Architecting Nb‐TiO_2−x/(Ti_0.9Nb_0.1)₃C₂T_x MXene Nanohybrid Anode for High‐Performance Lithium‐Ion Batteries

Abstract

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)3C2Tx 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)3C2Tx 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.

Synthesis and applications of double metal MXenes: A review

“…Therefore, the bimetallic MXenes composite based on metal oxide has been considered. In the studies of Dai et al, (Ti 0.9 Nb 0.1 ) 3 C 2 has shown a specific capacity of 280 mAh/g at a current density of 0.1 A/g and retains 91.5% of its capacity after 2000 cycles [75]. Hence, the Nb-TiO 2 /(Ti 0.9 Nb 0.1 ) 3 C 2 nanohybrid architecture through an annealing approach leads to a high-performance and stable anode material due to reversible and fast Li ions diffusion and storage with Nb-TiO 2 support.…”