02301nas a2200277 4500008004100000022001400041245013200055210006900187260007100256300001600327490000600343520126900349653002001618653002201638653002301660653001601683653002201699653001901721100002501740700002401765700002801789700002501817700002501842700002401867856013201891 2013 eng d a1944-824400aDesign of a high performance thin all-solid-state supercapacitor mimicking the active interface of its liquid-state counterpart0 aDesign of a high performance thin allsolidstate supercapacitor m a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC a13397-134040 v53 a

Here we report an all-solid-state supercapacitor (ASSP) which closely mimics the electrode-electrolyte interface of its liquid-state counterpart by impregnating polyaniline (PANO-coated carbon paper with polyvinyl alcohol-H2SO4 (PVA-H2SO4) gel/plasticized polymer electrolyte. The well penetrated PVA-H2SO4 network along the porous carbon matrix essentially enhanced the electrode-electrolyte interface of the resulting device with a very low equivalent series resistance (ESR) of 1 Omega/cm(2) and established an interfacial structure very similar to a liquid electrolyte. The designed interface of the device was confirmed by cross-sectional elemental mapping and scanning electron microscopy (SEM) images. The PANI in the device displayed a specific capacitance of 647 F/g with an areal capacitance of 1 F/cm(2) at 0.5 A/g and a capacitance retention of 62% at 20 A/g. The above values are the highest among those reported for any solid-state-supercapacitor. The whole device, including the electrolyte, shows a capacitance of 12 F/g with a significantly low leakage current of 16 mu A(2). Apart from this, the device showed excellent stability for 10000 cycles with a coulombic efficiency of 100%. Energy density of the PANI in the device is 14.3 Wh/kg.

10aall-solid-state10acyclic voltametry10aimpedance analysis10apolyaniline10apolyvinyl alcohol10asupercapacitor1 aAnothumakkool, Bihag1 aTorris, Arun, A. T.1 aBhange, Siddheshwar, N.1 aUnni, SreeKuttan, M.1 aBadiger, Manohar, V.1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/design-high-performance-thin-all-solid-state-supercapacitor-mimicking-active-interface-its-001743nas a2200277 4500008004100000022001400041245014200055210006900197260007100266300001400337490000600351520069700357653002201054653002301076653003101099653001401130653002401144653001901168100002501187700002401212700002101236700002701257700002501284700002401309856013201333 2016 eng d a1944-824400aHigh-Performance flexible solid-state supercapacitor with an extended nanoregime interface through in situ polymer electrolyte generation0 aHighPerformance flexible solidstate supercapacitor with an exten a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcJAN a1233-12410 v83 a

{Here, we report an efficient strategy by which a significantly enhanced electrodeelectrolyte interface in an electrode for supercapacitor application could be accomplished by allowing in situ polymer gel electrolyte generation inside the nanopores of the electrodes. This unique and highly efficient strategy could be conceived by judiciously maintaining ultraviolet-triggered polymerization of a monomer mixture in the presence of a high-surface-area porous carbon. The method is very simple and scalable, and a prototype, flexible solid-state supercapacitor could even be demonstrated in an encapsulation-free condition by using the commercial-grade electrodes (thickness = 150 mu m

10acyclic voltametry10aimpedance analysis10ain situ polymer generation10ainterface10apolymer electrolyte10asupercapacitor1 aAnothumakkool, Bihag1 aTorris, Arun, A. T.1 aVeeliyath, Sajna1 aVijayakumar, Vidyanand1 aBadiger, Manohar, V.1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/high-performance-flexible-solid-state-supercapacitor-extended-nanoregime-interface-through-002522nas a2200253 4500008004100000022001400041245015300055210006900208260000800277300001200285490000700297520158900304653004001893653003801933653002601971653001601997653001902013653002102032100001502053700002402068700002002092700002402112856013202136 2018 eng d a1944-824400aRealizing high capacitance and rate capability in polyaniline by enhancing the electrochemical surface area through induction of superhydrophilicity0 aRealizing high capacitance and rate capability in polyaniline by cJAN a676-6860 v103 a

Polyaniline (PANI) as a pseudocapacitive material has very high theoretical capacitance of 2000 F g(-1). However, its practical capacitance has been limited by low electrochemical surface area (ESA) and unfavorable wettability toward aqueous electrolytes. This work deals with a strategy wherein the high ESA of PANI has been achieved by the induction of superhydrophilicity together with the alignment of PANI exclusively on the surface of carbon fibers as a thin layer to form a hybrid assembly. Superhydrophilicity is induced by electrochemical functionalization of the Toray carbon paper, which further induces superhydrophilicity to the electrodeposited PANI layer on the paper, thereby ensuring a high electrode-electrolyte interface. The Toray paper is electrochemically functionalized by the anodization method, which generates a highly active electrochemical surface as well as greater wettability (superhydrophilic) of the carbon fibers. Because of the strong interaction of anilinium chloride with the hydrophilic carbon surface, PANI is polymerized exclusively over the surface of the fibers without any appreciable aggregation or agglomeration of the polymer. The PANI-Toray paper assembly in the solid-state prototype supercapacitor can provide a high gravimetric capacitance of 1335 F g(-1) as well as a high areal capacitance of 1.3 F cm(-2) at a current density of 10 A g(-1). The device also exhibits high rate capability, delivering 1217 F g(-1) at a current density of 50 A g(-1) and a high energy density of 30 W h kg(-1) at a power density of 2 kW kg(-1).

10aelectrochemical active sulfate area10aelectrochemical functionalization10aelectropolymerization10apolyaniline10asupercapacitor10asuperhydrophilic1 aSoni, Roby1 aKashyap, Varchaswal1 aNagaraju, Divya1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/realizing-high-capacitance-and-rate-capability-polyaniline-enhancing-electrochemical-surface02021nas a2200253 4500008004100000022001400041245012600055210006900181260000900250300001400259490000600273520118000279653002001459653001001479653001901489653001901508653001601527100001501543700002801558700001501586700001901601700002401620856012301644 2019 eng d a2196-021600aSynthesis of ultrathin PEDOT on carbon nanotubes and shear thinning xanthan Gum-H2SO4 gel electrolyte for supercapacitors0 aSynthesis of ultrathin PEDOT on carbon nanotubes and shear thinn cMAR  a1861-18690 v63 a

Resistance of the electrode material play a vital role for applications in supercapacitors, where lowering the resistance leads to improved performance. Poly(3,4-ethylene dioxythiophene) (PEDOT) possesses high theoretical conductivity; however, the high density of grain boundaries, low accessible surface area, and low rate capability have been pervasive issues affecting the PEDOT-based supercapacitors. To this end, a hydrothermal method is proposed in this work where oxygen functional groups incorporated on the surface of carbon nanotubes (CNTs) are utilized to polymerize 3,4-ethylenedioxythiophene (EDOT). PEDOT forms an ultrathin, well-aligned coating on the surface of CNTs. This arrangement minimizes the number of grain boundaries and increases the electrochemically active surface area. Additionally, a shear-thinning Xanthan gum-H2SO4 gel electrolyte is introduced to overcome the low impregnation of the conventional polyvinyl-based electrolyte due to the hydrophobicity of the CNT-PEDOT composite. A supercapacitor based on this material showed a very low Equivalent Series Resistance (ESR) of 0.31 which leads to a high power density of 74 W cm(-3).

10agel electrolyte10aPEDOT10ashear thinning10asupercapacitor10axanthan gum1 aSoni, Roby1 aBhange, Siddheshwar, N.1 aAthira, E.1 aChetry, Rashmi1 aKurungot, Sreekumar uhttps://library.ncl.res.in/content/synthesis-ultrathin-pedot-carbon-nanotubes-and-shear-thinning-xanthan-gum-h2so4-gel02005nas a2200253 4500008004100000022001400041245016400055210006900219260000800288300001100296490000700307520111200314653001201426653002001438653002001458653002301478653001901501100001701520700001701537700002201554700002401576700002201600856012901622 2021 eng d a2352-152X00aBiomass-derived activated carbon material from native European deciduous trees as an inexpensive and sustainable energy material for supercapacitor application0 aBiomassderived activated carbon material from native European de cFEB a1021780 v343 a

Activated carbons are one of the possible electrode materials for supercapacitors (SCs), which are widely used in commercial applications. Herein, we reported the synthesis of a novel activated carbon derived through a cavitation process from the mixture of native European deciduous trees, Birch, Fagaceae, and Carpinus betulus (commonly known as European hornbeam), which was employed as the electrode material in SC. From the morphological and structural characterization, we observed that the prepared sample is a desirable carbon with good porosity and high specific surface area of about 614 m(2) g(-1). The electrochemical properties of the synthesized material were evaluated with a three-electrode configuration in 1.0 M H2SO4 electrolyte. It was found that in device mode, the carbon material delivers a specific capacitance of 24 F g(-1) at 0.25 A g(-1) with excellent cycling stability of over 10000 consecutive charge/discharge cycles. Thus, our studies demonstrate the facile synthesis of biomass-derived carbon and its application as a versatile electrode material for SC applications.

10aBiomass10aCarbon material10aDeciduous trees10aElectrode material10asupercapacitor1 aJain, Amrita1 aGhosh, Meena1 aKrajewski, Marcin1 aKurungot, Sreekumar1 aMichalska, Monika uhttps://library.ncl.res.in/content/biomass-derived-activated-carbon-material-native-european-deciduous-trees-inexpensive-and