Patent ID: 6623884
Filing Date: 2003-09-23
Classification: H01M,Y02E,Y02P

Abstract:
An electrochemical cell, which comprises:a) an anode electrode of an anode material capable of intercalation and de-intercalation of lithium; b) a cathode electrode electrically associated with the anode electrode to provide at least a first region and a second region of the cell, wherein the first region and the second region comprise respective first and second lithium-retention materials; c) an electrolyte activating and operatively associating the anode electrode and the cathode electrode such that the first region and the second region are dischargeable independent of each other to provide separate and independent sources of electrical energy; and d) wherein a first capacity ratio and a second capacity ratio of the anode material to the respective first and second lithium-retention materials is at least 1.0:1.0, or greater.