Moisture-enabled self-charging and voltage stabilizing supercapacitor

Lifeng Wang, Haiyan Wang, Chunxiao Wu, Jiaxin Bai, Tiancheng He, Yan Li (), Huhu Cheng () and Liangti Qu ()
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Lifeng Wang: University of Science and Technology Beijing
Haiyan Wang: Tsinghua University
Chunxiao Wu: University of Science and Technology Beijing
Jiaxin Bai: Tsinghua University
Tiancheng He: Tsinghua University
Yan Li: University of Science and Technology Beijing
Huhu Cheng: Tsinghua University
Liangti Qu: Tsinghua University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Supercapacitor is highly demanded in emerging portable electronics, however, which faces frequent charging and inevitable rapid self-discharging of huge inconvenient. Here, we present a flexible moisture-powered supercapacitor (mp-SC) that capable of spontaneously moisture-enabled self-charging and persistently voltage stabilizing. Based on the synergy effect of moisture-induced ions diffusion of inner polyelectrolyte-based moist-electric generator and charges storage ability of inner graphene electrochemical capacitor, this mp-SC demonstrates the self-charged high areal capacitance of 138.3 mF cm−2 and ~96.6% voltage maintenance for 120 h. In addition, a large-scale flexible device of 72 mp-SC units connected in series achieves a self-charged 60 V voltage in air, efficiently powering various commercial electronics in practical applications. This work will provide insight into the design self-powered and ultra-long term stable supercapacitors and other energy storage devices.

Date: 2024
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DOI: 10.1038/s41467-024-49393-9

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