INCREASED ENERGY DENSITY AND SWELLING CONTROL IN BATTERIES FOR PORTABLE ELECTRONIC DEVICES

摘要

The claimed invention relates to the design and manufacture of a battery cell including a cathode active coating (304) containing a first cathode active material and a second cathode active material with a lower first coulombic efficiency and a higher energy density than the first cathode active material. The battery cell also includes an anode active coating (308) containing a silicon-based anode active material and a carbonaceous anode active material. Finally, the battery cell includes a flexible pouch enclosing the cathode and the anode. Such blending of cathode and anode active materials may increase the energy density of the battery cell while mitigating the loss of capacity caused by the reaction of the silicon-based active material with lithium during initial charging and discharging of the battery cell.