US 8,273,267 B2 · Method for producing positive electrode active material for battery

Abstract

It is an object of the present invention to provide a method for producing a positive electrode active material for a battery, which can realize easy regulation of pore size in porosity formation of a positive electrode active material and is less likely to undergo hindrance of ion conduction caused by residues and, thus, can realize excellent high-rate discharge characteristics, and a method for producing a composition for a battery using the positive electrode active material for the battery. The method for producing a positive electrode active material for a battery of the present invention is a method for producing a positive electrode active material for a battery, including: a step 1 of firing a mixture of a raw material for the positive electrode active material and carbon particles to remove the carbon particles; and a step 2 of milling and classifying a fired body obtained in the step 1.

Claims9

Dependent claims

A method for producing a positive electrode active material for a battery, comprising:

a step 1 of firing a mixture of a raw material for the positive electrode active material and carbon particles to remove the carbon particles, wherein an inner temperature of a furnace in which the mixture is fired reaches a firing temperature T of 700-900° C. at an average temperature rising rate of 300-600° C./hr and the mixture is fired at the firing temperature T for a firing time H wherein H=[8500/10(1+T/273)] to [128,000/10(1+T/273)] hr;
and
a step 2 of milling and classifying a fired body obtained in the step 1.

Dependencies are inferred from the claim text.

Facts

Application

12/593,253Filed 7 Apr 2008

Priority

JP 2007-1014149 Apr 2007

Published

US 2010/0117031 A113 May 2010

Granted

25 Sep 2012

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H01M 4/139
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: processes of manufacture
H01M 4/0471
Processes of manufacture in general: involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal…
H01M 4/131
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/1391
Processes of manufacture: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx

Method for producing positive electrode active material for battery

Life of this patent

Method for producing positive electrode active material for battery

Life of this patent

Abstract

Claims9