Non-aqueous secondary battery and electrodes for use in same
A secondary battery, non-aqueous technology, applied in secondary batteries, secondary battery manufacturing, non-aqueous electrolyte storage batteries, etc., can solve the problems of non-aqueous secondary battery temperature rise, non-aqueous secondary battery thermal runaway, etc., to achieve Effect of suppressing internal short circuit and improving safety
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Embodiment 1
[0124] Follow the steps below, such as image 3 Make an electrode set as shown, use this electrode set to make figure 2 A prismatic non-aqueous secondary battery 30 is shown.
[0125] (1) Production of positive plate
[0126] 100 parts by weight of lithium cobaltate as an active material, 2 parts by weight of acetylene black as a conductive material, and 2 parts by weight of polyvinylidene fluoride (PVdF) as a binding material together with an appropriate amount of N-methyl-2-pyrrolidone Stir and knead with a double-arm mixer to prepare the positive electrode mixture paint.
[0127] The positive electrode mixture paint was applied to both surfaces of an aluminum foil (thickness: 15 μm) serving as the positive electrode current collector 11 and dried to form a positive electrode active material layer. The thicknesses of the dried positive electrode active material layers were each 100 μm. Next, compress until the thickness of the positive electrode active material layer is...
Embodiment 2
[0138] Follow the steps below, such as Figure 4 The electrode set was fabricated as shown, and the electrode set was used to fabricate figure 2A prismatic non-aqueous secondary battery 30 is shown.
[0139] The same materials as in Example 1 were used for the positive electrode plate 14, the negative electrode plate 24, and the separators 31a and 31b. The spacer 10 was produced by cutting a vinylidene fluoride·tetrafluoroethylene·hexafluoropropylene copolymer (THV) having a thickness of 5 μm into the width of the negative electrode plate 24 and the length of the negative electrode active material layers 22a and 22b. The spacer is glued to the membrane by thermally fusing its ends.
[0140] The positive electrode plate 14, the separator 31b with the spacer 10 pasted, the negative electrode plate 24, and the spacer 10 pasted thereon are sequentially arranged in such a manner that the two spacers 10 are in contact with the negative electrode active material layers 22a, 22b fo...
Embodiment 3
[0143] Follow the steps below, such as Figure 6 The electrode set was fabricated as shown, and the electrode set was used to fabricate figure 2 A prismatic non-aqueous secondary battery 30 is shown.
[0144] The same materials as in Example 1 were used for the positive electrode plate 14 , the negative electrode plate 24 , and the separator 31 . The spacer 10 was prepared by adding vinylidene fluoride·tetrafluoroethylene·hexafluoropropylene copolymer (THV) (vinylidene fluoride:tetrafluoroethylene:hexafluoropropylene=35:35:30) with a thickness of 10 μm, EC at 25°C. :MEC:DEC=20:30:50 (weight ratio), the amount of resin dissolved in 100g of the mixed solvent (solubility) is 5g) was cut into the width of the negative electrode plate 24 and the length was 10mm. The spacer is glued to the membrane by thermally fusing its ends.
[0145] The positive plate 14, the diaphragm 31, the negative plate 24, and the diaphragm 31 pasted with a plurality of spacers 10 are sequentially arra...
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Abstract
Description
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