NiO

Nickel oxide (NiO) is a ceramic compound belonging to the rock-salt structured oxides, widely recognized as a p-type semiconductor and a key constituent in catalytic and electrochemical applications. It is used industrially in catalysts for chemical synthesis, battery electrodes (particularly in nickel-metal hydride and lithium-ion systems), and as a coating material for corrosion resistance in high-temperature environments. Engineers select NiO for applications requiring chemical stability at elevated temperatures, catalytic activity, or controlled electrical conductivity; its cubic crystal structure and mechanical stiffness make it suitable for harsh operational conditions where traditional metals would oxidize or degrade.