A Hybrid Assembly of MXene with NH 2 −Si Nanoparticles Boosting Lithium Storage Performance

A facile hybrid assembly between Ti 3 C 2 T x MXene nanosheets and (3‐aminopropyl) triethoxylsilane‐modified Si nanoparticles (NH 2 −Si NPs) was developed to construct multilayer stacking of Ti 3 C 2 T x nanosheets with NH 2 −Si NPs assembling together (NH 2 −Si/Ti 3 C 2 T x ). NH 2 −Si/Ti 3 C 2 T x exhibits a significantly enhanced lithium storage performance compared to pristine Si, which is attributed to the robust crosslinking architecture and considerably improved electrical conductivity as well as shorter Li + diffusion pathways. The optimized NH 2 −Si/Ti 3 C 2 T x anode with Ti 3 C 2 T x : NH 2 −Si mass ratio of 4 : 1 displays an enhanced capacity (864 mAh g −1 at 0.1 C) with robust capacity retention, which is significantly higher than those of NH 2 −Si NPs and Ti 3 C 2 T x anodes. Furthermore, this work demonstrates the important effect of the MXene‐based electrode architecture on the electrochemical performance and can guide future work on designing high‐performance Si/MXene hybrids for energy storage applications.