# US 10,312,519 B2 · Method for manufacturing electroconductive paste, and electroconductive paste

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- Number: US 10,312,519 B2
- Document ID: US10312519B2
- Status: Granted
- Kind: B2
- Application number: 15/529,561
- Filed: 2015-11-19
- Published: 2017-11-16
- Granted: 2019-06-04
- Earliest claimed: 2014-11-26
- Assignees: Showa Denko K.K.
- Applicants: Show Denko K.K.
- Inventors: Takeshi Nakamura; Yuta Hirano; Akihiro Kitazaki
- Web page: https://patentgrep.com/patent/US10312519B2

## CPC

- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- C01B 32/05: Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
- H01B 1/24: the conductive material comprising carbon-silicon compounds, carbon or silicon
- H01B 13/00: Apparatus or processes specially adapted for manufacturing conductors or cables
- H01G 11/36: Nanostructures, e.g. nanofibres, nanotubes or fullerenes
- H01G 11/38: Carbon pastes or blends; Binders or additives therein
- H01G 11/86: specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34)
- H01M 4/043: {involving compressing or compaction}
- H01M 4/139: Processes of manufacture
- H01M 4/625: {Carbon or graphite}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- Y02E 60/13: Energy storage using capacitors
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method for producing an electrically conductive paste, including a step of manufacturing paste A by exerting a cavitation effect in mixed liquid A containing multi-walled carbon nanotubes and a solvent, a step of manufacturing paste B from mixed liquid B containing carbon black particles, graphitized carbon nanofibers and a solvent, and a step of mixing paste A and paste B.

## Claims

### Claim 1

A method for producing an electrically conductive paste, comprising a step of manufacturing a paste A by exerting a cavitation effect on a mixed liquid A containing multi-walled carbon nanotubes and a solvent, a step of manufacturing a paste B from a mixed liquid B containing carbon black particles, graphitized carbon nanofibers and a solvent, and a step of mixing the paste A and the paste B.

### Claim 2 (depends on 1)

The method for producing an electrically conductive paste as claimed in claim 1, comprising a method of adding a dispersing agent to the mixed liquid A and/or the mixed liquid B.

### Claim 3 (depends on 1)

The method for producing an electrically conductive paste as claimed in claim 1, further comprising a method of applying shear force to the mixed liquid A.

### Claim 4 (depends on 3)

The method for producing an electrically conductive paste as claimed in claim 3, in which the method of exerting a cavitation effect on and applying shear force to the mixed liquid A is a method of allowing the mixed liquid A to pass through a nozzle at a pressure within a range of 100 MPa or more and less than 250 MPa.