Lithium ion Battery Graphene Anode Material

Graphene anode material has the potential to replace graphite material as a new cathode material for lithium ion batteries due to its unique two-dimensional structure, excellent electron transport capacity and super large specific surface area. The lithium storage mechanism of graphene anode material is similar to that of other carbonaceous materials. During charging, lithium ions come out from the cathode electrode and form Li2C6 through embedding electrolyte into carbon material layers. When discharging, lithium ions come out and return to the cathode electrode. Due to the special two-dimensional structure of graphene material, when the lamellar spacing is greater than 0.7nm, both sides of graphene can store lithium ions. At the same time, because graphene has folds and can also store lithium, in theory its capacity may be twice that of graphite, more than 744mAh/g.