01964nas a2200229 4500008004100000022001400041245015200055210006900207260007100276300001400347490000600361520098900367653002301356653003001379653003401409653003501443653004201478100003001520700003101550700002501581856012801606 2016 eng d a2168-048500aRuO2 center dot nH(2)O nanoparticles anchored on carbon nano-onions: an efficient electrode for solid state flexible electrochemical supercapacitor0 aRuO2 center dot nH2O nanoparticles anchored on carbon nanoonions a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY a2528-25340 v43 a

A flexible solid state electrochemical capacitor based on hydrous RuO2 nanoparticles, supported onto the nonporous and highly accessible ion adsorptive carbon nano onions (CNOs), is fabricated in a novel process of modifying a conducting carbon paper to a flexible conducting substrate, separated with a poly(vinyl alcohol)/H2SO4 gel electrolyte. The sol-gel technique tends to form homogeneously dispersed RuO2 nanoparticles with the average size of similar to 2.3 nm on the positive surface curvatures of multilayer fullerene (CNOs), which helps the high diffusivity of ions in both the aqueous and solid state gel electrolytes. The flexible substrate worked excellently as an electrical conductor as well as a stable mechanical support. This solid state flexible energy storage device showed a maximum energy density of 10.62 Whkg(-1) and a maximum power density of 4.456 kWkg(-1) for the hydrous RuO2/CNOs nanocomposite with 94.47% cycling stability even after 4000 cycles.

10aCarbon nano-onions10aElectrochemical capacitor10aFlexible conducting substrate10aFlexible energy storage device10aHydrous ruthenium oxide nanoparticles1 aMuniraj, Vedi, Kuyil Azha1 aKamaja, Chaitanya, Krishna1 aShelke, Manjusha, V. uhttps://library.ncl.res.in/content/ruo2-center-dot-nh2o-nanoparticles-anchored-carbon-nano-onions-efficient-electrode-solid01980nas a2200241 4500008004100000022001400041245013400055210006900189260000800258300001400266490000600280520109300286653002101379653002501400653002901425653002201454653002801476100002801504700003001532700002901562700002501591856012201616 2018 eng d a2365-654900aNi(OH)(2)-Fe2O3/CNOs ternary nanocomposite designed as an anode with complementary properties for high-performance li-ion battery0 aNiOH2Fe2O3CNOs ternary nanocomposite designed as an anode with c cFEB a2286-22920 v33 a

Synthesis of the new ternary hybrid composite with excellent electrochemical performances for Li-ion battery is demonstrated. The ternary hybrid composite of Ni(OH)(2)-Fe2O3/Carbon Nano Onions (NFOC) is synthesized by using two-step solution phase method delivers a high reversible discharge capacity of 928 mAhg(-1) at 50 mAg(-1) and 673 mAhg(-1) at a higher current density of 1000 mAg(-1) with excellent rate performance. Additionally, it shows to have stable cycle life up to 1000 cycles with 96% capacity retention and more than 99% of coulombic efficiency. The synergetic effect between Ni(OH)(2), Fe2O3 and carbon nano onions (CNOs) as well as the unique feature of heterostructures are responsible for the improved electrochemical performance of the battery. The reversible reaction of Fe2O3 and Ni(OH)(2) with Li, maintains its long cycle life with higher reversible discharge capacity and CNOs improve the efficient electronic transfer, accommodate substantial volume expansion and maintain the structural integrity of the material during lithiation-delithiation process.

10aHeterostructures10aLong cycle stability10aSuperior rate capability10aTernary Composite10aTransition metal oxides1 aDwivedi, Pravin, Kumari1 aMuniraj, Vedi, Kuyil Azha1 aDevarapalli, Rami, Reddy1 aShelke, Manjusha, V. uhttps://library.ncl.res.in/content/nioh2-fe2o3cnos-ternary-nanocomposite-designed-anode-complementary-properties-high02818nas a2200265 4500008004100000022001400041245018000055210006900235260000900304300001600313490000700329520179300336653002502129653002102154653002002175653004002195653002202235100003002257700002802287700003202315700002202347700002302369700002802392856013202420 2019 eng d a1944-824400aHigh-energy flexible supercapacitor-synergistic effects of polyhydroquinone and RuO2 center dot xH(2)O with microsized, few-layered, self-supportive exfoliated-graphite sheets0 aHighenergy flexible supercapacitorsynergistic effects of polyhyd cMAY  a18349-183600 v113 a

An effective and straightforward route for tailoring the self-supporting, exfoliated flexible graphite substrate (E-FGS) using electrochemical anodization is proposed. E-FGS has essential features of highly exfoliated, few-layered, two-dimensional graphite sheets with the size of several tens of micrometers, interconnected along the axis of the substrate surface. The novel hierarchical porous structural morphology of E-FGS enables large active sites for efficient electrolyte ion and charge transport when used as electrode material for a supercapacitor. In order to effectively utilize this promising E-FGS electrode for energy storage purpose, a ternary composite is further synthesized with pseudocapacitive polyhydroquinone (PHQ) and hydrous RuO2 (hRO). hRO is synthesized via a sol-gel route, while electropolymerization is utilized for the electrodeposition of PHQ over E-FGS. Ultimately, the fabricated self-supporting E-FGS-based flexible supercapacitor is capable of delivering areal specific capacitance values as high as 378 mF cm(-2) at a current density of 1 mA cm(-2). Addition of the pseudocapacitive component to the E-FGS texture leads to similar to 10 times increase of the electrochemical charge storage capability. The imposition of mechanical forces to this flexible supercapacitor device results in trivial changes in electrochemical properties and is still capable of retaining 91% of the initial specific capacitance after 10 000 cycles. Alongside, the fabricated symmetrical solid-state flexible device exhibited a high energy density of 8.4 mu Wh cm(-2). The excellent performance along with the ease of synthesis and fabrication process of the flexible solid-state supercapacitor device using PHQ/hRO/E-FGS holds promise for large-scale production.

10agraphite exfoliation10apolyhydroquinone10aruthenium oxide10asolid-state flexible supercapacitor10aTernary Composite1 aMuniraj, Vedi, Kuyil Azha1 aDwivedi, Pravin, Kumari1 aTamhane, Parikshit, Shivaji1 aSzunerits, Sabine1 aBoukherroub, Rabah1 aShelke, Manjusha, Vilas uhttps://library.ncl.res.in/content/high-energy-flexible-supercapacitor-synergistic-effects-polyhydroquinone-and-ruo2-center-dot02417nas a2200229 4500008004100000022001400041245017300055210006900228260000800297300001400305490000600319520152300325653002301848653002701871653002401898653002801922653002601950100003001976700002302006700002802029856013002057 2020 eng d a2168-048500aFlexible energy storage device based on poly(N-phenylglycine), an incentive-energy pseudocapacitive conducting polymer, and electrochemically exfoliated graphite sheets0 aFlexible energy storage device based on polyNphenylglycine an in cAPR a6433-64410 v83 a

Poly(N-phenylglycine) (PNPG), an original pseudocapacitive conjugative conducting polymer (CP), was synthesized by the electro-oxidative polymerization method. The synthesis process involves in situ polymerization and electro-deposition of N-phenylglycine onto the surface of highly conductive, few-layered, exfoliated flexible graphite sheets (EFGSs). At first, the promising features of the conjugative structure of the as-prepared protonated PNPG were thoroughly investigated by UV-vis absorption spectrophotometry, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy analysis. The protonated nitrogen groups facilitate the rapid accessibility of counter ions from the electrolyte. Electrochemical studies revealed that the PNPG/E-FGS electrode exhibits an extraordinary areal specific capacitance of 367 mF cm(-2) at 10 mV s(-1). A flexible solid-state symmetrical supercapacitor was further fabricated using PNPG/E-FGS electrodes, exhibiting a specific capacitance as high as 199 mF cm(-2) at 1 mA cm(-2) with an operating voltage of 1.1 V. Furthermore, the device delivered an excellent specific energy of 8.36 mu W h cm(-2) at a power density of 1.65 mW cm(-2) in a working potential window of 1.1 V. More significantly, the energy density was nearly doubled to 16.1 mu W h cm(-2) upon extending the potential window from 1.1 to 1.5 V. The extremely redox-active CP electrode is highly suitable for applications in high-energy electrochemical capacitors with wide operating potential window.

10aconducting polymer10aelectro-polymerization10aexfoliated graphite10aflexible supercapacitor10apoly(N-phenylglycine)1 aMuniraj, Vedi, Kuyil Azha1 aBoukherroub, Rabah1 aShelke, Manjusha, Vilas uhttps://library.ncl.res.in/content/flexible-energy-storage-device-based-polyn-phenylglycine-incentive-energy-pseudocapacitive