Issue 29, 2024

Low-temperature suitability of flexible photo-rechargeable devices integrated with hydrogel-based lithium-ion batteries and perovskite solar cells

Abstract

Photo-rechargeable devices are viable alternatives for low power consumption and mini-type wearable power systems, but their flexibility, safety, and low-temperature suitability should be considered. Here, we present a flexible photo-rechargeable device for multi-scenario applications in energy harvesting and storage. As an energy-storage unit, the optimized HE-LIB is constructed using a low water content (5.5 wt%) hydrogel film, which exhibits good cycling stability, low-temperature suitability, and normal operation even under different deformation conditions. The flexible perovskite solar cell (f-PSC) as an energy-harvesting unit has a typical high photoelectric conversion efficiency of 21.48%. By the voltage matching strategy, direct connection of the f-PSC unit and HE-LIB unit can eliminate the energy loss in the control circuit, resulting in an overall energy efficiency (OEE) of up to 12.88%, which is one of the highest OEE values obtained for flexible photo-rechargeable devices to date. Furthermore, our study confirms that this type of flexible photo-rechargeable device can protect LIB units from overcharging even after a long-duration photo-charging process, as well as normally harvest and store energy at −20 °C. This work provides a practicable strategy to construct flexible photo-rechargeable devices with high OEE, safety, and low-temperature suitability for smart wearable electronics.

Graphical abstract: Low-temperature suitability of flexible photo-rechargeable devices integrated with hydrogel-based lithium-ion batteries and perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
03 May 2024
Accepted
17 Jun 2024
First published
17 Jun 2024

J. Mater. Chem. A, 2024,12, 18214-18223

Low-temperature suitability of flexible photo-rechargeable devices integrated with hydrogel-based lithium-ion batteries and perovskite solar cells

W. Liu, M. He, H. Lu, H. Zhong, Z. Cai, S. Wu, Y. Tan, X. Liu and Y. Mai, J. Mater. Chem. A, 2024, 12, 18214 DOI: 10.1039/D4TA03076A

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