Yes the early batteries used graphite (graphene was already proposed as a theoretical possibility but not replicated in a lab setting until 2004). However, wit

Yes the early batteries used graphite (graphene was already proposed as a theoretical possibility but not replicated in a lab setting until 2004). However, with its discovery, graphene has been extensively researched for batteries and more is ongoing. Graphene is used in the manufacturing process for some lithium batteries where I assume it is used to build the graphite porous structure with fewer impurities and with better control of its composition. (total speculation).