Global Patent Index - EP 0991592 A1

EP 0991592 A1 2000-04-12 - ZWISCHEN 1,8VOLT UND

Title (en)

ZWISCHEN 1,8VOLT UND

Title (de)

ZWISCHEN 1,8 VOLT UND 4,3 VOLT WIRKENDE LITHIUM-BATTERIE

Title (fr)

ACCUMULATEUR AU LITHIUM FONCTIONNANT ENTRE 1,8 VOLTS ET 4,3 VOLTS

Publication

EP 0991592 A1 (FR)

Application

EP 99913405 A

Priority

  • FR 9900871 W
  • FR 9804624 A

Abstract (en)

[origin: FR2777387A1] The invention concerns a lithium battery operating between 1.8 volts and 4.3 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 having a spine structure obtainable by a preparation method comprising 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 the alcohols derived from linear or branched alkanes containing at least 3 carbon atoms, the 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 having a stoichiometry Li: Metal is obtained. Said method further comprises the following steps: evaporating the residual alcohol; washing the resulting powder; drying the powder; optionally, an additional step of heat treatment after drying.

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 4/131 (2010.01); 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 45/1228 (2013.01); C01G 45/1242 (2013.01); H01M 4/131 (2013.01); C01P 2002/72 (2013.01); C01P 2002/77 (2013.01); C01P 2006/40 (2013.01); H01M 10/052 (2013.01); H01M 10/0525 (2013.01)

Citation (search report)

See references of WO 9952825A1

Designated contracting state (EPC)

BE DE ES GB IT NL SE

EPO simple patent family

FR 2777387 A1 19991015; FR 2777387 B1 20000512; CA 2293841 A1 19991021; EP 0991592 A1 20000412; IL 133498 D0 20010430; JP 2002505798 A 20020219; WO 9952825 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