| CPC H01M 4/364 (2013.01) [H01M 4/386 (2013.01); H01M 4/583 (2013.01); H01M 10/0525 (2013.01); H01M 10/0567 (2013.01); H01M 50/417 (2021.01); H01M 50/426 (2021.01); H01M 50/491 (2021.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] | 30 Claims |
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1. A rechargeable battery cell, comprising:
an anode having at least one surface with a reversible areal capacity, after formation, up to 8.0 mAh/cm2, and containing a Si—C composite within a porous structure and including a carbon-based conductive additive, wherein the Si—C composite is at least 30% Si by weight, and the material is at least 85% Si—C composite;
a cathode having at least one surface with a reversible areal capacity, after formation, up to 6 mAh/cm2, wherein a ratio of areal capacity of the at least one surface of the anode to the at least one surface of the cathode is between 1.15 to 1.45;
an electrolyte capable of carrying Li-ions between the anode and the cathode; and
a dielectric separator between the anode and the cathode, the separator having a porosity of greater than 38%,
at least one carbon material or carbon additive;
a binder in an amount less than 20% by weight; and
a polymer-based dispersant in an amount less than 2% by weight,
wherein the polymer-based dispersant includes polymer chains between 10,000 and 50,000 g/mol, and
wherein an interface between the anode and the cathode is pressurized in an amount sufficient to manage volumetric changes during charging and discharging processes, and wherein the anode and cathode are configured to cooperate to output an average discharge voltage of no greater than 3.55 V.
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