Synthesis of vanadium-doped Ti3C2Tx MXene for enhanced lithium storage

Two-dimensional (2D) titanium carbide (MXene) is considered as a potential anode material for lithium-ion batteries (LIBs) by virtue of its unique structural and electronic properties. However, its performance for actual energy storage is seriously affected by the loss of transition metal elements during the preparation process of MXene. Herein, using a simple hydrothermal method, vanadium was successfully doped into the delaminated Ti3C2Tx (named as V-doped Ti3C2Tx). As-prepared V-doped Ti3C2Tx MXenes provide more active sites and lower Li+ diffusion resistance. As a result, their rate performance is significantly improved compared to that of pristine Ti3C2Tx. Additionally, its discharge capacity retains a value of 63.6 mAh g(-1) after 10,000 cycles at 10 A g(-1).