Synthesis of α-Mns Hierarchical Architectures By Chemical Vapor Deposition and Its Application As Anode Electrode for Li-Ion Batteries

MnS is a wide band gap (3.1 - 3.7 eV) p-type direct semiconductor that exists in three crystallographic polymorphs; the green α-MnS is the most stable with a rock-salt crystal structure, and the two metastables zincblende (β-MnS) and wurzite (γ-MnS) crystal structures. In particular, α-MnS have been reported to provide very good electrochemical performance for alternative anode electrodes to fabricate flexible all-solid state supercapacitors and electrodes for Li-ion batteries. α, γ, or β-MnS materials are usually synthesized by the chemical solution methods, such as solvothermal and hydrothermal techniques. However, our method in this work consists in the synthesis of free standing α-MnS hierarchical architectures by Chemical Vapor Deposition technique, which is suitable to prepare electrodes for Li-ion batteries. In this presentation, we discuss: a) the growth mechanism of α-MnS by Chemical Vapor Deposition technique; b) its structural, morphological, and compositional characterization; and c) the cyclic voltammetry, charge-discharge behavior, and cycling capacity of coin cells using α-MnS as the anode electrode.