2015
DOI: 10.1002/celc.201500057
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Vanadium Pentoxide Nanorods Anchored to and Wrapped with Graphene Nanosheets for High‐Power Asymmetric Supercapacitors

Abstract: Asymmetric lithium‐ion supercapacitors have been obtaining great attention, owing to their significantly increased energy density. However, transition‐metal‐oxide‐based electrode materials with poor conductivity and sluggish electrode kinetics often sacrifice power performance and cycling stability. Herein, we report the in situ growth of V2O5 nanorods on highly conductive graphene sheets as anode materials with high specific capacitance and excellent rate capability, which is mainly attributed to the intimate… Show more

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Cited by 31 publications
(23 citation statements)
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“…Li et al. fabricated anode materials for asymmetric supercapacitors of V 2 O 5 nanorods grown on graphene sheets exhibiting appreciable specific capacitance value and splendid rate capability attributed to the synergic effect between V 2 O 5 nanorods and highly conductive graphene sheets . The designed asymmetric supercapacitor with graphene/V 2 O 5 composites as anode and activated carbon as cathode yielded high energy density of approximately 50 Wh kg −1 at a power density of 136.4 W kg −1 , with appreciable capacitance retention efficacy.…”
Section: V2o5‐carbon‐based Compositesmentioning
confidence: 99%
“…Li et al. fabricated anode materials for asymmetric supercapacitors of V 2 O 5 nanorods grown on graphene sheets exhibiting appreciable specific capacitance value and splendid rate capability attributed to the synergic effect between V 2 O 5 nanorods and highly conductive graphene sheets . The designed asymmetric supercapacitor with graphene/V 2 O 5 composites as anode and activated carbon as cathode yielded high energy density of approximately 50 Wh kg −1 at a power density of 136.4 W kg −1 , with appreciable capacitance retention efficacy.…”
Section: V2o5‐carbon‐based Compositesmentioning
confidence: 99%
“…EDLCs store charges at electrode/electrolyte interface through reversible adsorption of ions on the active electrodes ,,. With the rapid development of nanotechnology, carbonaceous nanomaterials such as graphene have been considered as promising candidate as the active materials of EDLCs . The optimal design of such nano‐sized active materials relies on a profound understanding of their functional performance in EDLCs and the insights into the electrode/electrolyte interface …”
Section: Introductionmentioning
confidence: 99%
“…The energy and power densities are two important parameters to determine the device performance. The V‐based colloid//activated carbon asymmetric supercapattery displays a high energy density of 50.4 Wh/kg at a power density of 250 W/kg, which are higher than those of asymmetric V 2 O 5 //AC, CNT/V 2 O 5 nanocomposite//AC, and CNT/V 2 O 5 nanocomposite//MnO 2 /C devices (Figure a) . As shown in Figure b, cell voltage can reach 1.8 V, twice of the conventional carbon‐based supercapacitor in aqueous electrolytes (0.8–1.0 V).…”
Section: Redox Cations In Colloidal Electrodementioning
confidence: 93%