Electrochemical reductions of fluorinated fullerenes with compositions between C60F15 and C60F47 were investigated by potential sweep and constant current discharge in 1 M LiClO4 propylene carbonate solution. The first reduction peak decreased from 3.28 V to 3.04 V with decreasing fluorine content of fluorinated fullerenes from C60F44 to C60F30. Carbon additives mixed in the electrodes as electrical conductors drastically changed the dissolution rate of reduced species of fluorinated C-60. The dissolution rates of the reduced anions decreased in the order of natural graphite powder, petroleum coke and acetylene black. The discharge capacities increased with decreasing dissolution rate of reduced species and with increasing fluorine content in the fluorinated C-60. Constant current discharge of C60F44 at 0.1 mA cm(-2) gave the discharge capacity, 560 mA hg(-1) and the energy density, 1400 Wh kg(-1).