# US 2013/0280413 A1 · Electrode material applying apparatus and filtering apparatus

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- Number: US 2013/0280413 A1
- Document ID: US20130280413A1
- Status: Published application
- Kind: A1
- Application number: 13/978,886
- Filed: 2011-01-13
- Published: 2013-10-24
- Earliest claimed: 2011-01-13
- Inventors: Yozo Uchida
- Web page: https://patentgrep.com/patent/US20130280413A1

## CPC

- H01M 4/1393: of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

An electrode material applying apparatus 14 includes a flow path 14a which allows passage of slurry containing at least graphite particles dispersed in a solvent, a filter 14b disposed in the flow path 14a, magnets 14c1 and 14c2 disposed so as to generate, on the filter 14b, a magnetic field having magnetic lines of force extending along the flow path 14a, and an applying member 14d which applies, on a current collector, the slurry having passed through the filter 14b.

## Claims

### Claim at position 1

-10. (canceled)

### Claim 11

An electrode material applying apparatus comprising:
a flow path which allows passage of slurry containing at least graphite particles dispersed in a solvent,
wherein
the graphite particles having a laminar structure in which hexagonal plate-like crystals are stacked so as to form a plurality of layers thereof;
a filter disposed in the flow path;
a magnet disposed so as to generate, on the filter, a magnetic field having magnetic lines of force extending along the flow path, thereby orienting planes of the crystals of the graphite particles having the laminar structure parallel to the magnetic lines of force; and
an applying member which applies, on a current collector, the slurry having passed through the filter.

### Claim 12 (depends on 11)

The electrode material applying apparatus according to claim 11,
wherein
the magnet is formed of a pair of magnets which are disposed so as to sandwich the filter along the flow path and respectively have magnetic polarities attracting each other at portions facing the filter.

### Claim 13 (depends on 11)

The electrode material applying apparatus according to claim 11,
wherein
the graphite is flake graphite.

### Claim 14 (depends on 11)

The electrode material applying apparatus according to claim 11,
wherein
the magnet is formed of a permanent magnet or an electromagnet.

### Claim 15

A method for filtering slurry by supplying slurry containing at least graphite particles dispersed in a solvent to a flow path while generating, on a filter disposed in the flow path, a magnetic field having magnetic field lines extending along the flow path, the graphite particles having a laminar structure in which hexagonal plate-like crystals are stacked so as to form a plurality of layers thereof, thereby orienting planes of the crystals of the graphite particles having the laminar structure parallel to the magnetic field lines to filter the slurry.

### Claim 16 (depends on 15)

A method for producing a secondary battery, comprising:
filtering slurry by the method for filtering slurry according to claim 15; and
applying, on a current collector, the slurry filtered.