Ren Hehe, Zhang Xinyu, Liu Qun, Tang Weinan, Liang Jing, Wu Wei
Laboratory of Printable Functional Materials and Printed Electronics, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China.
Small. 2024 Jul;20(28):e2312207. doi: 10.1002/smll.202312207. Epub 2024 Feb 1.
The flexible aqueous rechargeable sodium-ion batteries (ARSIBs) are a promising portable energy storage system that can meet the flexibility and safety requirements of wearable electronic devices. However, it faces huge challenges in mechanical stability and facile manufacturing processes. Herein, the first fully-printed flexible ARSIBs with appealing mechanical performance by screen-printing technique is prepared, which utilizes NaV(PO)F/C (NVPF/C) as the cathode and 2% nitrogenous carbon-loaded NaMnTi(PO)/C (NMTP/C/NC) as the anode. In particular, the organic co-solvent ethylene glycol (EG) is cleverly added to 17 m (mol kg) NaClO electrolyte to prepare a 17 m NaClO-EG mixed electrolyte. This mixed electrolyte can withstand low temperatures of -20 °C in practical applications. Encouragingly, the fully-printed flexible ARSIBs (NMTP/C/NC//NVPF/C) exhibit a discharge capacity of 40.1 mAh g, an energy density of 40.1 Wh kg, and outstanding cycle performance. Moreover, these batteries with various shapes can be used as an energy wristband for an electronic watch in the bending states. The fully-printed flexible ARSIBs in this work are expected to shed light on the development of energy for wearable electronics.
柔性水系可充电钠离子电池（ARSIBs）是一种很有前景的便携式储能系统，能够满足可穿戴电子设备的灵活性和安全要求。然而，它在机械稳定性和简便制造工艺方面面临巨大挑战。在此，通过丝网印刷技术制备了首个具有吸引人的机械性能的全印刷柔性ARSIBs，其使用NaV(PO)F/C（NVPF/C）作为阴极，2%氮掺杂碳负载的NaMnTi(PO)/C（NMTP/C/NC）作为阳极。特别地，将有机共溶剂乙二醇（EG）巧妙地添加到17 m（mol kg）NaClO电解液中，制备出17 m NaClO-EG混合电解液。这种混合电解液在实际应用中能够承受-20°C的低温。令人鼓舞的是，全印刷柔性ARSIBs（NMTP/C/NC//NVPF/C）展现出40.1 mAh g的放电容量、40.1 Wh kg的能量密度以及出色的循环性能。此外，这些各种形状的电池在弯曲状态下可作为电子手表的能量腕带使用。这项工作中的全印刷柔性ARSIBs有望为可穿戴电子产品的能源发展提供启示。
