公开(公告)号：JPH09180723A

公开(公告)日：1997-07-11

申请号：JP33794396

申请日：1996-12-18

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： SUUNHO CHIYAN ,  KIIHO JIYAN ,  SEOONGU KAN

IPC: H01M10/05 ,  H01M4/505 ,  H01M4/58 ,  H01M4/02 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide lithium-manganese oxide having an excellent electrode characteristic, of which grain diameter is large and of which crystal characteristic is increased, by mixing the specified lithium compound and the manganese oxide together, and heat treating it at the specified temperature for the specified time. SOLUTION: One kind of lithium compound selected among LiOH, LiCO3 and LiNO3 and the manganese oxide are mixed together. This mixture is heated at 840-860 deg.C for 28-32 hours so as to manufacture the lithium-manganese compound for both electrodes material for a lithium secondary battery. As the manganese oxide, MnO2 to be manufactured by an electrochemical method and a chemical method is desirably used. A heat treatment process is repeated twice or more at need. The lithium compound at 10% or less is desirably added. Temperature lowering process after the heat treatment is desirably performed by lowering the temperature to the ordinary temperature through the quenching process. LiMn2 O4 is obtained as the lithium-manganese oxide.