超级电容器
水分
电压
材料科学
环境科学
纳米技术
化学
电极
电容
电气工程
复合材料
工程类
物理化学
作者
Lifeng Wang,Haiyan Wang,Chunxiao Wu,Jiaxin Bai,Tiancheng He,Yan Li,Huhu Cheng,Liangti Qu
标识
DOI:10.1038/s41467-024-49393-9
摘要
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.
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