Nikkeloksiidihüdroksiidi

Nikkeloksiidihüdroksiidi is a chemical compound with the formula NiO(OH). It is a solid that exists in various hydrated forms, often represented as NiO(OH)·nH₂O, where n is a variable number of water molecules. This compound is closely related to nickel(III) oxide hydroxide. It is an important material in electrochemistry, particularly in the context of rechargeable nickel-based batteries such as nickel-cadmium (NiCd) and nickel-metal hydride (NiMH) batteries.

During the charging process of these batteries, nickel(II) hydroxide is oxidized to form nickel oxyhydroxide. This transformation is a key step in storing electrical energy. The reversible nature of this oxidation-reduction reaction allows the battery to be recharged and discharged multiple times. The precise crystal structure and electrochemical performance of nikkeloksiidihüdroksiidi can be influenced by the synthesis method and the presence of dopant elements. It is typically a dark brown or black solid. Due to its role in energy storage, research continues to explore ways to optimize its properties for improved battery efficiency and lifespan.