Sammendrag
MXenes, a type of two-dimensional transition metal carbide/nitride, have received significant attention for electrochemical storage applications. With substantial capacities predicted for Mg ions, MXenes have been considered a promising candidate for cathode materials for rechargeable Mg batteries (RMBs). While there have been reports demonstrating reversible capacities of 100–200 mA h g−1 for MXene-based cathodes, the understanding of the reactions occurring is limited. Here, we investigate unsolvated Mg2+ intercalation into multi-layered, non-delaminated MXene particles by electrochemical characterization of two common MXenes (Ti3C2Tx and V2CTx) with various electrolytes and at elevated temperatures, complemented by DFT calculations. Our experimental results show poor reversible capacities (
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