This study exhibits a design of the discharge product film of a bulk AZ63-Ce-La-Ca (AZ63X) anode for Mg-air battery. An ideal discharge product film for Mg anode is that it could inhibit the anodic hydrogen evolution but does not hinder the transfer of the electrons at the interface. Fortunately, the addition of Ce, La, and Ca into AZ63 alloy achieves this goal. The Mg-air battery with AZ63X anode in 3.5 % NaCl has an ultrahigh anodic efficiency of 85.7 ± 1.7 % and energy-density of 2431 ± 53 mWh g^-1 with the unique discharge product film, surpassing the values of most reported Mg-air batteries. Furthermore, the alloying elements reduce the anode delamination effect significantly by transforming the block Mg₁₇Al₁₂ phase into the connected Mg₁₇Al₁₂ structure and fine rod Al₂RE and Al₂Ca.

中文翻译：

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通过块状镁负极的放电产物膜设计实现超高阳极效率和能量密度镁空气电池


本研究展示了用于镁空气电池的体 AZ63-Ce-La-Ca （AZ63X） 负极的放电产物膜设计。Mg 负极的理想放电产物膜是它可以抑制阳极析氢，但不妨碍界面处电子的转移。幸运的是，在 AZ63 合金中添加 Ce、La、Ca 实现了这一目标。AZ63X 负极在 3.5% NaCl 中采用 AZ63X 的镁空气电池具有 85.7 ± 1.7% 的超高阳极效率和 2431 ± 53 mWh ^g-1 的能量密度，具有独特的放电产物膜，超过了大多数报道的镁空气电池的值。此外，合金元素通过将嵌段 Mg₁₇Al₁₂ 相转化为相连的 Mg₁₇Al₁₂ 结构和细棒 Al₂RE 和 Al₂Ca，显著降低了阳极分层效应。