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US 5,698,342 AGranted
Electrode containing coated particles
AssigneeElectro Energy, Inc.
InventorMartin Klein
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AssigneeElectro Energy, Inc.
InventorMartin Klein
Estimating the term…
The subject invention relates to electrode structures that are adaptable for primary and electrically rechargeable electrochemical wafer cells. A flat wafer cell is disclosed that includes conductive, carbon-filled polymeric outer layers that serve as electrode contacts and as a means of containment of the cell. Multi-cell, higher voltage batteries may be constructed by stacking individual cells. Specially formulated electrodes and processing techniques that are compatible with the wafer cell construction are disclosed for a nickel-metal hydride battery system. This invention is further directed to fabrication of electrodes from electrochemically active material prepared by coating non- to low-conductive particles of a metal hydroxide or metal oxide powder with nickel using a electroless nickel coating process. The cell design and electrode formulations provide for individual operation of a vented or low pressure sealed cell and/or for operation of these cells in a stacked array in an outer battery housing.
A battery electrode material comprising particles of a non-electronically conductive electrochemically active material coated with a metal layer wherein the coated particles when compressed together have a bulk resistivity less than about 2 ohm-cm and an electrochemical utilization efficiency of 75 percent or higher.
A battery electrode comprising an electrode containing particles of a non-electronically conductive electrochemically active material coated with a metal layer wherein the coated particles when compressed together have a bulk resistivity less than about 2 ohm-cm and an electrochemical utilization efficiency of 75 percent or higher and wherein the weight of said electrochemically active material, not including the weight of the metal coating, comprises greater than 55 percent of the total electrode weight.
A battery electrode material comprising particles of an electrochemically active material coated with a metal layer wherein the coated particles when compressed together have a bulk resistivity less than about 2 ohm-cm and an electrochemical utilization efficiency of 75 percent or higher, wherein said electrochemically active material is selected from the group consisting of MnO.sub.2, CoO.sub.3, VO.sub.3, and Ni(OH).sub.2.
A battery electrode comprising an electrode containing particles of an electrochemically active material coated with a metal layer wherein the coated particles when compressed together have a bulk resistivity less than about 2 ohm-cm and an electrochemical utilization efficiency of 75 percent or higher and wherein the weight of said electrochemically active material, not including the weight of the metal coating, comprises greater than 55 percent of the total electrode weight, wherein said electrochemically active material is selected from the group consisting of MnO.sub.2, CoO.sub.3, VO.sub.3, and Ni(OH).sub.2.
A battery electrode material comprising particles of electrochemically active metal oxide coated with a metal layer wherein the coated particles when compressed together have a bulk resistivity less than about 2 ohm-cm and an electrochemical utilization efficiency of 75 percent or higher.
A battery electrode comprising an electrode containing particles of electrochemically active metal oxide coated with a metal layer wherein the coated particles when compressed together have a bulk resistivity less than about 2 ohm-cm and an electrochemical utilization efficiency of 75 percent or higher and wherein the weight of said electrochemically active material, not including the weight of the metal coating, comprises greater than 55 percent of the total electrode weight.
Dependencies are inferred from the claim text.