Facile Magnetite Coating for Stable High-Voltage Cycling of Nickel-Rich Cathodes in Conventional Liquid and All-Solid-State Lithium-Ion Batteries.

The instability of Nickel (Ni)-rich cathodes at high voltage is a critical bottleneck toward developing superior lithium-ion batteries. This instability is driven by cathode-electrolyte side reactions, causing rapid degradation, and compromising the overall cycle life. In this study, a protective coating using dispersed "magnetite (FeO.

Machine Learning-Aided Band Gap Engineering of BaZrS Chalcogenide Perovskite.

The non-toxic and stable chalcogenide perovskite BaZrS fulfills many key optoelectronic properties for a high-efficiency photovoltaic material. It has been shown to possess a direct band gap with a large absorption coefficient and good carrier mobility values. With a reported band gap of 1.

Reversible and rapid calcium intercalation into molybdenum vanadium oxides.

Looming concerns regarding scarcity, high prices, and safety threaten the long-term use of lithium in energy storage devices. Calcium has been explored in batteries because of its abundance and low cost, but the larger size and higher charge density of calcium ions relative to lithium impairs diffusion kinetics and cyclic stability. In this work, an aqueous calcium-ion battery is demonstrated using orthorhombic, trigonal, and tetragonal polymorphs of molybdenum vanadium oxide (MoVO) as a host for calcium ions.