A puffer type gas circuit breaker wherein an insulated nozzle made of heat proof resin and a movable arc contact are mounted on a puffer cylinder to perform an openclose operation of the contact. A hinge is disposed on a lower edge of the case that serves to connect parallel longitudinal edges of the first half and the second half about which the case can be opened. The springs force the post back to an upright position. In addition, when a lithium-ion secondary battery is fabricated using the carbon electrode coated with lithium or a lithium alloy, the capacity degradation due to the irreversible capacity of the conventional carbon electrode appearing at the initial state of charging can be prevented, so that the capacity can be increased. Thereafter, the wheel is gradually heated to make the material set and form the fluoride polymer layers.