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Highly optimized nickel cobalt mixed oxide has been derived from zeolite imidazole frameworks. While the pure cobalt oxide gives only 178.7 F g−1 as the specific capacitance at a current density of 1 A g−1, the optimized Ni:Co 1:1 has given an extremely high and unprecedented specific capacitance of 1931 F g−1 at a current density of 1 A g−1, with a capacitance retention of 69.5% after 5000 cycles...
NiOOH nanosheet/graphene hydrogels (H–NiOOH/GS), with mesoporous NiOOH nanosheets uniformly dispersed within the highly interconnected 3D graphene network, are constructed and studied for the first time by a mixed solvothermal and hydrothermal reaction. The effect of solvent composition on the morphology, phase, dispersibility of nanocrystal and hydrogel strength is systematically studied. As binder-free...
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