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Formation process for lithium-ion batteries

  • US 8,980,453 B2
  • Filed: 04/30/2008
  • Issued: 03/17/2015
  • Est. Priority Date: 04/30/2008
  • Status: Active Grant
First Claim
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1. A method for producing a battery comprising:

  • providing a battery comprising a positive electrode, a negative electrode, and an electrolyte comprising a solvent and a salt, wherein the capacity of the negative electrode is less than that of the positive electrode and the negative electrode comprises an active material having an average potential versus a lithium reference electrode of greater than approximately 1.0 volts; and

    applying an initial charge to the battery and continuing the initial charge beyond the point where the battery is fully charged, wherein the initial charge after the battery is fully charged is applied for approximately 4 hours or more at a voltage that is greater than a fully charged voltage of the battery.

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