GRAPHENE DISPERSION, PROCESS FOR PRODUCING SAME, PROCESS FOR PRODUCING PARTICLES OF GRAPHENE/ACTIVE MATERIAL COMPOSITE, AND PROCESS FOR PRODUCING ELECTRODE PASTE

Title:

GRAPHENE DISPERSION, PROCESS FOR PRODUCING SAME, PROCESS FOR PRODUCING PARTICLES OF GRAPHENE/ACTIVE MATERIAL COMPOSITE, AND PROCESS FOR PRODUCING ELECTRODE PASTE

Document Type and Number:

WIPO Patent Application WO/2017/047521

Kind Code:

A1

Abstract:

The purpose of the present invention is to provide graphene in a form that renders the graphene highly dispersible and enables the graphene to retain high electroconductivity and ionic conductivity when used as a raw material for producing electrode materials. The present invention is a graphene dispersion which includes graphene dispersed in a solvent including 50 mass% or more N-methylpyrrolidone. When this graphene dispersion is diluted with N-methylpyrrolidone to a graphene content by weight of 0.000013, the dilution has a weight absorptivity coefficient, as measured at a wavelength of 270 nm and calculated using the following equation (1), of 25,000-200,000 cm-1. Weight absorptivity coefficient (cm-1) = absorbance/{0.000013×(optical path length (cm) of cell)} (1)

Inventors:

MANABE KOICHIRO (JP)
TAMAKI EIICHIRO (JP)
KAWASAKI MANABU (JP)

Application Number:

PCT/JP2016/076654

Publication Date:

March 23, 2017

Filing Date:

September 09, 2016

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TORAY INDUSTRIES (JP)

International Classes:

H01G11/36; H01G11/38; H01M4/04; H01M4/139; H01M4/36; H01M4/62

Domestic Patent References:

WO2014140324A1	2014-09-18
WO2015122498A1	2015-08-20

Foreign References:

JP2015059079A	2015-03-30
JP2014009151A	2014-01-20
JP2015520109A	2015-07-16

Other References: