Aqueous Zn metal batteries (ZMBs) are promising for next-generation energy storage. However, the grievous Zn dendrite growth at low temperatures and severe parasitic reactions of Zn metal anode at high temperatures greatly restrict the development of wide-temperature aqueous ZMBs. Herein, the above problems faced by Zn metal anode are solved by introducing a multi-hydroxyl polymer (polyethylene glycol, PEG) cosolvent, and thus high cyclic stability of aqueous ZMBs under wide temperatures (-20 to 80 °C) is achieved. At subzero temperatures, PEG adsorbed on the Zn surface induces uniform deposition of Zn²⁺, which inhibits dendrite growth. Meanwhile, the interaction between PEG and water molecules diminishes the activity of free water by perturbing hydrogen bonds, which suppresses the parasitic reactions of Zn anode at elevated temperatures. As a result, Zn||Zn symmetric cells achieve an ultralong-term cycling life of over 1000 h at 0.2 mA cm⁻² at −20 °C or at 1 mA cm⁻² at 20 °C, and exhibit an ultrahigh cumulative cycling capacity (CCC) of over 1500 mAh cm⁻² at 60 °C, which is superior to the previously reported ZMBs. Moreover, the Zn||PANI@V₂O₅ full batteries also exhibit excellent electrochemical performance from −20 °C to 80 °C, suggesting great potential for practical applications.

水系锌金属电池（ZMB）有望用于下一代储能。然而，低温下严重的锌枝晶生长和高温下锌金属负极的严重寄生反应极大地限制了宽温水系ZMBs的发展。在此，通过引入多羟基聚合物（聚乙二醇，PEG）助溶剂解决了锌金属负极面临的上述问题，从而实现了水性 ZMB 在宽温度（-20 至 80 ℃）下的高循环稳定性。在零下温度下，吸附在 Zn 表面上的 PEG 诱导 Zn ^{2+的均匀沉积}，从而抑制枝晶生长。同时，PEG与水分子之间的相互作用通过扰动氢键降低了游离水的活性，从而抑制了锌负极在高温下的寄生反应。因此，Zn||Zn 对称电池在 -20 °C下 0.2 mA cm ^{-2或 20 °C 下 1 mA cm -2}下实现了超过 1000 小时的超长期循环寿命，并表现出超高的累积循环在 60 °C时容量 (CCC) 超过 1500 mAh cm ^-2，优于先前报道的 ZMB。此外，Zn||PANI@V ₂ O ₅全电池在-20°C至80°C范围内也表现出优异的电化学性能，具有巨大的实际应用潜力。