Reducing the high charging overpotential of nonaqueous Li−O 2 batteries is very important for their energy storage ability. Herein, we propose a newly photoassisted Li− O 2 battery system, in which a WO 3 nanowires array that grows on carbon textile serves as a photocatalyst on the cathode. Because of its abundant holes excited by visible light, the Li 2 O 2 coated on WO 3 nanowires can be efficiently oxidized during the charging process, resulting in the reduced charging potential and enhanced Li−O 2 battery performance. Notably, the charging potential can still maintain at 3.55 V even after 100 cycles in this photoassisted battery system, which is much lower than that of the dark state (4.4 V). These positive results indicate that the introduction of WO 3 nanowires array photocatalyst provides possibilities in improving the energy conversion efficiency of the Li−O 2 battery.

A reticular 3D heterometallic metal-organic framework (MOF), [Cu4Na(Mtta)5(CH3CN)]n () (N% = 40.08%), has been synthesized, using a 5-methyl tetrazole (Mtta) ligand formed from acetonitrile and azide, through in situ synthesis and structurally characterized by X-ray single crystal diffraction. The fluorescence spectra demonstrate that undergoes an interesting structural transformation in aqueous solution, yielding the compound [Cu4Na(Mtta)5H2O]n () as confirmed by (1)H NMR, IR and PXRD. Thermoanalysis showed that possesses excellent thermostability up to 335 °C. The calculated detonation properties and the sensitivity test illustrate that compound could be used as a potential explosive. In addition, the non-isothermal kinetics for were studied using the Kissinger and Ozawa-Doyle methods. The enthalpy of formation was obtained from the determination of the constant-volume combustion energy.

The modification of semiconductor photoanode is a reliable approach to enhance its water oxidation property. In this study, a BiVO 4 nanoplate array photoanode is prepared via hydrothermal method, and the BiVO 4 /Ag 3 PO 4 heterojunction is constructed on electron-dominant crystal faces and holedominant crystal faces of BiVO 4 via different deposition methods, respectively. The hole-dominant crystal face is in favor of the transfer and reaction of holes, while the electron-dominant face is benefit for electrons. Compared with pristine BiVO 4 photoanode, the performance of heterojunction photoanode based on the hole-dominant crystal face exhibits a significant increase, while that of electron-dominant face only shows a slight increase. It is demonstrated that the heterojunction on the hole-dominant face exhibits better performance, which is because the hole-dominant face can facilitate the separation of photo-generated holes and electrons more effectively than the electron-dominant face. This approach provides a new strategy to reasonably fabricate efficient heterojunction on photoanodes.