Mo2C Nanodots Anchored on N‐Doped Porous CNT Microspheres as Electrode for Efficient Li‐Ion Storage

Abstract For the first time, red‐blood‐cell‐like porous Mo 2 C@CNT microspheres are synthesized through a facile and scalable spray‐drying approach. As an anode for the lithium‐ion (Li‐ion) battery (LIB), the Mo 2 C@CNT hybrid demonstrates superior electrochemical performances with a high reversible capacity of 1065 mAh g −1 after 100 cycles at 0.1 A g −1 , a large and stable capacity of 878 mAh g −1 even after 750 cycles at 1.6 A g −1 , and large capabilities of 460 and 190 mAh g −1 after 100 cycles even at 8.0 and 16.0 A g −1 , respectively, suggesting the outstanding long‐cycle high‐rate performance. The superior Li‐ion storage is attributed to the unique porous hierarchical structure, as constructed with Mo 2 C nanodots homogeneously and tightly anchored on a porous and highly conductive N‐doped carbon nanotubes (CNTs) microspheric skeleton, which provides abundant electrochemically active sites and facilitates the electron and ion transportation. This work provides a novel, scalable, and cost‐effective route to the hybrid of transition‐metal‐based compounds and carbonaceous nanomaterials as high‐performance electrode for LIBs.