PROTECTED LITHIUM COATINGS ON SEPARATORS FOR LITHIUM ION BATTERIES
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United States of America Patent
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Issued Date -
Jul 15, 2021
app pub date -
Jan 9, 2020
filing date -
Jan 9, 2020
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Abstract
Lithium ion batteries, cell stacks, separators and methods of producing thereof are provided. Separators comprise lithium coating on at least a part of a separator sheet, possibly with a protective layer made of a soluble polymer that covers the lithium coating from one or both sides of the separator sheet. Cell stacks are assembled with disclosed separators, in ways that may physically attach the lithium coating to the electrodes (anode(s) and/or cathode(s)) to prelithiate or lithiate them, respectively; and/or electrochemical processes may be used to deliver lithium from the coating to the respective electrodes. Disclosed methods increase the energy capacity and the stability of the formed lithium ion batteries, yielding energy-dense, long-living and fast charging batteries.
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