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      Ultrathin mesoporous NiCo2O4 nanosheets supported on Ni foam as advanced electrodes for supercapacitors

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      Author
      Yuan, Changzhou
      Li, Jiaoyang
      Hou, Linrui
      Zhang, Xiaogang
      Shen, Laifa
      Lou, David Xiong Wen
      Date of Issue
      2012
      School
      School of Chemical and Biomedical Engineering
      Abstract
      A facile two-step method is developed for large-scale growth of ultrathin mesoporous nickel cobaltite (NiCo2O4) nanosheets on conductive nickel foam with robust adhesion as a high-performance electrode for electrochemical capacitors. The synthesis involves the co-electrodeposition of a bimetallic (Ni, Co) hydroxide precursor on a Ni foam support and subsequent thermal transformation to spinel mesoporous NiCo2O4. The as-prepared ultrathin NiCo2O4 nanosheets with the thickness of a few nanometers possess many interparticle mesopores with a size range from 2 to 5 nm. The nickel foam supported ultrathin mesoporous NiCo2O4 nanosheets promise fast electron and ion transport, large electroactive surface area, and excellent structural stability. As a result, superior pseudocapacitive performance is achieved with an ultrahigh specific capacitance of 1450 F g−1, even at a very high current density of 20 A g−1, and excellent cycling performance at high rates, suggesting its promising application as an efficient electrode for electrochemical capacitors.
      Type
      Journal Article
      Series/Journal Title
      Advanced functional materials
      Rights
      © 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
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      • SCBE Journal Articles
      http://dx.doi.org/10.1002/adfm.201200994
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