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Lithium secondary cell with high charge and discharge rate capability and low impedance growth

  • US 20070166617A1
  • Filed: 09/11/2006
  • Published: 07/19/2007
  • Est. Priority Date: 02/06/2004
  • Status: Active Grant
First Claim
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1. A lithium secondary cell comprising:

  • a positive electrode including a lithium transition metal phosphate compound;

    a negative electrode including carbon;

    an electrolyte in contact with and separating the positive electrode and negative electrode;

    a positive electrode current collector in electronic communication with the positive electrode; and

    a negative electrode current collector in electronic communication with the negative electrode, wherein the cell exhibits impedance growth of no more than about 10% for every 1000 deep discharge charge-discharge cycles at a temperature of up to about 60°

    C.

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