Aqueous rechargeable zinc ion batteries (ARZIBs) is considered one of the most compelling candidates for grid-scale energy storage owing to their cost effectiveness, good safety, eco-friendliness, high output voltage, and high capacity. However, their practical applications are still largely limited by the undesirable cyclability and high-rate capability. Here, we report a discovery that using a small amount (2 vol%) of diethyl ether (Et₂O) as the electrolyte additive could largely improve the performance of Zn–MnO₂ batteries. The addition of Et₂O yielded the first cycle coulombic efficiency of 95.6% at 50 mA/g, a high capacity of 115.9 mAh/g at 5 A/g and 97.7% retention of initial capacity after 4000 cycles, demonstrating an outstanding rate capability and cycling performance among the reported Mn-based zinc ions batteries in mild electrolyte. Ex-situ characterizations revealed that appropriate amount of Et₂O molecules could effectively suppress the formation of Zn dendrites on Zn anode, which is the main mechanism for cyclability improvements.

水性可充电锌离子电池（ARZIBs）由于其成本效益，良好的安全性，生态友好性，高输出电压和高容量而被认为是电网规模储能最有力的候选者之一。然而，它们的实际应用仍然受到不希望的循环能力和高倍率能力的很大限制。在这里，我们报告了一个发现，即使用少量（2％（体积））的乙醚（Et ₂ O）作为电解质添加剂可以大大改善Zn-MnO ₂电池的性能。Et _2的添加O在50 mA / g时产生的第一循环库仑效率为95.6％，在5 A / g时具有115.9 mAh / g的高容量，并在4000次循环后保留了97.7％的初始容量，证明了在循环过程中出色的速率能力和循环性能报道了在温和电解质中的锰基锌离子电池。异位表征表明，适量的Et ₂ O分子可有效抑制Zn阳极上Zn树枝状晶体的形成，这是提高可循环性的主要机理。