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Composition for electricity storage device, slurry for electricity storage device electrode, electricity storage device electrode, and electricity storage device
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A technology of a power storage device and a composition, which is applied to non-aqueous electrolyte battery electrodes, battery electrodes, active material electrodes, etc., can solve problems such as low output voltage, and achieve the effects of excellent adhesion and good charge-discharge durability characteristics.
Pending Publication Date: 2022-03-18
株式会社引能仕材料
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[0009] However, the olivine-type lithium-containing phosphate compound has a low output voltage because the occlusion and release voltage of Li ions is around 3.4V.
Method used
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Embodiment 1
[0304] 5.3.1. Preparation and evaluation of compositions for electrical storage devices
[0305] (1) Preparation of composition for electrical storage device
[0306] The polymer dispersion containing polymer (A1) obtained above and the polymer-containing solution containing polymer (B1) are just added to 10 mass parts of polymer (A1) and 90 mass parts of polymer (B1) respectively. amount, and stirred at 60 rpm for 1 hour, thereby obtaining the composition for an electrical storage device used in Example 1.
[0307] (2) pH measurement
[0308] As a result of measuring the pH at 25° C. of the composition for an electrical storage device obtained above using a pH meter (manufactured by Horiba Seisakusho Co., Ltd.), it was confirmed that the pH was 9.0.
[0309] (3) Viscosity measurement
[0310] The viscosity at a temperature of 25° C. was measured in accordance with JIS Z 8803 for the composition for an electrical storage device obtained above. In addition, as a viscometer,...
Embodiment 10
[0354] In the same manner as in Example 7, the polymer dispersion (A7) and the polymer-containing solution (B7) were just added in an amount corresponding to 25 parts by mass of the polymer (A7) and 75 parts by mass of the polymer (B7), and stirred at 60 rpm 1 hour, thereby obtaining the composition for electrical storage devices used in Example 10. Next, 1 part by mass of a thickener (trade name "CMC2200", manufactured by Daicel Co., Ltd.) was put into a twin-shaft planetary mixer (manufactured by PRIMIX Co., Ltd., trade name "TKHIVIS MIX 2P-03") as a component to be added first ( Solid content conversion value, added with an aqueous solution with a concentration of 2% by mass), 3 parts by mass of the above-mentioned composition for an electrical storage device (solid content conversion value), artificial graphite belonging to highly crystalline graphite as a negative electrode active material (Hitachi Chemical Industry Co., Ltd. Co., Ltd., trade name "MAG") 76 parts by mass ...
Embodiment 11
[0357] In the slurry for electrical storage device electrodes obtained in Example 10 above, except that the thickener was 3 parts by mass, an electrical storage device electrode and an electrical storage device were produced in the same manner as in Example 10 above. 1 was evaluated in the same manner.
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Abstract
Provided is a composition for a power storage device, said composition being capable of producing a power storage device electrode having excellent adhesion and good charge / discharge durability characteristics. This composition for an electricity storage device contains polymer particles (A), a polymer (B), and a liquid medium (C), and the polymer particles (A) contain 20-65 parts by mass of a repeating unit (a1) derived from a conjugated diene compound and 1-40 parts by mass of a repeating unit (a2) derived from an alpha, beta-unsaturated nitrile compound when the total of the repeating units contained in the polymer particles (A) is taken as 100 parts by mass. The polymer (B) contains 5-95 parts by mass of a repeating unit (b1) derived from an unsaturated carboxylic acid and 5-95 parts by mass of a repeating unit (b2) derived from a (meth) acrylamide when the total of the repeating units contained in the polymer (B) is taken as 100 parts by mass.
Description
technical field [0001] The present invention relates to a composition for an electrical storage device, a slurry for an electrical storage device electrode containing the composition and an active material, an electrical storage device electrode formed by applying the slurry to a current collector and drying it, and an electrical storage device electrode comprising the composition and an active material. electrode storage device. Background technique [0002] In recent years, power storage devices having high voltage and high energy density are required as power sources for driving electronic devices. As such power storage devices, lithium ion batteries, lithium ion capacitors, and the like are expected. [0003] An electrode used in such an electrical storage device is generally produced by applying a composition (slurry for electrode) containing an active material and a polymer functioning as a binder on the surface of a current collector and drying it. The properties re...
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