Graphene/organic solvent dispersion and method for producing same, and method for producing lithium-ion battery electrode
AssigneeToray Industries, Inc.
InventorsHanxiao Yang, Eiichiro Tamaki, Manabu Kawasaki, Yoshihide Hirai, Koki Miyazono
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Abstract
A graphene/organic solvent dispersion liquid is in a stably dispersed state and also unlikely to cause electrolysis of water. A graphene/organic solvent dispersion liquid is also provided including graphene dispersed in an organic solvent and having a value of (W2−W1)/G in the range of 0.005 or more and 0.05 or less, wherein W1 and W2 are the water fractions measured at 130° C. and 250° C., respectively, by the Karl Fischer's method and G is the solid fraction of the graphene.
Claims15
A graphene/organic solvent dispersion liquid comprising graphene dispersed in an organic solvent and having a value of (W2−W1)/G in the range of 0.005 or more and 0.05 or less, wherein W1 and W2 are the water fractions measured at 130° C. and 250° C., respectively, by the Karl Fischer's method and G is the solid fraction of the graphene.
A production method for the graphene/organic solvent dispersion liquid comprising the following steps performed in this order:
- a reduction step for reducing graphene oxide dispersed in a water-containing dispersion medium;
- an organic solvent mixing step for mixing the intermediate dispersion liquid resulting from the reduction step with an organic solvent;
- a strong stirring step for stirring the intermediate dispersion liquid containing an organic solvent at a shear rate of 5,000 per second to 50,000 per second;
- and
- a water removal step for removing at least part of the water from the intermediate dispersion liquid by a combination of the addition of an organic solvent and suction filtration or by distillation.
Dependencies are inferred from the claim text.