Slurry
A slurry and peel strength technology, applied in the direction of sustainable manufacturing/processing, structural parts, final product manufacturing, etc., can solve the problems of long drying time and reduced production efficiency, and achieve the effect of maintaining thickness and inhibiting convection
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preparation example 1
[0172] Preparation example 1 (preparation of cellulose nanofiber (CNF) slurry)
[0173] Commercially available hardwood pulp was suspended with water to obtain 100 L of a 1% by weight slurry liquid (1).
[0174] Next, using a disc refiner (manufactured by Hasegawa Iron Works Co., Ltd., trade name "SUPERFIBRATER 400-TFS"), the gap was set at 0.15 mm and the disc rotation speed was 1750 rpm, and the obtained slurry liquid was subjected to 10 times of beating treatment. Refining treatment.
[0175] Further, the 1% by weight slurry liquid after the refining treatment was homogenized 50 times at a treatment pressure of 50 MPa using a homogenizer (manufactured by Gaulin Corporation, trade name "15M8AT") equipped with a crushing type homogenizing valve seat.
[0176] The 1% by weight slurry liquid after the refining treatment and the homogenization treatment was repeatedly filtered through gauze to obtain a slurry liquid with a non-volatile matter concentration of 9.9% by weight.
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Embodiment 1
[0180] (manufacturing of slurry)
[0181] 84 g of the CNF slurry liquid (1) obtained in Preparation Example 1 was put into a polypropylene container, and 1.5% by weight of CMC aqueous solution (CMC: carboxymethylcellulose sodium salt, decomposition temperature: 290° C. or higher, 1 wt. Viscosity of % aqueous solution at 25° C., 60 revolutions: 1500 to 3000 mPa s, manufactured by Daicel FineChem Co., Ltd., model 2200) 67.5 g, further adding 99.0 g of artificial graphite (average particle diameter: about 20 μm) as an active material, and using A homodisperser (manufactured by Tokukuki Kagaku Kogyo Co., Ltd., model L) was stirred at 3000 rpm for 30 minutes to obtain a slurry (1). The viscosity (complex viscosity measured at a frequency of 1 Hz using an MCR rheometer) at 25° C. of the obtained slurry (1) was 9.745 Pa·s.
[0182] (manufacturing of electrodes)
[0183] The obtained slurry (1) was applied to a square copper foil having a thickness of 15 μm and a side length of 150 ...
Embodiment 2
[0192] In the (manufacturing of electrode) process, it carried out similarly to Example 1 except having changed drying conditions from 60 degreeC*30 minutes to 80 degreeC*22.5 minutes.
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