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High capacity lithium ion battery formation protocol and corresponding batteries

  • US 9,553,301 B2
  • Filed: 08/24/2015
  • Issued: 01/24/2017
  • Est. Priority Date: 08/19/2011
  • Status: Active Grant
First Claim
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1. A method for the formation of a lithium ion secondary battery comprising a lithium rich metal oxide composition, a negative electrode, a separator between the positive electrode and negative electrode, and an electrolyte comprising lithium ions, the method comprising:

  • performing a first charge of the battery to a voltage from about 2.1 V to about 4.225V;

    after completing the first charge, holding the battery at an open circuit for a rest period at a temperature from about 35°

    C. to about 75°

    C.;

    performing a second charge after the completion of the rest period to a voltage from about 4.275V to about 4.39V;

    discharging the battery after the second charge to a voltage no more than about 2.75V; and

    partially charging the battery for distribution to users.

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