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Metal oxide incorporated with a conductive polymer have shown great potential as high-performance energy storage devices. In this report, polyaniline wrapped silver decorated manganese dioxide (PANI/Ag@MnO 2) nanorods were successfully synthesized and used as positive electrode material. Cyclic voltammetry, galvanostatic charge discharge and electrochemical impedance spectroscopy were employed to investigate the electrochemical activities. The overall result demonstrates that as prepared PANI/Ag@MnO 2 nanorod performed better supercapacitor activities compared to Ag@MnO 2 and pure MnO 2. The PANI/Ag@MnO 2 nanocomposite exhibited a high specific capacitance of 1028.66 F g−1 at a current density of 1 A g−1 (nearly close to the theoretical capacitance of MnO 2). A detail investigation of the synergic effect of PANI, Ag and MnO 2 on electrochemical properties is presented sequentially. The assembled (PANI/Ag@MnO 2 //AC) asymmetric supercapacitor device showed a high energy density of 49.77 W h kg−1 at power density of 1599.75 W kg−1. The facile and cost-effective production of PANI/Ag@MnO 2 demonstrates a high specific capacitance and energy density with long life cycle introduces this material as a prospective candidate for energy management. Image 1 • PANI/Ag@MnO 2 nanorods was prepared and employed for supercapacitor application. • PANI/Ag@MnO 2 exhibits superior electrochemical performances. • A specific capacitance of 1028.66 Fg−1 was achieved at of 1 A g−1. • High energy (49.77 W h kg−1) and power (1599.75 W kg−1) densities are obtained. [ABSTRACT FROM AUTHOR]

We report a polyaniline-wrapped, manganese-doped titanium oxide (PANi/Mn-TiO2) nanoparticle composite for supercapacitor electrode and photocatalytic degradation. The PANi/Mn-TiO2 nanoparticles were synthesized using a solvothermal process, followed by oxidative polymerization of aniline. The structural properties of studied materials were confirmed by XRD, FTIR, HRTEM, FESEM, and UV visible spectroscopy. The as-prepared PANi/Mn-TiO2 nanoparticles revealed admirable electrochemical performance with a specific capacitance of 635.87 F g−1 at a current density of 1 A g−1 with a notable life cycle retention of 91% after 5000 charge/discharge cycles. Furthermore, the asymmetric cell with PANi/Mn-TiO2 as a positive electrode exhibited energy density of 18.66 W h kg−1 with excellent stability. Moreover, the PANi/Mn-TiO2 had promising photocatalytic activity for methylene blue degradation. The improved performance of PANi/Mn-TiO2 nanoparticles is attributed to the well-built synergetic effect of components that lead to significant reduction of band gap energy and charge transfer resistance, as revealed by UV visible spectroscopy and electrochemical impedance spectroscopy. [ABSTRACT FROM AUTHOR]