Magnesium is a promising anode material. However, the magnesium anode will quickly react with the electrolyte to form an ion-insulated passivation film, resulting in voltage hysteresis. Because the magnesium anode is easily corroded, it leads to a decrease in its electrochemical performance. In this paper, the anode of the magnesium battery was modified by ZIF-8 coating. The ZIF-8 coating can largely prevent contact between water in the solution and the surface of the magnesium anode, which can inhibit the passivation of the magnesium anode. The voltage hysteresis time is significantly reduced from 4 s before modification to 0.3 s, which also effectively reduces the resistance of the battery. Compared with the unmodified magnesium battery, the modified magnesium battery has a larger initial voltage and a longer discharge platform. The anode utilization rate is doubled compared with that before modification, and the specific energy density is also greatly improved. The ZIF-8 coating with porous network structure and hydrophobicity can slow down the infiltration of corrosive substances to some degree, prolong its transmission path, and provide better protection for the magnesium anode.

中文翻译：

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ZIF-8对镁电池阳极进行改性，改善电压迟滞和耐腐蚀问题

镁是一种很有前途的负极材料。然而，镁阳极会快速与电解液反应，形成离子绝缘的钝化膜，导致电压迟滞。由于镁阳极很容易被腐蚀，导致其电化学性能下降。本文采用ZIF-8涂层对镁电池负极进行改性。 ZIF-8涂层可以很大程度上阻止溶液中的水与镁阳极表面的接触，从而抑制镁阳极的钝化。电压迟滞时间由修改前的4s大幅缩短至0.3s，也有效降低了电池的内阻。与未改性的镁电池相比，改性后的镁电池具有更大的初始电压和更长的放电平台。阳极利用率较改性前提高了一倍，比能量密度也大幅提高。具有多孔网络结构和疏水性的ZIF-8涂层可以在一定程度上减缓腐蚀性物质的渗透，延长其传输路径，为镁阳极提供更好的保护。