Lamellar-crossing-structured Ni(OH)2/CNTs/Ni(OH)2 nanocomposite for electrochemical supercapacitor materials

Ni(OH)(2)/CNTs/Ni(OH)(2) lamellar-crossing-nanostructure with a single lamellar spacing of similar to 5 nm was effectively constructed through two-phase-interface reaction process followed by the CNTs crossed among the lamellar-nanostructured Ni(OH)(2). The resultant nanocomposite can offer large active surface areas and short diffusion paths for electrons and ions, and is investigated as a potential pseudocapacitor electrode material for electrochemical energy storage applications. Electrochemical data demonstrate that the as-prepared nanocomposite exhibits a high specific capacitance of similar to 1600 F g(-1) at the scan rate of 1 mV s(-1) in 6 M KOH solution at normal pressure and temperature, which is great higher than Ni(OH)(2) (similar to 1200 F g(-1)). Furthermore, Ni(OH)(2)/CNTs/Ni(OH)(2) nanocomposite shows a higher energy density (similar to 125 Wh kg(-1), 2 A g(-1)) and has a slightly decrease of 5% in specific capacitance after 1000 continuous charge/discharge cycles. (C) 2015 Elsevier B.V. All rights reserved.