device achieves an energy density of 30.71 W h kg⁻¹ and a power density of 1875 W kg⁻¹.
• A photocharging conversion efficiency (η) of approximately 0.02% and a photoenergy density of ~160 mW h kg⁻¹ were achieved under white light.
• Halide perovskites' semiconductor and ionic properties were leveraged, with carbon black improving electronic conductivity.

Conclusions:

• Halide perovskite-based photorechargeable supercapacitors offer a promising integrated solution for off-grid power.
• The study highlights the potential of optimizing perovskite properties for efficient light energy harvesting and storage.
• Further analysis of working principles, stability, and limitations paves the way for future advancements.