Patent ID: 8221915

Claim:
A lithium-ion electrochemical cell, the cell comprising: (i) an anode, the anode comprising an anode active material in electronically conductive contact with an anode current collector, wherein the anode active material is selected from the group consisting of lithium metal, carbon, lithium-intercalated carbon, lithium nitrides, lithium alloys, and lithium-alloy-forming compounds of tin, silicon, antimony, aluminum or titanium oxide; (ii) a cathode exhibiting an upper charging voltage in the range of 3 to 5 volts with respect to a Li/Li + reference electrode, the cathode comprising: a cathode current collector comprising: aluminum or an aluminum alloy; and a coating, the coating comprising conductive carbon, graphite, or a mixture thereof; wherein the coating has a practical thickness of 0.1 to 8 micrometers; wherein the coating has a topography of peaks and valleys; wherein at least some valleys expose an aluminum or aluminum alloy surface; and a film on the exposed aluminum or aluminum alloy surfaces; and a cathode active material placed on the top of the coating, the cathode active material comprising a lithium insertion transition metal oxide or phosphate; (iii) an ion-permeable membrane as a separator between the anode and cathode; and (iv) an electrolyte solution being in ionically conductive contact with the anode and cathode, the electrolyte solution comprising (a) an additive, (b) a lithium compound, and (c) least one aprotic polar-solvent, a polymer, or a mixture of at least one aprotic polar solvent and a polymer; the lithium compound being at a concentration from about 0.1 to 3 molar, wherein the lithium compound is CF 3 SO 2 N − (Li + )SO 2 CF 3 ; the additive providing corrosion protection of the cathode current collector, the anode current collector, or both current collectors; wherein the additive is selected from the group consisting of LiBOB, LiF, LiFOB, LiPF 6 , LiBF 4 , LiAsF 6 , LiClO 4 , and LiPF n (R f ) m ; wherein n+m is 6, and R f is CF 3 or C 2 F 5 ; and wherein the additive creates the film on the exposed aluminum or an aluminum alloy surfaces of the cathode current collector.