Níquelhidruro

Níquelhidruro is a chemical compound that refers to a hydride of nickel. In its most common form, it is often found in the context of rechargeable nickel-metal hydride (NiMH) batteries. In these batteries, the negative electrode is typically made of a metal alloy that can absorb and release hydrogen. When the battery is charged, hydrogen is absorbed by the alloy, forming nickel hydride species within the electrode structure. During discharge, this hydrogen is released and reacts with nickel oxyhydroxide in the positive electrode to produce electricity.

The term níquelhidruro itself can also refer to specific nickel hydride compounds that may be synthesized or studied for their chemical properties. These compounds are generally formed when nickel reacts with hydrogen under certain conditions, such as high pressure or temperature. The exact stoichiometry and structure of nickel hydride can vary depending on the synthesis method and conditions. Research into nickel hydrides is relevant to areas such as hydrogen storage and catalysis, though their practical applications are often overshadowed by their role in NiMH battery technology. The reversible nature of hydrogen absorption and desorption in nickel-based alloys is the key principle behind their utility.