KPF6

KPF6, also known as potassium hexafluorophosphate, is an inorganic salt with the chemical formula KPF6. It is a white crystalline solid that is soluble in water and melts at a relatively high temperature. KPF6 is often used as a source of the hexafluorophosphate anion (PF6-), which is a non-coordinating anion frequently employed in electrochemistry and coordination chemistry.

The hexafluorophosphate anion is known for its stability and its ability to stabilize reactive cations. This property makes KPF6 a useful electrolyte salt in batteries, particularly in lithium-ion batteries, where it helps to improve conductivity and performance. It is also used in the synthesis of various metal complexes and ionic liquids.

In terms of safety, KPF6 is considered an irritant and should be handled with appropriate protective measures. It can decompose when heated strongly, releasing toxic fumes. Its industrial production typically involves the reaction of potassium fluoride with phosphorus pentafluoride. KPF6 finds applications beyond batteries, including in photography and as a flux in certain metallurgical processes.