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

Abstract

A novel porous manganese sulfide/graphene composite was prepared by a simple in situ solvothermal approach. These mesoporous manganese sulfide sub‐microspheres with an average diameter of 700 nm 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 50 mA h g−1, the material delivers a reversible capacity up to 1231 mA h g−1; at a current density of 0.2 A g−1, the material still retains a reversible capacity of 735 mA h g−1 after 300 cycles.

Solvothermal Synthesis of Mesoporous Manganese Sulfide Nanoparticles Supported on Nitrogen and Sulfur Co‐doped Graphene with Superior Lithium Storage Performance

“…75‐1560). This result is different from those reported previously, because of the different final temperature in the TGA measurements (900 °C in previous studies and 1000 °C in our study). The weight loss of pure MnS is about 10 %.…”

“…A first‐cycle discharge capacity of 1662.6 mA h g −1 was obtained, with a reversible capacity as high as 1004.9 mA h g −1 . The irreversible capacity loss could be ascribed to the inevitable formation of the SEI layer; this is similar for most anode materials . The reversible capacity reached 989.2 mA h g −1 after 100 cycles.…”

“…When employed as LIB anodes, the resulting NS‐G/MnS composites exhibited excellent anodic performances. Such composites show superior lithium storage performances when compared with the performance of previously reported MnS‐based anode materials . These results can be explained by two reasons: 1) N and S co‐doping can introduce additional defects and disorder into the graphene framework; these defects are very favorable for Li + ion storage, and thus, improve the capacity of LIBs.…”

“…To enhance the anodic performance of these materials, carbonaceous materials [for example, graphene or reduced graphene oxide (rGO), carbon nanotubes, carbon nanofiber, and pyrolysis carbon] usually served as a matrix to prepare the nanocomposite with these TMSs; this approach has attracted considerable attention in recent years . Some examples of MnS‐based nanocomposite anode materials include hollow α‐MnS spheres/rGO hybrids, coral‐like α‐MnS/N‐doped carbon, 3D graphene cross‐linked with mesoporous MnS clusters, mesoporous MnS sub‐microspheres/graphene composite, γ‐MnS/rGO nanocomposites, MnS hollow microspheres/rGO composite, and γ‐MnS nanowires/carbon . Among these carbonaceous materials, graphene is a superior substrate for hosting active materials for LIB applications due to its superior mechanical, electrical, and chemical properties .…”

Dandelion-shaped manganese sulfide in ether-based electrolyte for enhanced performance sodium-ion batteries

“…2) gradually breaks down the DS-MnS particle into nanosized seeds particles. Similar material breakdown phenomena occurred in the carbonate-based electrolyte systems, which seriously affected the electrode mechanical strength 61,62 . Owing to an enduring protective layer, NaPF 6 /diglyme could serve as a welding agent to preserve the electrode material mass during sodium-ion exchange.…”