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

2011; Elsevier BV; Volume: 151; Linguagem: Inglês

10.1016/j.micromeso.2011.08.034

1873-3093

Deepak P. Dubal, V.J. Fulari, C.D. Lokhande,

Catalytic Processes in Materials Science

Different nanostructures of β-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 β-Ni(OH)2 thin films have been investigated. The formation of nanocrystallinity and β-phase of Ni(OH)2 are confirmed by X-ray diffraction and FTIR studies. Scanning electron microscope study revealed the formation of multilayer nanosheets, up grown nanofalkes and interconnected, macroporous; honeycomb-like structures of β-Ni(OH)2 films. BET analyses showed that nanoflakes and honeycomb like structure have high surface area of 75 and 65 m2 g−1 with micro and mesopores network. The electrochemical supercapacitor properties of the β-Ni(OH)2 films are examined using cyclic voltammetry (CV) and galvanostatic charge discharge studies. The β-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.