Multilayered gel electrolyte bonded rechargeable electrochemical cell and method of making same
First Claim
1. A method of making a rechargeable electrochemical cell including first and second electrodes, and a porous separator element having first and second major sides, said method comprising the steps of:
- providing said porous separator element as a first polymer region comprising a multilayered polymer region;
coating at least one of said electrodes or said separator element with a layer of a gelling polymer, which gelling polymer will, when exposed to an electrolyte active species and heat, bond said porous separator element to said electrodes;
disposing said first and second electrodes on opposite sides of said separator element;
introducing said electrolyte active species into at least said gelling polymer;
sealing said first and second electrodes and said separator element in a liquid and vapor impermeable package; and
heating said electrodes, separator and gelling polymer to a temperature sufficient to cause said gelling polymer to bond said electrodes to said separator element.
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Accused Products
Abstract
An electrochemical cell 10 includes first and second electrodes 12 and 14 with an electrolyte system 26 disposed therebetween. The electrolyte system includes at least a multilayered first polymeric region 28, having second layers 30 and 32, of a second polymer material. The second layers may absorb an electrolyte active species and to adhere the adjacent layer of electrode material to the electrolyte 26. The electrolyte system further includes a process for packaging and curing the electrolyte after it has been incorporated into a discrete battery device.
51 Citations
12 Claims
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1. A method of making a rechargeable electrochemical cell including first and second electrodes, and a porous separator element having first and second major sides, said method comprising the steps of:
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providing said porous separator element as a first polymer region comprising a multilayered polymer region; coating at least one of said electrodes or said separator element with a layer of a gelling polymer, which gelling polymer will, when exposed to an electrolyte active species and heat, bond said porous separator element to said electrodes; disposing said first and second electrodes on opposite sides of said separator element; introducing said electrolyte active species into at least said gelling polymer; sealing said first and second electrodes and said separator element in a liquid and vapor impermeable package; and heating said electrodes, separator and gelling polymer to a temperature sufficient to cause said gelling polymer to bond said electrodes to said separator element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification