Patent ID: 8642212
Filing Date: 2014-02-04
Classification: H01M

Abstract:
1. An FR6 electrochemical battery cell comprising: a cylindrical housing; a negative electrode strip consisting essentially of metallic lithium or lithium alloyed with a metal; a positive electrode strip comprising iron disulfide coated onto one or both sides of a thin metal strip, said positive electrode strip having a cathode interfacial capacity determined by a theoretical discharge capacity of only portions of the iron disulfide in the coating that are adjacent to the lithium or lithium alloy; an electrolyte comprising at least one salt dissolved in a nonaqueous electrolyte disposed within the housing; a separator consisting essentially of a microporous membrane including polyethylene, said microporous membrane having a total a thickness of less than 25 μm and disposed between the negative and positive electrodes; wherein the positive electrode strip, the negative electrode strip and the separator are spirally wound to form an electrode assembly having an electrode assembly interfacial volume with a radius bounded by an inner surface of the cylindrical housing and a height bounded a longitudinal axis of the cell in which active materials in the positive electrode strip and the negative electrode strip are adjacent to one another; and wherein the cell has: i) a ratio of the cathode interfacial capacity to the electrode assembly interfacial volume of at least 710 mAh/cm