Bismuth Nanoparticles Anchored on Ti3C2Tx MXene Nanosheets for High‐Performance Sodium‐Ion Batteries

Abstract

Sodium-ion batteries are the promising energy storage systems, but they are facing huge challenges in designed fast charging anode. Bismuth (Bi)-based anode is considered as candidate for fast charging anode of sodium ion battery due to its excellent rate performance. Herein, we designed a two-dimensional Bi/MXene anode based on hydrogen thermal reduction strategy. Benefit from microstructure advantages, Bi/MXene anode exhibited excellent rate capability and superior cycle performance in Na//Bi/MXene half-battery and Na 3 V 2 (PO 4 ) 3 /C//Bi/MXene full-battery. Moreover, full-battery can complete a charge/discharge cycle in 7 mins and maintain a specific capacity of 53 mA h g -1 (calculated based on the mass of cathode material) after 7000 cycles. All electrochemical test results showed that Bi/MXene anode is a potential anode material with fast charge/discharge capability for sodium ion batteries.