In situ intercalative polymerization of pyrrole in graphene analogue of MoS2 as advanced electrode material in supercapacitor

We report a facile strategy to synthesize of polypyrrole/molybdenum disulfide (PPy/MoS2) nanocomposite as an advanced electrode material for high-performance supercapacitors applications. Flowerlike MoS2 with graphene-like subunits structure is prepared using a hydrothermal method, and the nanocomposite PPy are embedded in MoS2 nanosheets is prepared by in situ oxidation polymerization of pyrrole in the presence of MoS2 suspension. Structural and morphological characterizations of the nanocomposite are investigated by XRD, FE-SEM and TEM measurements. Their electrochemical properties are also investigated using cyclic voltammetry, and galvanostatic charge/discharge. The PPy/MoS2 nanocomposite exhibit high specific capacitance of 553.7 F g−1 and its capacitance can still remain 90% after 500 cycles at a current density of 1 A g−1.

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► Flowerlike MoS2 with graphene-like structure is prepared by hydrothermal method.
► The PPy/MoS2 nanocomposite is prepared by in situ oxidation polymerization.
► The MoS2 provides a path for insertion and extraction of ions within PPy.
► This PPy/MoS2 nanocomposite exhibit high capacity and excellent cycling stability.