Rechargeable magnesium (Mg) battery with high volumetric energy density is one of the most promising candidates for next-generation safe and clean renewable energy sources. Just like rechargeable lithium battery, the development of anode materials beyond metal Mg will greatly promote the practical process of rechargeable Mg battery system. In this study, we propose a strategy to realize the reversible storage of Mg2+ in possible zero-strain layered transition metal oxides (Li2TiO3) via nanotechnology for the first time. The as-prepared layered Li2TiO3 anode shows good cycling stability with a highly reversible Mg2+ storage capacity of 110 mA h g−1. The unusual Mg storage mechanism with stable phase transition reaction is proposed by various ex situ analyzing and testing techniques which will help advance the development process of the long-life rechargeable Mg batteries.

中文翻译：

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层状钛基过渡金属氧化物作为镁离子电池的稳定负极材料

具有高体积能量密度的可充电镁（Mg）电池是下一代安全清洁可再生能源最有希望的候选者之一。就像可充电锂电池一样，超越金属镁的负极材料的发展将极大地推动可充电镁电池系统的实用化进程。在这项研究中，我们提出了一种策略，首次通过纳米技术实现 Mg2+ 在可能的零应变层状过渡金属氧化物 (Li2TiO3) 中的可逆存储。所制备的层状 Li2TiO3 负极显示出良好的循环稳定性，具有 110 mA hg-1 的高度可逆的 Mg2+ 存储容量。