Patent ID: 6551747
Filing Date: 2003-04-22
Classification: H01M,Y02E

Abstract:
An electrochemical cell, which comprises:a) an anode; b) a cathode of a first cathode active material different than a second cathode active material, the first cathode active material being of a first energy density and a first rate capability and the second cathode active material being of a second energy density and a second rate capability, and wherein the cathode further comprises first and second current collectors with the second cathode active material sandwiched between the current collectors and with the first cathode active material contacting the first and second current collectors opposite the second cathode active material, and wherein the first energy density of the first cathode active material is less than the second energy density of the second cathode active material while the first rate capability of the first cathode active material is greater than the second rate capability of the second cathode active material; and c) an electrolyte activating the anode and the cathode.