| abstract |
A hybrid cell including a lithium secondary battery having a linear voltage profile and a fuel cell, and a method of driving the same are disclosed. The lithium secondary battery having the linear voltage profile is fabricated by combining a plurality of positive electrode active materials having various electric potentials. The lithium secondary battery is hybridized with the fuel cell, thereby obtaining the hybrid cell having a small size and a high energy capacity, which is controllable by a controller having a relatively simple structure. |