tailieunhanh - Chemical Physics Letters

This Letter reports a preparation of Ni(OH)2/CNTs nanoflake composites for supercapacitor applications. The composites were synthesized using a facile and cost-effective chemical precipitation method. | Chemical Physics Letters 601 (2014) 168–173 Contents lists available at ScienceDirect Chemical Physics Letters journal homepage: Facile synthesis and advanced performance of Ni(OH)2/CNTs nanoflake composites on supercapacitor applications Hanlin Cheng, Aldwin D. Su, Siheng Li, Son T. Nguyen, Li Lu, Christina . Lim, Hai M. Duong ⇑ Department of Mechanical Engineering, National University of Singapore, 117576, Singapore a r t i c l e i n f o a b s t r a c t This Letter reports a preparation of Ni(OH)2/CNTs nanoflake composites for supercapacitor applications. The composites were synthesized using a facile and cost-effective chemical precipitation method. Compared with the pure nickel hydroxides, the Ni(OH)2/CNTs nanocomposite exhibits a much better electrochemical performance with a specific capacitance of 720 F/g at 1 A/g. The enhanced performance can be attributed to a synergetic effect of hydroxides and CNTs with better electrical conductivity and more porous structure to facilitate both ion and charge transport. Ó 2014 Elsevier . All rights reserved. Article history: Received 21 January 2014 In final form 26 March 2014 Available online 13 April 2014 1. Introduction With the coming depletion of the traditional fossil fuels and the raise of environmental contamination as well as global warming, great attention has been paid to the development of sustainable energy sources such as solar, wind and tidal energy [1]. Although they are helpful to the local harvest, the fluctuation output nature of these energy sources makes them difficult to be incorporated into the current power system. In order to better utilize these energy sources with a higher efficiency, smart grids composed of various energy storage devices are purposed [2]. Supercapacitor is one of promising candidates for such energy storage devices due to their high power density, moderate energy density, long cycling life and low maintenance cost [3]. Generally, superapacitors .