Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE), Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an 710072, P. R. China.
Institute of Advanced Materials (IAM), Key Laboratory of Flexible Electronics (KLOFE), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, P. R. China.
Nano Lett. 2021 Nov 24;21(22):9651-9660. doi: 10.1021/acs.nanolett.1c03455. Epub 2021 Nov 12.
Flexible aqueous zinc-ion batteries (ZIBs) are considered as promising energy storage devices for wearable electronics due to their cost-effectiveness, environmental friendliness, and high theoretical energy density. Herein, a flexible fiber-shaped aqueous ZIB is demonstrated by using a self-assembled CoO nanosheet array on a carbon nanotube fiber as the cathode and Zn nanosheets deposited on a carbon nanotube fiber as the anode. The cycle life span of the fiber-shaped battery is largely enhanced by a simple electrolyte dynamics engineering strategy of preadding a trace amount of Co cations in the mild aqueous electrolyte. The assembled fiber-shaped ZIB shows a high specific capacity (158.70 mAh g at 1 A g), superior rate capacity, and excellent cycling life span (97.27% capacity retention after 10,000 cycles). Additionally, the fiber-shaped ZIB also shows superior flexibility, which can charge a smart watch under deformed states. This work provides new opportunities for the development of flexible, safe, and high-performance energy storage devices for wearable electronics.
柔性水系锌离子电池（ZIBs）由于其成本效益、环境友好性和高理论能量密度，被认为是用于可穿戴电子设备的有前途的储能装置。本文通过使用自组装的 CoO 纳米片阵列作为正极和沉积在碳纳米管纤维上的 Zn 纳米片作为负极，展示了一种柔性纤维状水系 ZIB。通过在温和的水系电解液中预先添加少量 Co 阳离子的简单电解液动力学工程策略，大大提高了纤维状电池的循环寿命。组装好的纤维状 ZIB 具有高比容量（在 1 A g 时为 158.70 mAh g）、优异的倍率性能和出色的循环寿命（在 10000 次循环后容量保持率为 97.27%）。此外，纤维状 ZIB 还具有出色的柔韧性，可在变形状态下为智能手表充电。这项工作为可穿戴电子设备的柔性、安全和高性能储能装置的发展提供了新的机会。
