Patent ID: 7855009

Claim:
An electrochemical cell, which comprises: a) an anode of lithium; b) an elongate cathode having a length extending to opposed first and second cathode ends, the cathode comprising: a first cathode active material/first current collector/second cathode active material/second current collector/third cathode active material, wherein the first and third cathode active materials are the same or different and are of a material or materials that have a relatively higher rate capability, but a lower energy density than the second cathode active material, wherein the first current collector extends from a first proximal end of a first inner portion to a first distal end and the second current collector extends from a second proximal end of a second inner portion to a second distal end with the first and second current collectors being aligned one on top of the other only in a middle region where the first and second inner portions of the cathode current collectors overlap about midway between the first and second cathode ends and wherein a percentage of overlap of the first inner portion of the first cathode current collector with the second inner portion of the second cathode current collector is less than half the length of the cathode measured from the first distal end to the second distal end; and d) a nonaqueous electrolyte activating the anode and the cathode.