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Dispersing mixer system used in producing slurry containing carbon and producing method of slurry containing carbon

A manufacturing method and mixing system technology, applied in the direction of mixing methods, mixers, fluid mixers, etc., can solve the problems of coating voids, difficulty, poor dispersion and solubility, etc., to reduce the mixing of air bubbles and simplify degassing Process effect

Inactive Publication Date: 2015-02-25
NIHON SPINDLE MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although solid components such as positive electrode active materials or negative electrode active materials, conductive materials, and binders, and solvents such as water are put into such as Figure 9 The dispersion and mixing of solid components (including the dissolution of soluble solid components) are carried out in the batch multi-shaft mixer shown to obtain the above slurry. However, when carbon used as a conductive substance, especially the aspect ratio In the case of fibrous toner with a large (length / diameter), or a substance with poor dispersibility and solubility such as CMC (carboxymethyl cellulose) used as a binder, it may be difficult to obtain a uniform pulp materials, or it is difficult to maintain the state of dispersion and mixing of solid components, or the dispersion and mixing of solid components takes time, etc.
[0007] In addition, when using the above-mentioned batch type multiaxial mixer, air bubbles are easily mixed in and remain in the slurry. If the slurry mixed with air bubbles is applied to the substrate of the electrode and heated and dried, the coating will problems with voids

Method used

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  • Dispersing mixer system used in producing slurry containing carbon and producing method of slurry containing carbon
  • Dispersing mixer system used in producing slurry containing carbon and producing method of slurry containing carbon
  • Dispersing mixer system used in producing slurry containing carbon and producing method of slurry containing carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0193] (High rate discharge test)

[0194] As shown in Table 1, LiFePO is used as a slurry material used in the manufacture of electrodes for non-aqueous electrolyte secondary batteries, that is, a material that absorbs and releases alkali metal ions. 4 (91wt%), carbon (carbon black (2wt%), fibrous carbon powder with an aspect ratio of 10 to 1000, and an average fiber diameter of 1 to 500nm carbon (carbon nanotubes) (2wt%)), and water-based binder (CMC (carboxymethylcellulose) (5wt%)) (solid content ratio: 31wt%), using water as the solvent R, and using the dispersion mixing system 100 equipped with the dispersion mixing pump Y to produce a slurry.

[0195] In addition, Fig. 10(a) and Fig. 10(b) show electron micrographs of the surface of the electrode coated with the carbon-containing slurry and the cross-section of the electrode (Fig. 10(a) is based on a conventional batch multiaxial mixer The photo of Figure 10(b) is a photo of the manufacturing method of carbon-containing...

Embodiment 2

[0204] (High rate discharge test)

[0205] As shown in Table 2, as a slurry material used in the manufacture of electrodes for non-aqueous electrolyte secondary batteries, that is, a material that absorbs and releases alkali metal ions, LiFePO 4 (89wt%), carbon (carbon black (1.5wt%), carbon (carbon nanotubes) with an aspect ratio of 10-500 fibrous carbon powder and an average fiber diameter of 150nm (1.5wt%), activated carbon (3wt%) ) and a water-based adhesive (acrylate (5wt%)) (solid content ratio: 37wt%), using water as the solvent R, and using the dispersion mixing system 100 equipped with the dispersion mixing pump Y to produce a slurry.

[0206] Test electrode (positive electrode) After coating each of the obtained slurries on an aluminum foil with a thickness of 20 μm and drying, the aluminum foil and the coating film were adhered and bonded by a roller press, and then heat treatment (under reduced pressure, at 150 °C for more than 12 hours) to obtain a positive elect...

Embodiment 3

[0225] As shown in Table 3, as a slurry material used in the manufacture of electrodes for non-aqueous electrolyte secondary batteries, that is, a material that absorbs and releases alkali metal ions, LiMn 0.33 Ni 0.33 co 0.33 o 2 (91wt%), carbon (carbon black (2wt%), carbon (carbon nanotubes) (2wt%) of fibrous carbon powder with an aspect ratio of 10 to 500 and an average fiber diameter of 150nm (2wt%), and a water-based binder (acrylic Esters (5 wt %)) (solid content ratio: 32 wt %), using water as the solvent R, and using the dispersion mixing system 100 equipped with the dispersion mixing pump Y to produce a slurry.

[0226] [table 3]

[0227]

[0228] Test electrode (positive electrode) After coating each of the obtained slurries on an aluminum foil with a thickness of 20 μm and drying, the aluminum foil and the coating film were adhered and bonded by a roller press, and then heat treatment (under reduced pressure, at 150 °C for more than 12 hours) to obtain a posi...

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Abstract

The invention provides a dispersing mixer system equipped with a dispersing mixer pump used in producing slurry containing carbon and producing method of slurry containing carbon. The dispersing mixer system is provided with the following dispersing mixer pump that: a rotator of a rotation wing is eccentrically arranged in a cylindrical housing body, and by rotating and driving the rotator, solid ingredient and solvent are absorbed to a first guide-in chamber formed in the cylindrical housing body via a first supplying part; by using the rotation wing to stir, the solid ingredient and the solvent are spitted out from a spitting chamber via a discharging chamber; liquid spitted from the spitting part is circulated to a second supplying part via a circulation flow path; the liquid is absorbed to a second guide-in chamber formed by being separated from the first guide-in chamber via a separator plate from the second supplying part towards the interior of the cylindrical housing body; the liquid is allowed to pass a throttle flow path formed on a stator, after being stirred by the rotation wing, and is spitted out from the spitting part from the discharging chamber; and then the liquid spitted out from the spitting part is circulated to the a second supplying part via the circulation flow path.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2013-167307 filed on August 12, 2013. The entire content of this application is incorporated in this specification by reference. technical field [0002] The present invention relates to a kind of dispersion mixing system and the manufacturing method of carbonaceous slurry that are equipped with the dispersing mixing pump that is used to manufacture carbonaceous slurry, particularly relate to a kind of equipment that is used in the manufacture of the electrode that contains in non-aqueous electrolyte secondary battery. A dispersive mixing system of a dispersive mixing pump for a carbon slurry used in the invention and a method for manufacturing a carbon-containing slurry. Background technique [0003] In the past, as non-aqueous electrolyte secondary batteries, lithium-ion secondary batteries have been widely used in various electronic devices such as personal computers and mobile devices. Howev...

Claims

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Application Information

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IPC IPC(8): B01F13/10B01F15/02B01F3/12H01M4/62H01M10/05B01F25/60
CPCY02E60/10H01M4/139H01M10/0525
Inventor 别惣俊二浅见圭一
Owner NIHON SPINDLE MFG CO LTD
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