Positive electrode for electricity-storage device, manufacturing method therefor, positive-electrode active material for electricity-storage device, manufacturing method therefor, and electricity-storage device
A technology for positive active materials and power storage devices, which is applied in the direction of active material electrodes, electrode manufacturing, electrode collector coating, etc., and can solve the problems of not being able to contribute to the miniaturization of power storage devices, and being unable to form a rocking chair type secondary battery, etc. , to achieve the effect of increasing the energy density
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[0038] [Preparation of Conductive Polymer]
[0039] As known so far, conductive polyaniline can be obtained by electrolytically polymerizing aniline in the presence of a protic acid in a suitable solvent, or chemically oxidatively polymerizing it using an oxidizing agent. It can be obtained by oxidative polymerization of aniline with an oxidizing agent in the presence of a protonic acid. As the solvent, water is usually used, or a mixed solvent of a water-soluble organic solvent and water, or a mixed solvent of water and a nonpolar organic solvent may be used. In this case, a surfactant or the like may be used in combination.
[0040] The case where water is used as a solvent to oxidatively polymerize aniline will be described in more detail as an example. The chemical oxidative polymerization of aniline is carried out in water using a chemical oxidizing agent in the presence of a protic acid. The chemical oxidizing agent used may be either water-soluble or water-insoluble.
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Embodiment 1
[0107]
[0108] The polyaniline powder in the reduced and dedoped state obtained above was micronized by a wet jet milling micronization device (manufactured by SUGINO MACHINE LIMITED, StarBurst) to prepare a polyaniline powder with a median diameter of 1.2 μm. Next, after mixing 4 g of the polyaniline powder, 0.6 g of conductive carbon black (manufactured by Denka Kagaku Kogyo Co., Ltd., DENKA BLACK) powder, and 4 g of water, it was added to the above-mentioned binder solution (polyacrylic acid-polyacrylic acid lithium composite Body solution) 20.5g, stir well with a spatula. After ultrasonically treating it with an ultrasonic homogenizer for 5 minutes, it was slightly dispersed by applying a high shear force using FILMIX 40-40 type (manufactured by PRIMIX Corporation) to obtain a fluid paste. This paste was defoamed for 3 minutes using THINKY MIXER (manufactured by THINKY CORPORATION) to obtain a defoamed paste.
[0109]Next, using a desktop automatic coating device (manu...
Embodiment 2
[0113]
[0114] The polyaniline powder in the reduced and dedoped state obtained above was micronized with a wet jet milling micronizer (manufactured by SUGINO MACHINE LIMITED, StarBurst) to prepare a polyaniline powder with a median diameter of 2.7 μm. And except having used this polyaniline powder, it carried out similarly to Example 1, and produced the polyaniline sheet electrode (positive electrode).
[0115]
[0116] A lithium secondary battery was produced in the same manner as in Example 1 except that the polyaniline sheet electrode (positive electrode) produced above was used instead of the polyaniline sheet electrode (positive electrode) used in Example 1.
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