02307nas a2200181   4500008004100000245013600041210006900177260000800246300001200254490000800266520161200274100002301886700002701909700002201936700001801958700002501976856012402001       2016                        eng d00aEnhanced electrochemical performance of polypyrrole coated MoS2 nanocomposites as electrode material for supercapacitor application0 aEnhanced electrochemical performance of polypyrrole coated MoS2   cDEC  a278-2870 v7823 aBinary nanocomposites of polypyrrole (PPY) and Molybdenum disulfide (MoS2), with varying weight% of MoS2 viz. MP1, MP2, and MP3 corresponding to 12.5, 25, and 50% of MoS2 respectively, were prepared via. in-situ polymerization method. X-ray diffraction (XRD), field emission scanning microscopy (FESEM), and transmission electron microscopy (TEM) were employed to study the structure and morphology of the prepared nanocomposites. The electrochemical properties were studied by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques. The nanocomposite electrode material MP2 reached a specific capacitance of 400 F/g at the current density 1 A/g which was higher than that of pure PPY and the other two nanocomposites viz. MP1 and MP3 having different compositions of MoS2 and PPY than that of MP2. It was noteworthy that the maximum capacitance value was obtained only for an optimum dose of MoS2 (MP2 in this case with 25% of MoS2) and any deviation from which ultimately degraded the capacitive performance of the nanocomposite electrode material. This could be attributed to the occurrence of maximum interaction between MoS2 and PPY in the nanocomposite only at a particular concentration of its host materials. The results showed that the specific capacitance of MP2 nanocomposite declined by 7.2% after 5000 cycles. Further, MP2 nanocomposite electrode showed much higher energy density (8.88 Wh/kg) as well as power density (2286 W/kg) which were higher than that shown by PPY electrode. (C) 2016 Elsevier B.V. All rights reserved.1 aThakur, Anukul, K.1 aChoudhary, Ram, Bilash1 aMajumder, Mandira1 aGupta, Govind1 aShelke, Manjusha, V.  uhttp://library.ncl.res.in/content/enhanced-electrochemical-performance-polypyrrole-coated-mos2-nanocomposites-electrode01731nas a2200169   4500008004100000245015600041210006900197260000800266300001600274490000600290520104100296100002201337700002701359700002401386700002201410856012901432       2017                        eng d00aImpact of rare-earth metal oxide (Eu 2 O 3 ) on the electrochemical properties of a polypyrrole/CuO polymeric composite for supercapacitor applications0 aImpact of rareearth metal oxide Eu 2 O 3 on the electrochemical   cMAR  a20037-200480 v73 aA ternary composite of polypyrrole/copper oxide/europium oxide (PPY/CuO/Eu2O3), synthesized via a facile in situ chemical oxidative polymerization method, exhibits the maximum specific capacitance of 320 F g⁻¹ at the current density of 1 A g⁻¹. Incorporation of the rare-earth metal oxide Eu2O3 in the PPY/CuO matrix can promote charge transportation in the resulting ternary nanocomposite by enhancing the porosity. The interconnected mesoporous networks reduce the internal resistance and the charge transfer resistance (Rct) of the composite electrode material. Moreover, the incorporation of Eu2O3 in the PPY/CuO provides support to the fragile polymer backbone resulting in an excellent cycle stability and a markedly enhanced thermal stability. These together with the exhibition of an excellent coulombic efficiency demonstrates that incorporation of rare earth metal oxide can play a significant role in improving the performance of a polymeric composite opted as an electrode material for high-performance supercapacitor.1 aMajumder, Mandira1 aChoudhary, Ram, Bilash1 aThakur, Anukul., K.1 aKarbhal, Indrapal  uhttp://library.ncl.res.in/content/impact-rare-earth-metal-oxide-eu-2-o-3-electrochemical-properties-polypyrrolecuo-polymeric