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We report a facile method to fabricate three-dimensional (3D) porous NiO–NiCo2O4 film on Ni foam substrate through the electrostatic spray deposition (ESD) technique followed by annealing in Ar atmosphere for lithium-ion battery anodes. The structure and morphology of NiO–NiCo2O4 film were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The NiO–NiCo2O4 electrode as a binder-free anode exhibits stable cycling performance with a reversible capacity of over 1466 mAh g−1 after 100 cycles at a current density of 400 mA g−1 and good rate capability. The superior lithium storage performance of the NiO–NiCo2O4 electrode is attributed to the unique porous NiO–NiCo2O4 structures directly deposited on Ni foam, which could provide more effective void space for the volume change, and offer more contact area between the electrolyte and the electrode, and improve the electron transport. [ABSTRACT FROM AUTHOR]

CoMn2O4 films on nickel foam were successfully synthesized by electrostatic spray deposition method followed by annealing in Ar atmosphere for sodium-ion battery anodes. The CoMn2O4 film exhibits porous architecture with a pore size of around 3-4 µm. The CoMn2O4 electrode as a binder-free anode exhibits superior reversible cycling performance and rate capability. It remains reversible specific capacity of 185 mAh g−1 at 100 mA g−1 after 50th cycle. The stable electrochemical performance could be attributed to the unique CoMn2O4 architecture on Ni foam, which could provide high contact area with electrolyte, pronounced tolerance to volume variation, and enhance the electrical conductivity. [ABSTRACT FROM AUTHOR]

TiO-based structure is fabricated on both sides of transparent quartz substrate via a liquid phase deposition method, with the assistance of ZnO nanorod template. The morphology, crystal structure, and photocatalytic property of the double-sided TiO nanotube arrays have been studied and the formation mechanism has been discussed. Importantly, compared to single-sided structure, the double-sided TiO nanotube arrays show remarkable enhancement of photocatalytic activity in degradation of Rhodamine B. [ABSTRACT FROM AUTHOR]