Novel portable power sources featuring high flexibility, built-in sustainability and enhanced safety have attracted ever-increasing attention in the field of wearable electronics. Herein, a novel flexible self-charging sodium-ion full battery was feasibly fabricated by sandwiching a BaTiO₃-P(VDF-HFP)-NaClO₄ piezoelectric gel-electrolyte film between an advanced Na₃V₂(PO₄)₃@C cathode and hard carbon anode. Besides the considerable flexibility and electrochemical storage performance, the as-designed device also delivers sound self-charging capability via various stress patterns, regardless of whether under static compression, repeated bending or continuous palm patting. Serially connected self-charging devices are able to drive several electronic devices with a good working state. Specifically, a unique theory of electromagnetic fields was successfully introduced to deduce the direct self-charging mechanism, where no rectifier was applied and the battery was charged by the built-in piezoelectric component. This work presents an innovative approach to achieve a new sustainable, safe and flexible sodium-ion battery for self-powered wearable electronics.

中文翻译：

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用于自供电可穿戴电子设备的灵活的自充电钠离子充满电池

具有高灵活性，内置可持续性和增强安全性的新型便携式电源已在可穿戴电子领域引起了越来越多的关注。本文中，通过将BaTiO ₃ -P（VDF-HFP）-NaClO ₄压电凝胶-电解质膜夹在先进的Na ₃ V ₂（PO ₄）₃ @C之间，来制造新颖的柔性自充电钠离子充满电池阴极和硬碳阳极。除了相当大的灵活性和电化学存储的性能，如设计的装置还提供了声音自充电能力通过各种应力模式，无论是在静态压缩，反复弯曲还是连续掌拍下。串行连接的自充电设备能够以良好的工作状态驱动多个电子设备。具体而言，成功引入了独特的电磁场理论来推导直接自充电机制，该机制不使用整流器，而是通过内置的压电元件为电池充电。这项工作提出了一种创新方法，以实现用于自供电可穿戴电子设备的新型可持续，安全和灵活的钠离子电池。