The poor electrochemical stabilities of aqueous zinc-ion batteries (AZIBs) are mainly related to the uncontrollable dendrite growth, hydrogen evolution, and side reactions. Here, a commercial cotton towel (CT) is directly developed as a separator of AZIBs to mitigate these problems. This CT separator effectively buffers the hydrogen evolution and side reactions to enhance the reversibility of a Zn anode. Additionally, the strong coordination between the hydroxyl group in the CT separator and Zn²⁺ significantly constrains two-dimensional surface diffusion of Zn atom and increases nucleation sites, further regulating uniform Zn deposition, which effectively cushions Zn dendrite formation. Accordingly, the symmetric cell equipped with the CT separator displays an ultralong lifespan of over 1200 h at 1 mA cm^–2 for 0.5 mAh cm^–2 and 700 h at 2 mA cm^–2 for 4 mAh cm^–2. Notably, the CT separator significantly boosts the cyclability of a MnO₂ full cell at 1 A g^–1 (96.9 mAh g^–1 after 2400 cycles). A flexible soft-packaged cell consisting of CT enables an impressive electrochemical performance. Such a high-performance separator with attractive cost effectiveness provides a potential prospect for large-scale applications of AZIBs in electrochemical energy storage devices and wearable electronics.

中文翻译：

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用于水系锌离子电池的棉毛巾分离器稳定锌阳极

水系锌离子电池（AZIBs）较差的电化学稳定性主要与不可控的枝晶生长、析氢和副反应有关。在这里，直接开发了一种商用棉毛巾 (CT) 作为 AZIB 的分离器，以缓解这些问题。这种 CT 隔板有效地缓冲析氢和副反应，以提高锌阳极的可逆性。此外，CT隔膜中的羟基与Zn ²⁺之间的强配位显着限制了Zn原子的二维表面扩散并增加了成核位点，进一步调节了Zn的均匀沉积，有效地缓冲了Zn枝晶的形成。因此，配备 CT 隔膜的对称电池在 1 mA cm 下显示出超过 1200 小时的超长寿命^–2用于 0.5 mAh cm ^–2和 700 h 在 2 mA cm ^–2用于 4 mAh cm ^–2。值得注意的是，CT 隔板显着提高了 MnO ₂全电池在 1 A g ^–1下的可循环性（ 2400 次循环后为96.9 mAh g ^{–1 ）。}由 CT 组成的柔性软封装电池具有令人印象深刻的电化学性能。这种具有有吸引力的成本效益的高性能隔膜为AZIBs在电化学储能设备和可穿戴电子设备中的大规模应用提供了潜在的前景。