The two-dimensional transition metal carbides or nitrides Ti₃C₂T_x (MXene), has emerged as attractive electrode materials for lithium-ion batteries due to their metallic electrical conductivity and low ion diffusion barrier. However, the stabilities, electronic structures and other physicochemical properties of MXene are affected intensively by their surface species and structure. Here, a new architecture approach is demonstrated for reforming MXene through in situ-decorated LaF_3, for boosting the performance of Li batteries in terms of capacity and rate ability. Ti₃C₂T_x@LaF₃ can deliver an initial specific discharge capacity of 340 mAh/g under a current density of 50 mA/g and a reversible discharge capacity of 89.2 mAh/g at a current density of 1000 mA/g, which is significantly higher than that of pure Ti₃C₂T_x. Ti₃C₂T_x@LaF₃ heterostructures enhance Li‐ion storage performance by shortens the charge transfer distance and improves the charge transfer rate during electrochemical reaction.

二维过渡金属碳化物或氮化物Ti ₃ C ₂ T _x（MXene）由于其金属电导率和低离子扩散势垒而成为锂离子电池的有吸引力的电极材料。但是，MXene的稳定性，电子结构和其他物理化学特性受到其表面物种和结构的强烈影响。在这里，演示了一种新的体系结构方法，该方法可通过就地装饰的LaF ₃重整MXene _，从而在容量和倍率能力方面提高锂电池的性能。钛₃ C ₂ T _x @LaF ₃可以在50 mA / g的电流密度下提供340 mAh / g的初始比放电容量，在1000 mA / g的电流密度下可提供89.2 mAh / g的可逆放电容量，明显高于纯Ti ₃ C ₂ T _x。Ti ₃ C ₂ T _x @LaF ₃异质结构通过缩短电荷转移距离并提高电化学反应过程中的电荷转移速率来增强锂离子存储性能。