Electrode for non-aqueous secondary battery and non-aqueous secondary battery using the same
A non-aqueous secondary battery and electrode technology, which is applied in battery electrodes, secondary batteries, non-aqueous electrolyte storage batteries, etc. The effect of increasing the effective area and improving the cycle characteristics
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Embodiment 1
[0057] Cut off a piece of electrolytic copper foil (manufactured by Furukawa Saichitsutofoil Co., Ltd.) with a thickness of 10 μm and a size of 3 cm×5 cm, and put it in a 10% container heated to 40° C. In sulfuric acid, take it out after soaking for 4 minutes, and put it into a mixture of sodium hydroxide 5g / liter, sodium orthosilicate 20g / liter, sodium carbonate (anhydrous) 10g / liter and n-dodecyl trimethylamine chloride 1g / liter composition, heated to 60 ℃ degreasing bath, at 5A / dm 2 The current density, cathodic electrolytic degreasing for 1 minute.
[0058] After washing the copper foil with distilled water, use 47.5 parts by mass of dipropylene glycol monomethyl ether acetate, 47.5 parts by mass of propylene glycol dimethyl ether and 5 parts by mass of N-methyl-2-pyrrolidone as solvents, containing cyano The pigment ink of the dye is printed on the surface of the copper foil by inkjet printing, leaving such as figure 1 Graphics of the hexagonal shape shown. Thereafte...
example 2
[0061] After cleaning the electrolytic copper foil in the same manner as in Example 1, this copper foil was subjected to electrolytic plating in the same manner as in Example 1 to form a tin plating layer with a thickness of 5 μm. then press figure 2 In the pattern shown, 80% of the surface of the tin plating layer was covered with masking tape manufactured by Nitto Denko Co. ), dipped for 5 minutes, the tin coating of the uncovered part was peeled off, then after the same heat treatment and drying as in Example 1, it was cut into a circle with a diameter of 16 mm, as the negative electrode of the non-aqueous secondary battery. The area occupied by the active material layer of this electrode was 80% of the area of the current collector.
Embodiment 3
[0063] A positive photoresist is coated on the electrolytic copper foil, and electrolytic plating is performed on the exposed copper foil. Except this, all the other press embodiment 1 similarly, make the figure 1 The pattern of the active material layer shown is a negative electrode for a non-aqueous secondary battery. The area occupied by the active material layer of this electrode was 65% of the area of the current collector.
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Abstract
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