Journal
RSC ADVANCES
Volume 4, Issue 59, Pages 31219-31225Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra04281f
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- CSIR Govt. of India, New Delhi [01/2532/11/EMR-II]
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Cobalt hydroxide with or without adding urea was potentiodynamically synthesized from a nitrate bath, and the resultant hydroxides were examined as electrode material for supercapacitor applications. The deposited hydroxides were characterized by X-ray diffraction, field-emission scanning electron microscopy and Fourier transformed infra-red spectroscopy. With urea in the nitrate bath, the specific capacitance of Co(OH)(2) could be tuned from 700 F g(-1) to 1200 F g(-1) at a current of 0.5 mA. It was shown that the addition of just 2 wt% urea in the nitrate bath had a strong influence on the supercapacitor performance, exhibiting the highest specific capacitance of 1200 F g(-1). The high-performance of the urea-doped Co( OH)(2) was attributed to the better access of electrolyte due to well-stabilized basal length.
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