Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
Publication date: 18th December 2023
The high demand for portable electronic devices has enhanced the development of efficient, sustainable, and flexible self-charging power sources. [1, 2]. Recently, metal halide perovskites (MHPS) have been regarded as promising materials for energy harvesting and storage devices because of their excellent optoelectronic, ferro/piezoelectric, and migration properties. However, the toxicity and instability of MHPs hinder their practical applications. Herein, for the first time, the potential of methylammonium tin halide (MA2SnX6; X = Cl, Br, and I) double perovskite thin films for high-efficiency self-charging power units (SPUs) are explained because of their high stability in air.
In this work, the combination of a MA2SnCl6-based piezoelectric nanogenerator (PENG) with a lithium metal battery (LMB), which also uses a MA2SnCl6-based thin film as the cathode, is exhibited. [3] The MA2SnCl6-based PENG exhibited a high output power density of 7.33 μW cm−2 and excellent mechanical durability. Furthermore, MA2SnCl6 as a cathode in LMB recorded the highest specific capacity of 589.98 mAh g−1. The cycle retention has been improved from 16.9% to 75.1% after coating with 1 nm-thick Al2O3. The MA2SnCl6-based LMB is charged by the MA2SnCl6-based PENG and utilized as an SPU for operating various small-scale electronics (humidity meter, calculator, and LED). [4] This work demonstrates the impressive potential for self-charging power units and provides insights into the general design principles of MHP-based devices.
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