Abstract
Molybdenum disulfide/reduced graphene oxide/polyaniline ternary composites (MoS2/rGO/PANI) were designed and synthesized by a facile two-step approach including hydrothermal and in situ polymerization process. The MoS2/rGO/PANI composites presented an interconnected 3D network architecture, in which PANI uniformly coated the outer surface of the MoS2/rGO binary composite. The MoS2/rGO/PANI composites with a weight percent of 80% (MGP-80) exhibits the best specific capacitance (570 F g−1 at 1 A g−1) and cycling stabilities (78.6% retained capacitance after 500 cycles at 1 A g−1). The excellent electrochemical capacitive performance is attributed to its 3D network structure and the synergistic effects among the three components that make the composites obtain both pseudocapacitance and double-layer capacitance.
Highlights
To meet the burgeoning need of light-weight and portable electronic devices, efficient and environmentally-friendly electrochemical energy storage systems are urgently developed (Liu et al, 2017)
In the diffraction spectrum of the MoS2/rGO/PANI ternary composites, there are some characteristic diffraction peaks of both MoS2/rGO and PANI, revealing that the PANI is successfully attached onto the surface of the MoS2/rGO binary composite
With the increased weight percent of PANI, PANI coated MoS2/rGO assemble to generate a compact and laminated morphology so that the layer structure of MoS2/rGO is not clearly seen due to the low content (Figures 3d–f). Such particular structure of the MoS2/rGO/PANI ternary composites could increase the dispersion of PANI and improve the interfaces of PANI with electrolyte, which might be beneficial for the improvement of electrochemical performance of the MoS2/rGO/PANI ternary composite as electrode materials
Summary
To meet the burgeoning need of light-weight and portable electronic devices, efficient and environmentally-friendly electrochemical energy storage systems are urgently developed (Liu et al, 2017). In the MoS2/rGO/PANI ternary composites, the weight percent of PANI can effectively improve their electrochemical performance when they serve as the electrode materials in supercapacitors.
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