公开(公告)号：JPH11176444A

公开(公告)日：1999-07-02

申请号：JP21285498

申请日：1998-07-28

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KYO SEIKYU ,  CHO SHUNKO ,  CHO KIKO

IPC: C01G45/12 ,  C01B31/02 ,  H01M4/505 ,  H01M10/05 ,  H01M10/052 ,  H01M10/0565 ,  H01M10/0566 ,  H01M4/58 ,  H01M4/02 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide a battery having superior capacity and performance in high voltage area by subjecting the lithium oxide to heat treatment, the chrome oxide and the manganese oxide for a specified time in a specified temperature area, and thereafter, gradually cooling them so as to form a specified compound. SOLUTION: Heat treatment is conducted in a temperature area at 730-760 deg.C for 40-50 hours, and thereafter gradual cooling is performed to form a compound having a formula LiCrx Mn2-x O4 (0

公开(公告)号：JPH11250912A

公开(公告)日：1999-09-17

申请号：JP36494998

申请日：1998-12-22

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KYO SEIKYU ,  CHO SHUNKO ,  CHO KIKO ,  RYU KOZEN

IPC: C01G49/00 ,  C01B31/02 ,  H01M4/505 ,  H01M4/525 ,  H01M10/05 ,  H01M10/052 ,  H01M10/0565 ,  H01M10/0566 ,  H01M4/58 ,  H01M4/02 ,  H01M10/40

Abstract: PROBLEM TO BE SOLVED: To provide a lithium secondary battery having a cathode material with less capacity loss in a high voltage (5 volt) region and excellent cycle characteristics and provide a manufacturing method of an oxide for the cathode material. SOLUTION: A lithium secondary battery has a cathode made of lithium-iron- manganese oxide (LiFex Mn2-x O4 , 0