Abstract: A method to make a graphite block of any desired size and with over 99% carbon purity and high density is provided. The graphite block is obtained by mixing graphite flakes of any size with graphene oxide sheets and subjecting the mixture to elevated temperature and pressure. With this method large graphite blocks can be obtained economically and fast. The graphite blocks of this invention have superlubricity characters.

Abstract: An all graphene battery is disclosed. The battery is designed into a form of a belt and can charge multiple portable electric devices simultaneously. The battery has a graphene based anode, a graphene composite based cathode. The electrolyte of the battery is gel like functionalized graphene oxide. The device of this disclosure may use thermoelectric effect to charge itself. The battery of this disclosure is safe, and has a high capacity, high energy density and long life time. The battery includes no liquids and is light weighted.