Morphology Engineering of VS Microspheres as High-Performance Cathodes for Hybrid Mg/Li Batteries.

V-based sulfides are considered as potential cathode materials for Mg/Li hybrid ion batteries (MLIBs) due to their high theoretical specific capacities, unique crystal structure, and flexible valence adjustability. However, the formation of irreversible polysulfides, poor cycling performance, and severe structural collapse at high current densities impede their further development. Herein, VS microspheres with various controllable nanoarchitectures were successfully constructed via a facile solvothermal method by adjusting the amount of hydrochloric acid and were used as cathode materials for MLIBs.

Construction of TiO/TiOF heterojunction as a cathode material for high-performance Mg/Li hybrid-ion batteries.

Anatase TiO has attracted significant interest as a cathode material for Mg-ion batteries or Mg/Li hybrid-ion batteries. However, owing to the semiconductor property and slower Mg diffusion kinetics it still suffers from poor electrochemical performance. Herein, a TiO/TiOF heterojunction consisting of in situ formed TiO sheets and TiOF rods, was prepared by adjusting the amount of HF in the hydrothermal process, and used as cathode of Mg/Li hybrid-ion battery.

Short-Range Nanoreaction Effect on the Hydrogen Desorption Behaviors of the MgH-Ni@C Composite.

Doping a catalyst can efficiently improve the hydrogen reaction kinetics of MgH. However, the hydrogen desorption behaviors are complicated in different MgH-catalyst systems. Here, a carbon-encapsulated nickel (Ni@C) core-shell catalyst is synthesized to improve the hydrogen storage properties of MgH.

Supra Hydrolytic Catalysis of Ni Fe/rGO for Hydrogen Generation.

Light metal hydrolysis for hydrogen supply is well suited for portable hydrogen fuel cells. The addition of catalysts can substantially aid Mg hydrolysis. However, there is a lack of clear catalytic mechanism to guide the design of efficient catalysts.

Vacancy-Mediated Hydrogen Spillover Improving Hydrogen Storage Properties and Air Stability of Metal Hydrides.

Hydrogen storage in metal hydrides is a promising solution for sustainable and clean energy carriers. Although Mg-based metal hydrides are considered as potential hydrogen storage media, severe surface passivation has limited their industrial application. In this study, a simple, cheap, and efficient method is proposed to produce highly reactive and air-stable bulk Mg-Ni-based hydrides by rapid treatment with water for 3 min.

Ultrahigh rate capability and long cycling stability of dual-ion batteries enabled by TiO microspheres with abundant oxygen vacancies.

Favourable effects of oxygen vacancies in TiO2-x synthesized via a calcination method on the electrochemical performance of dual Mg/Li-ion batteries are investigated. The dual-ion cell shows excellent rate capabilities up to 40 C and outstanding cyclability up to 2500 cycles.

Magnesium Nanoparticles With Pd Decoration for Hydrogen Storage.

In this work, Magnesium nanoparticles with Pd decoration, ranging from 40 to 70 nm, were successfully coprecipitated from tetrahydrofuran (THF) solution, assigned as the Mg-Pd nanocomposite. The Mg-Pd nanocomposite exhibits superior hydrogen storage properties. For the hydrogenated Mg-Pd nanocomposite at 150°C, the onset dehydrogenation temperature is significantly reduced to 216.

Lithium migration pathways at the composite interface of LiBH and two-dimensional MoS enabling superior ionic conductivity at room temperature.

LiBH is one of the most promising solid electrolyte materials for use in solid-state batteries because its hexagonal phase above 110 °C offers Li-ion conductivity of almost 10 S cm. However, near room temperature, its orthorhombic phase delivers Li-ion conductivity of only 10 S cm, which considerably hampers its further applications. In the present study, a highly disordered interface between LiBH and two-dimensional MoS in the composite material was formed, yielding ionic conductivity of 10 S cm at room temperature.

Catalytic effect of sandwich-like TiC/TiO(A)-C on hydrogen storage performance of MgH.

A sandwich-like TiC/TiO(A)-C prepared through a facile gas-solid method was doped into MgH by ball milling. TiC/TiO(A)-C shows a far superior catalytic effect on the hydrogen storage of MgH than individual TiC or TiO(A)-C, assigning as a synergistic catalysis between TiC and TiO(A)-C. For example, the peak dehydrogenation temperature of MgH-5 wt% TiC/TiO(A)-C is reduced to 308 °C, much lower than that of MgH-5 wt% TiC (340 °C) or MgH-5 wt% TiO(A)-C (356 °C).

Remarkable Synergistic Catalysis of Ni-Doped Ultrafine TiO on Hydrogen Sorption Kinetics of MgH.

Catalysts play an extraordinarily important role in accelerating the hydrogen sorption rates in metal-hydrogen systems. Herein, we report a surprisingly synergetic enhancement of metal-metal oxide cocatalyst on the hydrogen sorption properties of MgH: only 5 wt % doping of Ni into ultrafine TiO enables a significant increase in hydrogen desorption kinetics; it absorbs 4.50 wt % hydrogen even at a low temperature of 50 °C.

Enhancing hydrogen storage performances of MgH by Ni nano-particles over mesoporous carbon CMK-3.

Nano-dispersed Ni particles over mesoporous carbon material CMK-3 (Ni/CMK-3) was fabricated by means of impregnation-reduction strategy using precursor NiCl · 6HO, which is beneficial to improving the de/rehydrogenation performances of MgH. The dehydrogenation onset temperature of MgH-Ni/CMK-3 is significantly lowered by 170 K from that of pristine MgH (around 603 K). Totally 5.

Metal Hydride Nanoparticles with Ultrahigh Structural Stability and Hydrogen Storage Activity Derived from Microencapsulated Nanoconfinement.

Metal hydrides (MHs) have recently been designed for hydrogen sensors, switchable mirrors, rechargeable batteries, and other energy-storage and conversion-related applications. The demands of MHs, particular fast hydrogen absorption/desorption kinetics, have brought their sizes to nanoscale. However, the nanostructured MHs generally suffer from surface passivation and low aggregation-resisting structural stability upon absorption/desorption.

Excellent catalytic effects of multi-walled carbon nanotube supported titania on hydrogen storage of a Mg-Ni alloy.

Superior catalytic effects of multi-walled carbon nanotube supported titania synthesized by the sol-gel method on hydrogen storage of a Mg-Ni alloy were investigated. The excellent hydrogen storage properties were obtained: absorbed 5.60 wt% H2 within 60 s at 373 K and released 6.

Highly efficient bimetal synergetic catalysis by a multi-wall carbon nanotube supported palladium and nickel catalyst for the hydrogen storage of magnesium hydride.

A multi-wall carbon nanotube supported Pd and Ni catalyst efficiently catalyzes the hydrogen storage of magnesium hydride prepared by HCS + MM. Excellent hydrogen storage properties were obtained: hydrogen absorption - 6.44 wt% within 100 s at 373 K, hydrogen desorption - 6.

A hydrothermal synthesis of Pr3+ doped mesoporous TiO2 for UV light photocatalysis.

Pr3+ doped mesoporous TiO2 photocatalysts with a different molar ratio of Pr to Ti were prepared by a hydrothermal method using triblock copolymer as the template. The as-prepared samples were systematically characterized by X-ray diffraction, N2 adsorption-desorption, X-ray photoelectron spectra, transmission electron microscopy and UV-visible diffuse reflectance spectroscopy. The characterizations indicated all the samples had mesoporous structure and narrow pore size distribution.

Efficient catalysis by MgCl2 in hydrogen generation via hydrolysis of Mg-based hydride prepared by hydriding combustion synthesis.

Magnesium chloride efficiently catalyzed the hydrolysis of Mg-based hydride prepared by hydriding combustion synthesis. Hydrogen yield of 1635 mL g(-1) was obtained (MgH(2)), i.e.

Low-level lead exposure attenuates the expression of three major isoforms of neural cell adhesion molecule.

Toxic lead (Pb) exposure poses serious risks to human health, especially to children at developmental stages, even at low exposure levels. Neural cell adhesion molecule (NCAM) is considered to be a potential early target in the neurotoxicity of Pb due to its role in cell adhesion, neuronal migration, synaptic plasticity, and learning and memory. However, the effect of low-level Pb exposure on the specific expression of NCAM isoforms has not been reported.