Mesoporous Manganese Sulfide Spheres Anchored on Graphene Sheets as High-Capacity and Long-Life Anode Materials for Lithium-Ion Batteries

A novel porous manganese sulfide/graphene composite was prepared by a simple insitu solvothermal approach. These mesoporous manganese sulfide sub-microspheres with an average diameter of 700nm were anchored homogeneously onto graphene nanosheets. Such a special microstructure not only effectively alleviates the mechanical strain of the electrode upon lithiation/delithiation, but it also improves contact between the electrode materials and the electrolyte. As a result, the composite exhibits a high Li-ion storage capacity and excellent cycling stability as an anode material for lithium-ion batteries. At a current of 50mAhg^-1, the material delivers a reversible capacity up to 1231mAhg^-1; at a current density of 0.2Ag^-1, the material still retains a reversible capacity of 735mAhg^-1 after 300cycles.