| abstract |
(57) [Abstract] [Purpose] To suppress low Coulombic efficiency and decrease in discharge capacity after charging and discharging one day after charging and discharging in an electrode using a carbon material. [Structure] An electrode whose active material is a carbon material having fluorine atoms on its surface. According to the present invention, an electrode having excellent charge / discharge characteristics and a secondary battery using the same can be obtained by using a carbon material having a fluorine atom on the surface as an active material. |