Rechargeable aqueous Zn metal batteries (AZMBs) are attractive for stationary energy storage due to their low cost and high safety. However, their practical application is hindered by the excessive use of zinc anodes and poor high‐temperature performance, caused by severe side reactions and dendritic growth issues. Here, an electrolyte design strategy is reported based on bidentate coordination of Zn2+ and solvent to tailor the solvation structure. The triethylene glycol (TEG) co‐solvent with two‐oxygen coordination sites is demonstrated to facilitate the formation of an anions‐involved solvation shell, greatly reducing the activity of coordinated H2O molecules. The sequential reduction of OTF‐ anions and TEG to form an organic‐inorganic bilayer SEI (hydrophobic organic layer and high ion conductivity inorganic layer), protecting Zn anodes from side reaction and dendrite growth, thus ensuring an unprecedented Zn reversibility (99.95% over 5000 cycles at 0.5 mA cm‐2). More importantly, the full cells of Zn||V2O5 exhibit a record‐high cumulative capacity (2552 mAh cm‐2) under a lean electrolyte condition (E/C ratio = 15 μL mAh‐1), a limited Zn supply (N/P ratio = 1.9) and a high areal capacity (3.0 mAh cm‐2).

中文翻译：

---

双齿配位使先进水性锌金属电池的阴离子调节溶剂化结构成为可能


可充电水性锌金属电池（AZMB）由于其低成本和高安全性而对于固定储能很有吸引力。然而，它们的实际应用受到了锌阳极的过度使用以及严重的副反应和枝晶生长问题导致的较差的高温性能的阻碍。在此，报告了一种基于 Zn2+ 和溶剂的双齿配位来定制溶剂化结构的电解质设计策略。具有双氧配位位点的三甘醇 (TEG) 共溶剂被证明可以促进阴离子参与的溶剂化壳的形成，从而大大降低配位 H2O 分子的活性。 OTF-阴离子和TEG的顺序还原形成有机-无机双层SEI（疏水性有机层和高离子电导率无机层），保护锌阳极免受副反应和枝晶生长，从而确保前所未有的锌可逆性（超过5000年99.95％） 0.5 mA cm-2 下的循环）。更重要的是，Zn||V2O5全电池在贫电解质条件下（E/C比= 15 μL mAh-1）、有限的Zn供应（N/ P 比 = 1.9）和高面积容量（3.0 mAh cm-2）。