US 2010/0140540 A1 · Method For Producing Positive Electrode Material For Secondary Battery

Abstract

The present invention has features in that a lithium transition metal silicate obtained by sintering a mixture containing a transition metal compound containing at least one transition metal selected from the group consisting of Mn, Fe, Co and Ni; a lithium compound; and a silicon-based polymer compound, is used as a positive electrode material for a secondary battery. The lithium transition metal silicate of the present invention has a high lithium occlusion and release efficiency per unit amount of a transition metal. A secondary battery in which the cost is low, stability and safety are high, and superior charge and discharge characteristics are exhibited can be provided.

Claims12

Dependent claims

A method for producing a positive electrode material for a secondary battery containing a lithium transition metal silicate represented by the following formula:

LiaMbSicO4
wherein M is at least one transition metal selected from the group consisting of Mn, Fe, Co and Ni;
a, b and c are numbers satisfying 1<a≦3, 0.5≦b≦1.5, and 0.5≦c≦1.5,
said method comprising the step of obtaining said lithium transition metal silicate by sintering a mixture containing at least
(A) at least one transition metal selected from the group consisting of Mn, Fe, Co and Ni, and/or a transition metal compound containing the aforementioned transition metal;
(B) a lithium compound;
and
(C) a silicon-based polymer compound.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/532,956Filed 26 Mar 2008

Priority

JP JP2007-08210227 Mar 2007

Published

10 Jun 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

H01M 4/5825
Of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures,…:…
H01M 4/505
Of manganese: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525
Of nickel, cobalt or iron: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g.…
H01M 4/136
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…

Method For Producing Positive Electrode Material For Secondary Battery

Life of this patent

Method For Producing Positive Electrode Material For Secondary Battery

Life of this patent

Abstract

Claims12