In aqueous aluminum‐ion batteries(AAIBs), the insertion/extraction chemistry of Al3+ often leads to poor kinetics, whereas the rapid diffusion kinetics of hydrated hydrogen ions (H3O+) may offer the solution. However, the presence of considerable Al3+ in the electrolyte hinders the insertion reaction of H3O+. Herein, we report how oxygen‐deficient α‐MoO3 nanosheets unlock selective H3O+ insertion in a mild aluminum‐ion electrolyte. The abundant oxygen defects impede the insertion of Al3+ due to excessively strong adsorption, while allowing H3O+ to be inserted/diffused through the Grotthuss proton conduction mechanism. This research advances our understanding of the mechanism behind selective H3O+ insertion in mild electrolytes.

中文翻译：

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氧空位促进水合氢嵌入：铝基电池的范式转变

在水性铝离子电池（AAIB）中，Al3+的插入/脱出化学反应通常会导致动力学较差，而水合氢离子（H3O+）的快速扩散动力学可能提供解决方案。然而，电解质中大量Al3+的存在阻碍了H3O+的插入反应。在此，我们报告了缺氧的 α-MoO3 纳米片如何在温和的铝离子电解质中选择性插入 H3O+。丰富的氧缺陷由于过强的吸附而阻碍了Al3+的插入，同时允许H3O+通过Grotthuss质子传导机制插入/扩散。这项研究增进了我们对温和电解质中选择性 H3O+ 插入背后机制的理解。