Effect of morphology on supercapacitive properties of chemically grown β-Ni(OH)2 thin films

Different nanostructures of beta-Ni(OH)(2) have been successfully developed using simple chemical bath deposition (CBD) method from different nickel precursors. Effect of different nickel precursors on structural, morphological and supercapacitive properties of beta-Ni(OH)(2) thin films have been investigated. The formation of nanocrystallinity and beta-phase of Ni(OH)(2) are confirmed by X-ray diffraction and Flu studies. Scanning electron microscope study revealed the formation of multilayer nanosheets, up grown nanofalkes and interconnected, macroporous; honeycomb-like structures of beta-Ni(OH)(2) films. BET analyses showed that nanoflakes and honeycomb like structure have high surface area of 75 and 65 m(2) g(-1) with micro and mesopores network. The electrochemical supercapacitor properties of the beta-Ni(OH)(2) films are examined using cyclic voltammetry (CV) and galvanostatic charge discharge studies. The beta-Ni(OH)(2) films showed pseudocapacitive behavior with maximum supercapacitance of 462 F g(-1) in 2 M KOH electrolyte, suggesting its potential application in electrochemical supercapacitors. (c) 2011 Elsevier Inc. All rights reserved.