▎ 摘　　要

NOVELTY - A lithium ion battery (100) has at least one battery cell with cathode electrode (102), anode electrode (104) and separator (106) sandwiched between the cathode electrode and the anode electrode. At least one of the cathode electrode and the anode electrode comprises a current collector such as cathode current collector (112) and/or anode current collector (114) which serves as a graphene layer. USE - Lithium ion battery. ADVANTAGE - Graphene layer used as the cathode current collector and/or the anode current collector, has relatively good conductivity, stable chemical and electrical stability, and low weight, which gives lithium ion battery with high power density and long lifespan. DESCRIPTION OF DRAWING(S) - The drawing shows the cross sectional view of the lithium ion battery. Lithium ion battery (100) Cathode electrode (102) Anode electrode (104) Separator (106) Cathode current collector (112) Anode current collector (114)