Architecting Nb-TiO2-x/(Ti0.9Nb0.1)3C2Tx MXene Nanohybrid Anode for High-Performance Lithium-Ion Batteries

MXene-based materials with excellent conductivity and stability features have attracted worldwide attention as anode of lithium-ion batteries (LIBs), while the serious stacking issue and low capacity still hinder its further development in the field of energy storage. In this work, a nanohybrid architecture (Nb-TiO2-x/MXene) is prepared with Nb-TiO2-x particles conformally coated on the (Ti0.9Nb0.1)(3)C2Tx MXene via a facile annealing method, which delivers a high specific capacity of 279.2 mAh g(-1) at the current density of 0.1 A g(-1) and a superior capacity retention of 91.5% after 2000 cycle at 1 A g(-1) as the anode material of LIBs. Importantly, the (Ti0.9Nb0.1)(3)C2Tx MXene layers provide sufficient active sites and open pathways as well as structural support for the reversible Li+ insertion/extraction, and the Nb-TiO2-x particles enable reversible and fast Li+ diffusion and storage, thus leading to high-performance and durable anode materials. This work offers a guidance for the elaborate design of MXene-based nanostructured electrodes toward advanced energy storage devices.