Patent ID: 7732097

Claim:
A coin-shaped battery comprising: a cathode can; a discoid cathode within the cathode can; an anode can; a discoid anode on the lithium metal foil within the anode can; a discoid lithium metal foil between the anode and the cathode can; a separator directly between the anode and the cathode; and an electrolyte including LiClO 4 and a solvent containing ethylene carbonate, dimethyl carbonate, and methyl ethyl carbonate injected therein wherein, an open circuit voltage in full charge state per a pair of cathode and anode is in the range from 2.9 V to 3.2 V, the cathode contains Li 4 Mn 5 O 12 material capable of inserting and extracting lithium, the anode contains a graphite material capable inserting and extracting lithium, a weight ratio of the cathode material to the anode material is in the range from 2.03 to 2.53, and a weight ratio of all of the lithium metal incorporated inside of the battery to the anode is in the range from 0.058 to 0.11.