Search

Herein, hybrid Cu/Ni-based hexagonal rods were obtained through a competing reaction of dimethylglyoxime with copper acetate and nickel acetate. Using Cu2+ to intervene the coordination equilibrium between Ni2+ and dimethylglyoxime, the length of the rods was altered; moreover, the coordination environments were investigated by adjusting the concentration of Cu2+ and replacing the solvent. The decomposition products porous NiO and CuO/NiO were directly employed as SC electrodes. The CuO/NiO electrode delivered higher specific capacitance and energy with more excellent energy deliverable ability and better cycling stability than the pristine NiO electrode. After 2000 continuous cycles, the capacitance retention of the as-synthesized CuO/NiO electrode was 87.9%. The maximum specific capacitance and energy delivery efficiency of the CuO/NiO electrode were 344 F g−1 and 93.5%, respectively, at a current density of 0.625 A g−1. The better performance of the hybrid sample was mainly due to higher surface area, lower charge-transfer resistance, and possible synergistic effect. Furthermore, MgO/NiO nanoparticles were synthesized and compared to confirm the existence of a synergistic effect. [ABSTRACT FROM AUTHOR]

Hierarchically micro-/nanostructured coordination polymer[Cu(2,5-PDC)H2O]narchitectureswith tunablemorphologies have been successfully prepared by rationally adjustingthe preparation parameters, such as the reactant concentration, solvent,surfactant, and reaction temperature. Using simple calcinations ofchosen shaped [Cu(2,5-PDC)H2O]narchitectures, we can obtain several porous copper-based inorganicmotifs, which show potential applications for the antibacterial fieldand lithium ion batteries. Therein, CuO-1 can kill the Gram-positivebacteria Bacillus subtilis and Staphylococcus aureusbetter than other materials. The value for initial discharge capacityof CuO-3 (1160 mAh g–1) is higher than the theoreticalcapacity (674 mAh g–1) and most copper oxide materials.Besides, Cu/C composites also show intense application in the antibacterialand Li-ions uptake-release field, which will provide a widely usedmethod to prepare the nanosystem of carbon-coating or carbon-compositingmaterials by simple calcinations of shaped precursor coordinationpolymer particles used under the proper temperature. [ABSTRACT FROM AUTHOR]