Electrode mixture paste, electrode, and non-aqueous electrolyte rechargeable battery

Patent metadata

Field	Value
Publication number	US-9508986-B2
Application number	US-201113882760-A
Country	US
Kind code	B2
Filing date	Nov 22, 2011
Priority date	Nov 29, 2010
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

The present invention provides an electrode mixture paste containing an electrode active material, a conductive material, a binder, and an organic solvent. The electrode active material has a sodium-containing transition metal compound, the binder has a polymer soluble to the organic solvent, and the polymer does not have a structural unit derived from vinylidene halide.

First claim

The invention claimed is:

1. An electrode mixture paste comprising an electrode active material, a conductive material, a binder, and an organic solvent, wherein the electrode active material comprises a sodium-containing transition metal compound, the binder comprises a polymer soluble in the organic solvent, and the polymer has no structural unit derived from a vinylidene halide, wherein the polymer has the following structural unit (A) in the main chain and a glass transition temperature of −50° C. to 0° C., and includes an olefin polymer:
CHR 1 —CR 2 R 3   (A)

wherein R 1 and R 2 are each independently a hydrogen atom, a carboxyl group, or a divalent hydrocarbon group,
R 3 is a hydrogen atom, a hydroxyl group, a thiol group, an ester group, an aryl group, a nitrile group, an amino group, an amide group, a cyclic amide group, a carboxyl group, an ether group, a phosphate group, a sulfonate group, a carboxylic acid ester group, or an inorganic acid ester group, and
when the polymer has a plurality of structural units (A),
R 1 groups may be the same or different,
R 2 groups may be the same or different,
R 3 groups may be the same or different, and
R 1 , R 2 and R 3 may be the same or different, excluding the case where all of R 1 , R 2 and R 3 are hydrogen in structural unit (A), and

the sodium-containing transition metal compound is represented by the following formula (B):
Na x Mo 2   (B)

wherein M is one or more elements selected from the group consisting of Fe, Ni, Co, Mn, Cr, V, Ti, B, Al, Mg and Si, x is not less than 0.7 and not more than 1.2, and the sodium-containing transition metal compound has an O 3 type layered structure.

2. The electrode mixture paste according to claim 1 , wherein the amount of water contained in the electrode mixture paste is 30000 ppm or less.

3. An electrode produced by applying an electrode mixture paste as defined in claim 1 on a current collector.

4. A non-aqueous electrolyte secondary battery having the electrode as defined in claim 3 as a positive electrode.

5. The non-aqueous electrolyte secondary battery according to claim 4 further having a separator.

Assignees

• Kageura Jun-Ichi
• Sumitomo Chemical Co

Inventors

• Kageura Jun-Ichi

Classifications

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M4/131 Primary

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title