We present a designed synthesis of a functionalized metal-organic framework with hydrophobic and polar functionalities, which exhibits remarkable thermal and chemical stability. The functionality and porosity make it a promising candidate for the electrode material in Li-ion batteries.

A facile two-step strategy is adopted to construct free-standing composite paper of MnO2 nanoflakes/polyaniline (PANI) nanorods hybrid nanostructures on reduced graphene oxide (RGO) for flexible supercapacitor electrode application.MnO2 nanoflakes are firstly grown on RGO paper via electrodeposition method, followed by assembly of PANI nanorods between MnO2 nanoflakes by in situ polymerization using camphorsulfonic acid as dopant. The morphology and structure of composite paper are characterized and the electrochemical properties are systematically investigated. The interconnected PANI nanorods deposited on the interlaced MnO2 nanoflakes have a length of ~100 nm and diameter of ~30 nm, creating plenty of open porous structures which are beneficial for ion penetration into the electrode. The RGO/MnO2/PANI composite paper shows a large specific capacitance of 636.5 F g -1 at 1.0 A g -1 in 1.0 M Na2SO4 electrolyte and excellent cycling stability (85% capacitance retention after 10 4 cycles). The optimized composite structure with more electroactive sites, fast ion and electron transfer, and strong structural integrity endows the ternary composite paper electrode with outstanding electrochemicalperformance.

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Nanoengineered copper foam with 3D free-standing CuO nanowires is used for enhanced pseudocapacitance energy storage and electroanalysis of H2O2.