Low‐temperature electrochemical extraction of active metals from their corresponding chlorides in ionic liquids has long been a scientific challenge, while extraction from oxides is even more difficult. Inspired by previous reports of the electrochemical deposition of various non‐active metals from their corresponding oxides in diverse ionic liquids, we demonstrate the successful electrodeposition of active Li on high‐purity Al‐plate substrates at relatively low temperature (353 K), as confirmed by X‐ray diffraction. Furthermore, Al−Li alloy nanosheets can also be obtained on the Al surface by solid‐state cathode alloying. The Li source was Li₂O, which was dissolved in a highly stable Al‐containing solvate ionic liquid. The dissolution mechanism and electrodeposition behaviour of Li₂O were investigated using multinuclear nuclear magnetic resonance spectroscopy, theoretical calculations, and electrochemical techniques. The findings are expected to provide a theoretical basis and method for low‐temperature electrochemical extraction of active metals from their oxides.

中文翻译：

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在高度稳定的含铝离子液体中直接从氧化锂中电化学沉积锂

从离子液体中相应的氯化物进行低温电化学提取活性金属一直是科学上的挑战，而从氧化物中提取则更加困难。受先前关于各种非活性金属从其相应氧化物在各种离子液体中的电化学沉积的报道的启发，我们证实了活性锂在相对较低的温度（353 K）下在高纯度Al-plate基板上的成功电沉积，已证实通过X射线衍射。此外，还可以通过固态阴极合金化在Al表面获得Al-Li合金纳米片。Li的来源是Li ₂ O，它溶解在高度稳定的含Al溶剂化物离子液体中。Li ₂的溶解机理和电沉积行为使用多核核磁共振波谱，理论计算和电化学技术对O进行了研究。这些发现有望为从氧化物中活性金属的低温电化学提取提供理论依据和方法。