Conductive material dispersion, and electrode and lithium secondary battery produced using same
A technology of conductive materials and dispersions, used in secondary batteries, non-aqueous electrolyte battery electrodes, electrode manufacturing, etc., can solve problems such as increased viscosity, decreased storage stability, gelation, etc. Viscosity characteristics, the effect of improving productivity
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[0119] The electrolyte may be an organic liquid electrolyte, an inorganic liquid electrolyte, a solid polymer electrolyte, a gel-type polymer electrolyte, a solid inorganic electrolyte, a melt-type inorganic electrolyte, and the like, which can be used in the preparation of a lithium secondary battery, but is not limited thereto.
[0120] Specifically, the electrolyte may include a non-aqueous organic solvent and a lithium salt.
[0121] As the nonaqueous organic solvent, for example, aprotic solvents such as N-methyl-2-pyrrolidone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, γ- Butyrolactone, 1,2-dimethoxyethane, tetrahydrofuran (franc), 2-methyltetrahydrofuran, dimethyl sulfoxide, 1,3-dioxolane, formamide, dimethylformamide, di Oxolane, acetonitrile, nitromethane, methyl formate, methyl acetate, phosphate triester, trimethoxymethane, dioxolane derivatives, sulfolane, methylsulfolane, 1,3-dimethyl-2- imidazolidinone, pr...
specific Embodiment
[0126] Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention can be embodied in many different forms and is not limited to the embodiments set forth herein.
[0127] The specifications of each component used in the following Examples and Comparative Examples are as follows.
[0128] (A) Main dispersant
[0129] (A1) Hydrogenated acrylonitrile-butadiene rubber (H-NBR) having a weight average molecular weight of 260,000 g / mol (weight ratio of acrylonitrile:hydrogenated butadiene=34:66) was used.
[0130] (A2) Hydrogenated acrylonitrile-butadiene rubber (H-NBR) having a weight average molecular weight of 34,000 g / mol (weight ratio of acrylonitrile:hydrogenated butadiene=34:66) was used.
[0131] (B) Auxiliary dispersant
[0132] As the auxiliary dispersant, the following copolymers of each of (B1) to (B24) are used, and in the copolymers of each o...
Embodiment 1 to 34
[0165] In a 1 L container, the components listed in the following Table 2 as the main dispersant (A), auxiliary dispersant (B) and conductive material (C) were added in the weight % described in the following [Table 2] into N-methylpyrrolidone to prepare 500 g of a mixed solution. After that, use a saw type impeller (saw type impeller) (VMA-GETZMANN Co., Ltd., DISPERMAT CN20) with a diameter of 80 mm to mix with 5,000 rpm for 60 minutes, and then use a bead mill filled with 500 g of 1 mm zirconia beads ( Netzsch Co., Ltd., Mini-Cer) for 60 minutes.
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