Global Patent Index - EP 0991593 A1

EP 0991593 A1 2000-04-12 - LITHIUM BATTERY OPERATING UP TO AN UPPER VOLTAGE BOUNDARY OF 3.5 VOLTS

Title (en)

LITHIUM BATTERY OPERATING UP TO AN UPPER VOLTAGE BOUNDARY OF 3.5 VOLTS

Title (de)

LITHIUM-BATTERIE ARBEITEND BIS AUF EINE SPANNUNGSHÖHE VON 3,5VOLT

Title (fr)

ACCUMULATEUR AU LITHIUM FONCTIONNANT JUSQU'A UNE BORNE SUPERIEURE DE TENSION DE 3,5 VOLTS

Publication

EP 0991593 A1 (FR)

Application

EP 99913406 A

Priority

  • FR 9900872 W
  • FR 9804625 A

Abstract (en)

[origin: FR2777388A1] The invention concerns a lithium battery operating up to an upper voltage boundary of 3.5 volts and comprising a negative electrode, an electrolyte and a positive electrode characterised in that said positive electrode comprises as active material, and before it has been subjected to a particular charging or discharging operation, a manganese oxide containing lithium or extra lithium obtainable by the following three steps performed successively or simultaneously: preparing a lithium alkoxide solution by dissolving metal lithium in the corresponding alcohol, said alcohol being selected among alcohols derived from linear or branched alkanes containing at least 3 carbon atoms, alcohols derived from unsaturated aliphatic hydrocarbons, and their mixtures; adding a manganese oxide powder to said lithium alkoxide solution to obtain a dispersion; controlled reduction of said manganese oxide by said alkoxide until a manganese oxide containing lithium or extra lithium with a stoichiometry Li: Metal is obtained. Said method further comprises the following steps: evaporating the residual alcohol; washing the resulting powder; drying the powder.

IPC 1-7 (main, further and additional classification)

C01G 45/00; H01M 4/50

IPC 8 full level (invention and additional information)

C01G 45/00 (2006.01); H01M 4/50 (2010.01); H01M 4/505 (2010.01); H01M 10/052 (2010.01); H01M 10/0525 (2010.01); H01M 10/36 (2010.01)

CPC (invention and additional information)

H01M 4/505 (2013.01); C01G 45/02 (2013.01); C01G 45/1228 (2013.01); C01P 2002/54 (2013.01); C01P 2002/72 (2013.01); C01P 2006/40 (2013.01); H01M 10/052 (2013.01); H01M 10/0525 (2013.01)

Designated contracting state (EPC)

BE DE ES GB IT NL SE

EPO simple patent family

FR 2777388 A1 19991015; FR 2777388 B1 20000512; CA 2293842 A1 19991021; EP 0991593 A1 20000412; IL 133497 D0 20010430; JP 2002506561 A 20020226; WO 9952826 A1 19991021

INPADOC legal status


2003-04-16 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20021011

2001-05-30 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010412

2000-04-12 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991206

2000-04-12 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES GB IT NL SE