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US 5,478,675 AGranted
Secondary battery
AssigneeHival Ltd.
InventorToru Nagaura
Life of this patent
Estimating the term…
Abstract
A nonaqueous electrolyte secondary battery comprising a cathode, an anode, a separator and a nonaqueous electrolyte, wherein a spinel type lithium manganese complex oxide is used as main active substance for the cathode, which is characterized in that a solid state lithium ion conductor is mixed with the main active substance in the cathode.
Claims3
A nonaqueous electrolyte secondary battery comprising:
- a cathode;
- an anode;
- a separator;
- a nonaqueous electrolyte;
- wherein said cathode comprises a main active substance comprising a spinel lithium manganese complex oxide and wherein said cathode comprises a solid state lithium ion conductor that is mixed with the main active substance, further comprising an anode comprising an active substance comprising a carbon material capable of doping and dedoping lithium;
- and
- wherein said cathode comprises Li.sub.x Co.sub.1-y Ni.sub.y O.sub.2 (where 0<x<, 0.ltoreq.y.ltoreq.1) as a lithium ion conductor comprising 5 mole % or more and 50 mole % or less of the cathode main active substance;
- and wherein a molar number a of Mn and a sum b molar number of Co and Ni contained in a cathode active substance layer, and a molar number c of active substance carbon contained in an anode active substance layer confronting the cathode are in the relation of:
- 0.12.ltoreq.(a+2b)/2c.ltoreq.0.17.
6 more elements
Dependencies are inferred from the claim text.