Separator for electrochemical device, method for producing the same, and electrochemical device
A technology for electrochemical components and manufacturing methods, applied in electrical components, battery pack components, secondary battery components, etc., can solve the problems of expensive materials and difficult to manufacture, and achieve the effect of excellent safety
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Embodiment 1
[0148]
[0149] Urethane acrylate as an oligomer: 11 parts by mass, dipentoxylated pentaerythritol diacrylate as a monomer: 3 parts by mass, 2,4,6-trimethyl Benzoyldiphenylphosphine oxide: 0.4 parts by mass, boehmite (average particle diameter: 0.6 μm) as inorganic fine particles (B): 30 parts by mass, and MIBK (SP value: 8.4) as solvent (a) : To 55 parts by mass, zirconia beads with a diameter of 1 mm in an amount 5 times (mass basis) relative to boehmite were added, uniformly stirred for 15 hours using a ball mill, and then filtered to prepare a slurry for forming a separator.
[0150] Pass the non-woven fabric made of PET with a thickness of 12 μm through the above slurry, and apply it by pull-up coating. After the slurry is coated, it passes between gaps with a predetermined interval, and then the illuminance is 1081mW / cm 2 It was irradiated with ultraviolet rays having a wavelength of 365 nm for 10 seconds, and then dried to obtain a separator with a thickness of 20 μm....
Embodiment 2
[0164] Except that the amount of urethane acrylate was 8 parts by mass and the amount of dipentoxylated pentaerythritol diacrylate was 5 parts by mass, the same procedure as in Example 1 was carried out to prepare a slurry for separator formation, except Except using this slurry, it carried out similarly to Example 1, and produced the separator with thickness 20 micrometers. The volume V of the resin (A) in the separator A and the volume V of inorganic particles (B) B ratio of V A / V B is 1.2.
[0165] Then, except having used this separator, it carried out similarly to Example 1, and produced the nonaqueous electrolyte secondary battery.
Embodiment 3
[0167] Except that the amount of boehmite was 15 parts by mass, a slurry for forming a separator was prepared in the same manner as in Example 1, and a 20-μm-thick slurry was produced in the same manner as in Example 1 except that this slurry was used. clapboard. The volume V of the resin (A) in the separator A and the volume V of inorganic particles (B) B ratio of V A / V B is 2.6.
[0168] Then, except having used this separator, it carried out similarly to Example 1, and produced the nonaqueous electrolyte secondary battery.
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