Title:
PRODUCTION OF ACTIVE MATERIAL OF POSITIVE ELECTRODE FOR SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2945377
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing an active material of a positive electrode for a nonaqueous electrolyte secondary battery, especially a lithium ion secondary battery, excellent in durability in cycling and hardly deteriorating charge and discharge characteristics.
SOLUTION: At least one of a hydroxide, an oxyhydroxide or an oxide of a nonmanganese metallic element selected from aluminum, magnesium, vanadium, chromium, iron, cobalt, nickel and zinc is made to adhere to the surface of a powder comprising a lithium manganese compound oxide represented by the formula LixMyMn2-xOz [M denotes a nonmanganese element; (x), (y) and (z) denote each a number within the range of 0.5<(x)≤1.2; 0<(y)≤0.2 and 3.8<(z)≤4.2] and the resultant powder is then heated. The adhesion of at least one of the hydroxide, oxyhydroxide or oxide is carried out by reacting an aqueous solution containing the salt of the nonmangenese metallic element with an alkali consisting essentially of sodium hydroxide or potassium hydroxide or a salt thereof with a weak acid.
Inventors:
KANAI HIROYUKI
Application Number:
JP12336998A
Publication Date:
September 06, 1999
Filing Date:
May 06, 1998
Export Citation:
Assignee:
KAO KK
International Classes:
C01G45/00; C01G45/02; H01M4/02; H01M4/04; H01M4/36; H01M4/505; H01M4/525; (IPC1-7): H01M4/58; C01G45/02; H01M4/02
Domestic Patent References:
| JP7288127A | ||||
| JP8222219A | ||||
| JP8162114A | ||||
| JP8236114A |
Attorney, Agent or Firm:
Kaoru Furuya (3 outside)
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