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US 11,081,721 B2Granted
Secondary electrochemical cells with separator and electrolyte combination
AssigneeDuracell U.S. Operations, Inc.
InventorsNikolai Nikolaevich Issaev, Alexander Kaplan, Junan Kao, Kirakodu S. Nanjundaswamy, Michael Pozin, Fan Zhang
Life of this patent
Estimating the term…
Abstract
A secondary electrochemical cell comprises an anode, a cathode including electrochemically active cathode material, a separator between the anode and the cathode, and an electrolyte. The electrolyte comprises at least one salt dissolved in at least one organic solvent. The separator in combination with the electrolyte has an area-specific resistance of less than about 2 ohm-cm2.
Claims18
A secondary electrochemical cell comprising an anode;
- a cathode comprising electrochemically active cathode material, said electrochemically active cathode material is selected from the group consisting of lithium-transition-metal phosphate, sodium-transition-metal phosphate, lithium-metal oxide, and any mixture thereof;
- a cast separator consisting of a material selected from the group consisting of polypropylene, polyethylene, polyvinylidene, poly(vinylidene fluoride), and any mixture thereof between said anode and said cathode;
- and an electrolyte said electrolyte comprising at least one salt dissolved in at least one organic solvent, wherein said separator in combination with said electrolyte has an area-specific resistance of less than about 2 ohm-cm2 and wherein said lithium-metal oxide is selected from the group consisting of LiCoO2, LiNixMn2O4, Li(NixCoyAlz)O2, Li(NixMnyCoz)O2, aLi2MnO3·(1−a)Li(NixMnyCoz)O2, and any mixture thereof wherein 0<a<1, 0≤x≤1, 0≤y≤1, and 0≤z≤1.
Dependencies are inferred from the claim text.