Wang Lifeng, Wang Haiyan, Wu Chunxiao, Bai Jiaxin, He Tiancheng, Li Yan, Cheng Huhu, Qu Liangti
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, PR China.
Key Laboratory of Organic Optoelectronics & Molecular Engineering, Ministry of Education, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Nat Commun. 2024 Jun 10;15(1):4929. doi: 10.1038/s41467-024-49393-9.
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 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.
超级电容器在新兴的便携式电子产品中需求旺盛，然而，它面临着频繁充电以及不可避免的快速自放电所带来的巨大不便。在此，我们展示了一种柔性湿气驱动超级电容器（mp-SC），它能够自发地实现基于湿气的自充电并持续稳定电压。基于内部基于聚电解质的湿电发电机中湿气诱导离子扩散与内部石墨烯电化学电容器电荷存储能力的协同效应，这种mp-SC展现出138.3 mF/cm的自充电高面积电容以及在120小时内约96.6%的电压维持率。此外，一个由72个mp-SC单元串联连接而成的大规模柔性装置在空气中实现了60 V的自充电电压，在实际应用中能有效地为各种商用电子产品供电。这项工作将为自供电且超长期稳定的超级电容器及其他储能装置的设计提供思路。
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