Embedding Heterostructured α‐MnS/MnO Nanoparticles in S‐Doped Carbonaceous Porous Framework as High‐Performance Anode for Lithium‐Ion Batteries

Abstract

AbstractIn this work, the synthesis of α‐MnS/MnO/S‐doped C micro‐rod composites via a simple sulfidation process is demonstrated, starting from a Mn‐based metal‐organic framework. The resulting heterostructured α‐MnS/MnO nanoparticles (8±2 nm) are uniformly embedded into the S‐doped carbonaceous porous framework with hierarchical micro‐/meso‐porosity. The combination of structural and compositional characteristics results in the promising electrochemical performance of the as‐obtained composites as anode materials for lithium‐ion batteries, coupled with high reversible capacity (940 mAh g−1 at 0.1 A g−1), excellent rate capability as well as long cycling lifespan at high rate of 2.0 A g−1 for 2000 cycles with the eventual capacity of ∼300 mAh g−1. Importantly, in situ X‐ray diffraction studies clearly reveal mechanistic details of the lithium storage mechanism, involving multistep conversion processes upon initial lithiation.