Bipolar lithium-ion rechargeable battery
First Claim
1. A bipolar rechargeable lithium-ion battery comprising:
- a plurality of individual electrochemical cells having positive and negative electrodes disposed in opposite face-to-face arrangement with a porous separator containing electrolyte therebetween, wherein the positive and negative electrodes of adjacent cells are disposed in electrical connection respectively with opposite sides of a common current-collecting element forming a unitary bipolar structure, said negative electrode comprising a layer of carbon adhered to one of said opposite sides of said current-collecting element and said positive electrode comprising a layer containing a lithium transition metal oxide compound adhered to the other opposite side of said element, and wherein said electrolyte comprises a lithium salt dissolved in a non-aqueous, organic solvent, and means for joining said unitary bipolar structure of adjacent cells together in a sealed stacked array.
10 Assignments
0 Petitions
Accused Products
Abstract
A novel and improved rechargeable, lithium-ion battery system is composed of a plurality of individual electrochemical cells having positive and negative electrodes disposed in opposite face-to-face arrangement with a porous separator containing electrolyte therebetween, and wherein the positive and negative electrodes of adjacent cells are disposed in contact respectively with opposite sides of a common current-collecting element forming a unitary bipolar structure. The negative electrode comprises a layer of carbon adhered to one side of the current-collecting element while the positive electrode comprises a layer containing a lithium transition metal oxide or sulfide compound adhered to the other opposite side of the element. The unitary bipolar structures containing the positive and negative electrodes of adjacent cells include outer peripheral, electrically-insulating seal members, preferably in the form of plastic insulating rings, which are joined together in a sealed stacked array.
-
Citations
20 Claims
-
1. A bipolar rechargeable lithium-ion battery comprising:
- a plurality of individual electrochemical cells having positive and negative electrodes disposed in opposite face-to-face arrangement with a porous separator containing electrolyte therebetween, wherein the positive and negative electrodes of adjacent cells are disposed in electrical connection respectively with opposite sides of a common current-collecting element forming a unitary bipolar structure, said negative electrode comprising a layer of carbon adhered to one of said opposite sides of said current-collecting element and said positive electrode comprising a layer containing a lithium transition metal oxide compound adhered to the other opposite side of said element, and wherein said electrolyte comprises a lithium salt dissolved in a non-aqueous, organic solvent, and means for joining said unitary bipolar structure of adjacent cells together in a sealed stacked array.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 19, 20)
- 8. A unitary bipolar structure for use in a rechargeable, lithium-ion battery comprising a solid, liquid impermeable, current-collecting element having opposite sides comprising respectively copper and aluminum, a negative electrode comprising a layer of carbon adhered to one of said opposite sides of said element and a positive electrode comprising a layer containing a lithium transition metal oxide compound adhered to the other opposite side of said element.
-
12. A bipolar rechargeable lithium-ion battery comprising:
- a plurality of individual electrochemical cells having positive and negative electrodes disposed in opposite face-to-face arrangement with a porous separator containing electrolyte therebetween, and wherein the positive and negative electrodes of adjacent cells are disposed in physical and electrical contact respectively with opposite sides of a common current-collecting element forming a unitary bipolar structure, said current-collecting element comprising a thin, bi-metallic foil member composed of copper on one side and aluminum on the other side thereof, said negative electrode comprising a layer of carbon adhered to said copper side of said bi-metallic member and said positive electrode comprising a layer containing a lithium transition metal oxide selected from the group consisting of LiCoO2, LiNiO2, LiMn2 O4, Li2 Mn2 O4 and mixtures thereof, adhered to the other aluminum side of said member, said positive and negative electrodes contacting and adhering to substantially the entire surface areas of the respective sides of said bi-metallic member, said electrolyte being a non-aqueous solution comprising a solute selected from the group consisting of LiPF6, LiBF4, LiAsF6, LiCF3 SO3, LiN(CF3 SO2)2, LiClO4 and mixtures thereof, dissolved in a solvent selected from the group consisting of propylene carbonate, ethylene carbonate, diethyl carbonate, dimethoxyethane, dimethyl carbonate and mixtures thereof, and means for joining said unitary bipolar structure of adjacent cells together in a sealed stacked array.
- View Dependent Claims (13, 14)
-
15. A bipolar rechargeable lithium-ion battery comprising:
- a plurality of individual electrochemical cells having positive and negative electrodes disposed in opposite face-to-face arrangement with a porous separator containing electrolyte therebetween, wherein the positive and negative electrodes of adjacent cells are disposed in electrical connection respectively with opposite sides of a common current-collecting element forming a unitary bipolar structure, said current-collecting element comprising copper on one of said opposite sides and aluminum on the other of said opposite sides, said negative electrode comprising a layer containing petroleum coke, carbon, graphite or mixtures thereof adhered to one of said opposite sides of said current-collecting element and said positive electrode comprising a layer containing a lithiated transition metal oxide selected from the group consisting of LiCoO2, LiNiO2, LiMn2 O4, Li2 Mn2 O4 or combinations of these materials adhered to the other opposite side of said element, and means for joining said unitary bipolar structure of adjacent cells together in a sealed stacked array.
- View Dependent Claims (17)
- 16. A unitary bipolar structure for use in a rechargeable, lithium-ion battery comprising a solid, liquid impermeable, current-collecting element having opposite sides comprising copper and aluminum, a negative electrode comprising a layer containing petroleum coke, carbon, graphite or mixtures thereof adhered to one of said opposite sides of said element and a positive electrode comprising a layer containing a lithiated transition metal oxide selected from the group consisting of LiCoO2, LiNiO2, LiMn2 O4, Li2 Mn2 O4 and combinations of these materials adhered to the other opposite side of said element.
Specification