Patent ID: 8765303
Filing Date: 2014-07-01
Classification: B82Y,H01M,Y02E

Abstract:
1. A lithium-ion cell comprising: (a) A positive electrode (cathode) comprising a carbon or graphitic material selected from graphite worms, exfoliated graphite flakes, expanded graphite, chemically treated graphite with an inter-graphene planar separation no less than 0.4 nm, chemically etched or expanded soft carbon, chemically etched or expanded hard carbon, exfoliated activated carbon, chemically etched or expanded carbon black, chemically expanded multi-walled carbon nano-tube having a diameter from 1 to 100 nm, chemically expanded carbon nano-fiber having a diameter from 1 to 100 nm, or a combination thereof as the only cathode active material having a surface area to capture and store lithium thereon and wherein said cathode forms a meso-porous structure having a pore size in the range from 2 nm to 50 nm and a specific surface area greater than 50 m (b) A negative electrode (anode) comprising an anode active material having a lithium-storing capacity no less than 400 mAh/g, wherein said anode active material consisting of an intercalation compound is mixed with a conductive additive and/or a resin binder to form a porous electrode structure, or coated onto a current collector in a coating or thin film form, and wherein said anode active material is not pre-lithiated and is lithium-free when the cell is made; (c) A porous separator disposed between the anode and the cathode; (d) A lithium-containing electrolyte in ionic contact with the anode and the cathode; and (e) A lithium source disposed in at least one of the two electrodes when the cell is made.