A lithium–silicon battery is a type of rechargeable battery that uses a combination of lithium and silicon as its active materials. This type of battery has a higher energy density than traditional lithium-ion batteries, making it a potential candidate for use in electric vehicles and other applications that require high energy density. The lithium–silicon battery also has a longer cycle life than traditional lithium-ion batteries, meaning it can be recharged and discharged more times before needing to be replaced.