Patent ID: 11973178
Assignee: IONBLOX, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A lithium ion cell comprising:
a negative electrode comprising from about 87 wt % to about 92 wt % an active material, from about 1 wt % to about 7 wt % nanoscale conductive carbon and from about 6 wt % to about 20 wt % polymer binder, wherein the active material comprises from about 35 wt % to about 95 wt % silicon oxide-based material and from about 5 wt % to about 65 wt % graphite, and wherein the polymer binder has a tensile strength of at least about 60 MPa;
a positive electrode comprising a lithium nickel cobalt manganese oxide approximately represented by the formula LiNixMnyCozO2, where x+y+z≈1, 0.5≤x, 0.025≤y≤0.35, 0.025≤z≤0.3, conductive carbon, and a polymer binder;
supplemental lithium in an amount from about 60% to about 180% of the negative electrode first cycle irreversible capacity loss;
a separator between the negative electrode and the positive electrode;
electrolyte comprising from about 1.25M to about 2 M lithium salt and non-aqueous solvent, wherein the non-aqueous solvent comprises at least about 5 volume percent to about 20 volume percent fluoroethylene carbonate, and at least about 25 volume percent combined amount of dimethyl carbonate, and ethylmethyl carbonate, from about 20 volume percent to about 50 volume percent diethyl carbonate, wherein the electrolyte is substantially free of ethylene carbonate; and
a container enclosing the negative electrode, positive electrode, separator and electrolyte.