Hierarchical structural PEDOT@MoS 2 nanocomposite is synthesized via a facile electrochemical co-deposition of the intercalation of PEDOT into flower-like MoS 2 microspheres. The SEM, TEM, and other characterization results demonstrate the hierarchical PEDOT@MoS 2 composite with an enlarged interlayer spacing of MoS 2 to 1.02 nm, in which PEDOT nanoparticles act as intercalation, and flower-like MoS 2 microspheres are used as a substrate for growth. The electrochemical characterizations indicate that the PEDOT@MoS 2 electrode has an ultra-high specific capacitance of 4418 mF cm −2 at 2 mA cm −2 and remarkable cycling stability, retaining 100% of the initial capacitance at a high current density of 100 mA cm −2 after 10,000 cycles. The symmetric PEDOT@MoS 2 supercapacitor presents a high energy density of 88.3 mWh cm −2 at 60 mW cm −2 , and outstanding cycling stability (93% after 10,000 cycles). These prominent electrochemical performances are attributed to the expanded interlayer spacing, the synergistic effect between PEDOT and MoS 2 , the low resistance, along with the PEDOT@MoS 2 porous structure, indicating great potential applications of the PEDOT@MoS 2 electrode in the energy storage field.
An active material electrode with high areal specific capacitance is needed for a high-performance supercapacitor, but it is difficult to achieve this goal for PEDOT-based composites. Here, a novel hierarchical core/shell PEDOT@MoS 2 composite was assembled by the electrochemical co-deposition of EDOT and MoS 2 submicron spheres. The SEM, TEM images of the as-obtained composite explicitly reveal the core/shell heterostructure of PEDOT@MoS 2 with a diameter of about 800 nm. The electrochemical characterizations show that the optimized PEDOT@MoS 2 composite possesses a high specific capacitance of 2540 mF cm −2 at 1 mA cm −2 and excellent capacitance retention of 98.5% after 5000 cycles at a high current density of 100 mA cm −2 . The assembled P@M-4//PEDOT asymmetric supercapacitor shows a high energy density of 937 Wh m − 2 at 6500 W m − 2 , and outstanding cycling stability with capacitance retention of 100% after 5000 cycles. It is proposed that the enhanced performances are attributed to the robust hierarchical core/shell structures and the synergic effect between PEDOT and MoS 2 , which is expected to become a promising candidate for applications in high-performance supercapacitors.
危险品化学品经营许可证（带存储）