High Lithium Insertion Voltage Single-Crystal H2 Ti12 O25 Nanorods as a High-Capacity and High-Rate Lithium-Ion Battery Anode Material

The versatile family of molybdenum oxides: synthesis, properties, and recent applications

The family of molybdenum oxides has numerous advantages that make them strong candidates for high-value research and various commercial applications. The variation of their multiple oxidation states allows their existence in a wide range of compositions and morphologies that converts them into highly versatile and tunable materials for incorporation into energy, electronics, optical, and biological systems. In this review, a survey is presented of the most general properties of molybdenum oxides including the crystalline structures and the physical properties, with emphasis on present issues and challenging scientific and technological aspects. A section is devoted to the thermodynamical properties and the most common preparation techniques. Then, recent applications are described, including photodetectors, thermoelectric devices, solar cells, photo-thermal therapies, gas sensors, and energy storage.

Emerging Layered Metallic Vanadium Disulfide for Rechargeable Metal-Ion Batteries: Progress and Opportunities

Rechargeable metal-ion batteries (RMIBs), as one of the most viable technologies for electric vehicles (EVs) and large-scale energy storage (EES), have received extensive research attention for a long time. Electrode materials play a decisive role on capacity, energy, and power density, which directly affect the practical applications of RMIBs in EVs and EES. As an electrode material, layered metallic vanadium disulfide (VS₂ ) has theoretically and experimentally produced inspiring results because of its synthetic characteristics of continuously adjustable V valence, large interlayer spacing, weak interlayer interactions, and high surface activity. Herein, the synthetic strategies, theoretical metal-ion storage sites, diffusion kinetics, and experimental electrochemical reaction mechanisms of VS₂ for RMIBs are systematically introduced. Emphatically, the critical issues that affect the metal-ion storage properties of the VS₂ electrode and three major enhancement strategies, namely, optimizing the electrolyte and cutoff voltage, constructing a space-confined structure, and controlling the crystal structure are summarized, with the aim of promoting the development of transition-metal dichalcogenides. Finally, the challenges and opportunities for the future development of VS₂ in the energy-storage field are presented. It is hoped that this review can attract attention from researchers for investigations into emerging layered metallic VS₂ and provide insights toward the design of an excellent VS₂ electrode material for next-generation, high-performance RMIBs.

Recent Progress on Molybdenum Oxides for Rechargeable Batteries

Diminishing fossil-fuel resources and a rise in energy demands has required the pursuit of sustainable and rechargeable energy-storage materials, including batteries and supercapacitors, the electrochemical properties of which depend largely on the electrode materials. In recent decades, numerous electrode materials with excellent electrochemical energy-storage capabilities, long life spans, and environmentally acceptable qualities have been developed. Among existing materials, molybdenum oxides containing MoO₃ and MoO₂ , as well as their composites, are very fascinating contenders for competent energy-storage devices because of their exceptional physicochemical properties, such as thermal stability, high theoretical capability, and mechanical strength. This Minireview mainly focuses on the latest progress for the use of molybdenum oxides as electrode materials for lithium-ion batteries; sodium-ion batteries; and other novel batteries, such as lithium-sulfur batteries, lithium-oxygen batteries, and newly developed hydrogen-ion batteries, with a focus on studies of the reaction mechanism, design of the electrode structures, and improvement of the electrochemical properties.

In situ topotactic synthesis of a porous network Zn2Ti3O8 platelike nanoarchitecture and its long-term cycle performance for a LIB anode

Porous network Zn₂Ti₃O₈ platelike nanoarchitecture was prepared by an ion exchange reaction and further in situ topotactic transformation, and it exhibited an enhanced reversibility capacity of 408 mA h g⁻¹ after 1000 cycles at a current density of 1 Ag⁻¹.