Abstract
Zwitterionic p-aminobenzoate ion intercalated α-hydroxides of nickel and cobalt exfoliate in water. The hydroxide monolayers of nickel and cobalt could be co-stacked from a mixture of their colloidal dispersions by the addition of excess of nitrate ions resulting in hybrids in which the layers of the two hydroxides were randomly co-stacked. The α-hydroxide hybrids were explored for their potential as supercapacitor electrode materials. The specific capacitance of hybrids vary with [Ni]/[Co] ratio and a maximum capacitance of 990Fg−1 (at a current density of 1Ag−1) with good cycling stability was obtained for the hybrid with [Ni]/[Co]=4.
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