Core–Shell α‐Fe₂O₃@α‐MoO₃ Nanorods as Lithium‐Ion Battery Anodes with Extremely High Capacity and Cyclability

Abstract

Abstract α‐Fe 2 O 3 nanoparticles are uniformly coated on the surface of α‐MoO 3 nanorods through a two‐step hydrothermal synthesis method. As the anode of a lithium‐ion battery, α‐Fe 2 O 3 @α‐MoO 3 core–shell nanorods exhibit extremely high lithium‐storage performance. At a rate of 0.1 C (10 h per half cycle), the reversible capacity of α‐Fe 2 O 3 @α‐MoO 3 core–shell nanorods is 1481 mA h g −1 and a value of 1281 mA h g −1 is retained after 50 cycles, which is much higher than that retained by bare α‐MoO 3 and α‐Fe 2 O 3 and higher than traditional theoretical results. Such a good performance can be attributed to the synergistic effect between α‐Fe 2 O 3 and α‐MoO 3 , the small size effect, one‐dimensional nanostructures, short paths for lithium diffusion, and interface spaces. Our results reveal that core–shell nanocomposites have potential applications as high‐performance lithium‐ion batteries.