01897nas a2200277   4500008004100000022001400041245011700055210006900172260007400241300001400315490000700329520085600336653003701192653003501229653002601264653002001290653002801310100002001338700001701358700002301375700002101398700002201419700002401441700002601465856012801491       2009                        eng d  a0021-891X00aDesign of an "allsolid-state'' supercapacitor based on phosphoric acid doped polybenzimidazole (PBI) electrolyte0 aDesign of an allsolidstate supercapacitor based on phosphoric ac  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJUL  a1097-11030 v393 a<p>The effectiveness of phosphoric acid doped polybenzimidazole as a polymer electrolyte membrane to fabricate an all solid-state super capacitor has been explored using hydrous RuO(2)/carbon composite electrodes (20 wt.%) of surface area 250 m(2) g(-1) with many intrinsic advantages. The electrochemical evaluation of these super capacitors through cyclic voltammetry, charge/discharge and impedance measurements demonstrate the utility of this type of thin, compact and flexible supercapacitor capable of functioning at 150 degrees C to yield a maximum capacitance of about 290 F g(-1) along with a life of more than 1,000 cycles. A power density of 300 W kg(-1) and energy density of 10 Wh kg(-1) have been accomplished although the equivalent series resistance (ESR) of about 3.7 Omega needs to be reduced further for high rated applications.</p>10aElectrochemical characterization10aElectrochemical supercapacitor10aEnergy storage device10aPBI electrolyte10aRuO(2)/carbon composite1 aRathod, Dhanraj1 aVijay, Meenu1 aIslam, Md., Nazrul1 aKannan, Ramaiyan1 aKharul, Ulhas, K.1 aKurungot, Sreekumar1 aPillai, Vijayamohanan  uhttps://library.ncl.res.in/content/design-allsolid-state-supercapacitor-based-phosphoric-acid-doped-polybenzimidazole-pbi-002369nas a2200157   4500008004100000245010500041210006900146260000800215300001400223490000700237520176800244100002102012700002202033700002802055856012802083       2018                        eng d00aDesign, synthesis, and gas permeation properties of polyimides containing pendent imidazolium groups0 aDesign synthesis and gas permeation properties of polyimides con  cAUG  a1721-17290 v563 aFilm-forming polymers containing ionic groups have attracted considerable attention as emerging materials for gas separation applications. The aim of this article was to synthesize new film-forming polyimides containing imidazolium groups (PI-IMs) and establish their structure-performance relationship. In this context, a new aromatic diamine, namely, N-1-(4-aminophenyl)-N-1-(4-(2-phenyl-1H-imidazol-1-yl)phenyl)benzene-1,4-diamine (ImTPADA), was synthesized and polycondensed with three aromatic dianhydrides, namely, 4,4-(hexafluoroisopropylidene)diphthalic anhydride, 4,4-(4,4-isopropylidenediphenoxy) bis(phthalic anhydride), and 4,4-oxydiphthalic anhydride to form the corresponding polyimides containing pendent 2-phenylimidazole groups (PI-IEs). Next, PI-IMs were prepared by N-quaternization of pendent 2-phenylimidazole groups present in PI-6FDA using methyl iodide followed by anion exchange with bis(trifluoromethane)sulfonimide lithium salt (LiTf2N). PI-IEs and PI-IMs exhibited reasonably high molecular weights, amorphous nature, good solubility, and could be cast into self-standing films from their DMAc solutions. Thermogravimetric analysis showed that 10% weight loss temperature of PI-IEs and PI-IMs were in the range 545-475 degrees C and 303-306 degrees C, respectively. Gas permeability analysis of films of PI-IEs and PI-IMs was investigated by variable-volume method and it was observed that incorporation of ionic groups into PI-6FDA resulted in increased permeability while maintaining selectivity. In particular, polymer bearing Tf2N- anion exhibited high CO2 permeability (33.3 Barr) and high selectivity for CO2/CH4 (41.1) and CO2/N-2 (35.4). (c) 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1721-17291 aShrimant, Bharat1 aKharul, Ulhas, K.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/design-synthesis-and-gas-permeation-properties-polyimides-containing-pendent-imidazolium