Method for manufacturing an electrode paste

Patent metadata

Field	Value
Publication number	US-10158116-B2
Application number	US-201314763337-A
Country	US
Kind code	B2
Filing date	Jan 25, 2013
Priority date	Jan 25, 2013
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

A method for the manufacture of a paste composition suitable for the production of an electrode for lead-acid battery, including mixing a carbon nanofiller/lead oxide composite of a first particulate size with sulphuric acid, water and further lead oxide of a second particulate size. Also, the paste thus obtained, the composite used in its manufacture, and the electrode and lead-acid battery obtained from this paste.

First claim

The invention claimed is:

1. Method for preparing a paste composition suitable for the production of an electrode of an electrode for lead-acid battery, comprising:
(a) providing a composite material comprising carbon-based nanofillers and lead oxide of a first particulate size, and
(b) mixing said composite material with sulphuric acid, water, lead oxide of a second particulate size and, optionally, at least one reinforcing filler, to thereby obtain the paste composition,
wherein the first particulate size is a different average size than the second particulate size,
wherein the composite material is obtained by grinding the carbon-based nanofillers and lead oxide to a first particulate size.

2. (Currently Amended Method according to claim 1 , wherein the composite material is obtained by:
grinding raw or oxidized carbon-based nanofillers, with lead oxide, in a weight ratio of carbon-based nanofillers relative to lead oxide ranging from 5:95 to 20:80, and
optionally shaping the resulting ground particles, to thereby obtain said composite material comprising carbon-based nanofillers and lead oxide of a first particulate size.

3. Method according to claim 1 , wherein said first particulate size is between 0.1 and 0.6 μm.

4. Method according to claim 1 , further comprising a preliminary step of preparing lead oxide prior to the manufacture of the composite material, by contacting, at high temperature, lead with air, to obtain a powder of lead oxide.

5. Method according to claim 1 , further comprising a step of preparing lead oxide during the manufacture of the composite material, by contacting, at high temperature, lead with air, in a ball mill used for the preparation of the composite material.

6. Method according to claim 5 , wherein lead is introduced in a solid form, in the presence of air, into the ball mill heated at a temperature ranging from 300° C. to 400° C.

7. Method according to claim 1 , wherein the carbon-based nanofillers are carbon nanotubes or carbon nanofibers.

8. Method according to claim 1 , wherein said second particulate size is between 0.5 and 3 μm.

9. Method according to claim 1 , wherein said first particulate size is between 0.1and 0.6 μ.m, and wherein said second particulate size is between 0.5 and 3 μm.

10. Method according to claim 1 , wherein said first particulate size is between 0.1and 0.4 μ.m, and wherein said second particulate size is between 0.5 and 3 μm.

11. Method according to claim 1 , wherein said first particulate size is between 0.2and 0.4 μ.m, and wherein said second particulate size is between 0.5 and 3 μm.

12. Method according to claim 1 , wherein the carbon-based nanofillers are carbon nanotubes.

Assignees

• Arkema France
• Vulcan Automotive Ind Ltd

Inventors

• Korzhenko Alexander
• Delprat Patrick
• Vincendeau Christophe
• Cahana Beni

Classifications

• H01M10/488

  Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density · CPC title

• H01M10/06

  Lead-acid accumulators (semi-lead accumulators H01M10/20) · CPC title

• H01M4/14 Primary

  Electrodes for lead-acid accumulators · CPC title

• Y10T29/10

  Battery-grid making · CPC title

• Y10T29/11

  Bias [i.e. , helically] cutting of tubular stock · CPC title