Patent ID: 8153304

Claim:
An electrochemical cell, which comprises: a) an anode; b) a cathode comprising a fluorinated carbon selected from CF x with x equal to about 1.1 and C 2 F as a first cathode active material having a relatively high energy density but a relatively low rate capability contacted to a first major side of a cathode current collector and a second cathode active material having a relatively low energy density but a relatively high rate capability contacted to a second, opposite major side of the cathode current collector, wherein the fluorinated carbon contacted to the cathode current collector is characterized as having been subjected to a cyclic pressure at a frequency of about 0.1 Hz to about 1 Hz to thereby provide the fluorinated carbon having a compacted density of about 1.7 grams/cc to about 1.8 grams/cc; c) a separator intermediate the anode and cathode in electrical association with each other; and d) an electrolyte activating the anode and cathode.