ZnxCo3‐xO4 nanoarrays are grown hydrothermally on Ti foils using appropriate ratios of Zn(NO3)2 and Co(NO3)2, NH4F and Co(NH2)2 in H2O together with the Ti substrate (autoclave, 120 °C, 10 h).

Transparent and conductive film based electronics have attracted substantial research interest in various wearable and integrated display devices in recent years. The breakdown of transparent electronics prompts the development of transparent electronics integrated with healability. A healable transparent chemical gas sensor device is assembled from layer-by-layer-assembled transparent healable polyelectrolyte multilayer films by developing effective methods to cast transparent carbon nanotube (CNT) networks on healable substrates. The healable CNT network-containing film with transparency and superior network structures on self-healing substrate is obtained by the lateral movement of the underlying self-healing layer to bring the separated areas of the CNT layer back into contact. The as-prepared healable transparent film is assembled into healable transparent chemical gas sensor device for flexible, healable gas sensing at room temperature, due to the 1D confined network structure, relatively high carrier mobility, and large surface-to-volume ratio. The healable transparent chemical gas sensor demonstrates excellent sensing performance, robust healability, reliable flexibility, and good transparency, providing promising opportunities for developing flexible, healable transparent optoelectronic devices with the reduced raw material consumption, decreased maintenance costs, improved lifetime, and robust functional reliability.

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The halide solid‐state electrolytes (SSEs) have received significant attention due to their high ionic conductivity and desirable compatibility with cathode materials. However, the reduction potential of the halide is still >0.6 V (versus Li/Li+). Reduction stability is still one of the challenges that need to be addressed. The fluorides have a wide electrochemical stability window due to the large electronegativity of F–. In contrast, Li3YBr6 (LYB) bromides have a narrower electrochemical window, although they have high lithium ion conductivity (>10–3 S cm–1). Herein, a fluorine doping strategy is employed. The interfacial stability between fluoride‐doped bromides and lithium metal is researched by cycling of lithium symmetric cells. Li plating/stripping can maintain over 1000 h at 0.75 mA cm–2. Interfacial protection mechanisms investigated by X‐ray photoelectron spectroscopy. A fluoride‐rich interfacial layer is formed in situ during the cycle, which achieves inhibition of the reduction. The Li metal treated fluorine doping of LYB exhibits significant potential in full cells. In fact, the induction of a stable in situ interfacial layer by fluorine doping can effectively improve the interfacial stability of bromides to lithium metal. Fluorine‐doped modification offers a new attempt to realize lithium metal applications in all‐solid‐state lithium batteries.

In this work, we report a new and efficient red phosphor BaGeF 6 :Mn 4+ (denoted as BGFM) by hydrothermally etching BaCO 3 and GeO 2 in HF solution with an optimized KMnO 4 concentration. The crystal structure and morphology were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) in details. The influence of synthesis conditions on its photoluminescent (PL) properties has been investigated comprehensively. It can present a broad adsorption and sharp emissions in blue and red ranges respectively. The white LED device made of blue GaN chip merged with YAG:Ce-BGFM mixture presents warmer white light than that merged with only one YAG:Ce component.

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Hierarchical ZnxCo3-xO4 Nanoarrays with High Activity for Electrocatalytic Oxygen Evolution. -Zn x Co 3-x O 4 nanoarrays are grown hydrothermally on Ti foils using appropriate ratios of Zn(NO3)2 and Co(NO3)2, NH4F and Co(NH2)2 in H2O together with the Ti substrate (autoclave, 120°C, 10 h). High O2 evolution reaction (OER) performance is achieved from these nanostructures which consist of small secondary nanoneedles grown on primary rhombus-shaped pillar arrays. The nanostructures show a large roughness, high porosity, and a high density of active sites. The samples produced from a 1:3 mixture of Zn(NO3)2 and Co(NO3)2 exhibits a small overpotential of ≈0.32 V at a current density of 10 mA/cm 2 and a Tafel slope of 51 mV/decade. The nanostructures perform significantly better than pure Co3O4 and a commercial Ir/C catalyst and belong to the best OER catalysts reported for alkaline media indicating that they are promising water splitting electrodes. -(LIU, X.; CHANG, Z.; LUO, L.; XU, T.; LEI, X.; LIU*, J.; SUN, X.; Chem. Mater. 26 (2014) 5, 1889-1895, http://dx.doi.org/10.1021/cm4040903 ; State Key Lab. Chem. Resour. Eng., Beijing Univ.

Structural design and catalyst screening are two most important factors for achieving exceptional electrocatalytic performance. Herein we demonstrate that constructing a three-dimensional (3D) porous Ni-Cu alloy film is greatly beneficial for improving the hydrazine oxidation reaction (HzOR) performance. A facile electrodeposition process is employed to synthesize a Ni-Cu alloy film with a 3D hierarchical porous structure. As an integrated electrode for HzOR, the Ni-Cu alloy film exhibits superior catalytic activity and stability to the Ni or Cu counterparts. The synthesis parameters are also systematically tuned for optimizing the HzOR performance. The excellent HzOR performance of the Ni-Cu alloy film is attributed to its high intrinsic activity, large electrochemical specific surface area, and 3D porous architecture which offers a "superaerophobic" surface to effectively remove the gas product in a small volume. It is believed that the Ni-Cu alloy film electrode has potential application in direct hydrazine fuel cells as well as other catalytic fields.