Abstract
AbstractA novel approach for hybridizing nanoporous NiCo oxide flakes with graphene sheets is reported. Positively charged cyano‐bridged CoNi coordination polymer flakes (CoNi‐CP) are mixed with graphene (G) suspension with negatively charged surface. Due to effective electrostatic interaction, both the materials are hybridized to form CoNi‐CP/G composite. The as‐prepared CoNi‐CP/G composite is thermally treated in air, to remove the organic components without affecting the integrity of the parent G sheets. Through the thermal treatment, the CoNi‐CP flakes wrapped into G sheets are converted to NiCo oxide, resulting in a new composite consisting of NiCo oxide flakes and G sheets. The NiCo‐oxide/G composite shows the high specific capacitance (∼ 199 F g‐1) at 5 mV/s, and features the good capacitance retention of ∼68% at 100 mV(∼ 135 F g−1).
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