Journal
BULLETIN OF MATERIALS SCIENCE
Volume 37, Issue 1, Pages 27-33Publisher
INDIAN ACAD SCIENCES
DOI: 10.1007/s12034-014-0617-x
Keywords
Ni(OH)(2); chemical bath deposition; structural analysis; surface morphology; supercapacitive behaviour
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Funding
- National Research Foundation of Korea [2009-0093823] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Nanostructured Ni(OH)(2) thin films were deposited over stainless steel (SS) and glass substrate via simple chemical bath deposition (CBD) method. NiCl2:6H(2)O were used as source of nickel and aqueous ammonia as a complexing agent. The coating process of Ni(OH)(2) material over substrate is based on the decomposition of ammonia complexed nickel ions at two different bath temperatures. The changes in structural, morphological and electrochemical properties are examined as an impact of bath temperature. XRD studies reveal formation of mixed phase of alpha and beta at lower bath temperature (313 K) while, pure beta phase of Ni(OH)(2) thin films deposited was observed at higher bath temperature (353 K). The morphological evolution from honeycomb structure to vertically aligned flakes over the substrate is observed as the influence of bath temperature. The supercapacitive performance based on the morphology examined by using cyclic voltammetric measurements in 1 M KOH. The maximum specific capacitances of 610 and 460 F/g were observed for the vertical flake and honeycomb structured Ni(OH)(2) thin films, respectively.
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