Lithium air battery
A main object of the present invention is to provide a lithium air battery which can use different battery properties according to the current density at the time of discharge. The present invention attains the object by providing a lithium air battery comprising a cathode layer, an anode layer, and an electrolyte layer formed between the cathode layer and the anode layer, characterized in that the cathode layer further comprises a first cathode layer having at least oxygen reduction ability and a second cathode layer having at least Li ion storage ability, and the second cathode layer contains a cathode active material having an average voltage of less than 2.0 V (vs. Li) or an average voltage of more than 2.9 V (vs. Li).
1. A dual-type battery configured to function as a high-capacity lithium air battery at a time of low-current discharge and a high-power lithium ion battery at the time of large-current discharge, the dual-type battery comprising a cathode layer, an anode layer, and an electrolyte layer formed between the cathode layer and the anode layer,
wherein the cathode layer further comprises a first cathode layer having at least oxygen reduction ability and a second cathode layer having at least Li ion storage ability,
wherein an operating voltage range of the first cathode layer having at least oxygen reduction ability is completely separated from an operating voltage range of the second cathode layer having at least Li ion storage ability,
the second cathode layer contains a cathode active material having an average voltage of less than 2.0 V (vs. Li) or an average voltage of more than 2.9 V (vs. Li), and
the first cathode layer and the second cathode layer are laminated and provided in order of the second cathode layer and the first cathode layer from the anode layer side.
2. The dual-type battery according to claim 1 , wherein the cathode active material is graphite or Li 4 Ti 5 0 12 .
3. The dual-type battery according to claim 1 , wherein the cathode active material is LiCo0 2 or LiFeP0 4 .