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Electrolytic solution absorbing particles, self-supporting sheet, lithium-ion secondary battery electrode, separator, and lithium-ion secondary battery

A technology for absorbing particles and secondary batteries, which is applied in the direction of non-aqueous electrolyte battery electrodes, battery electrodes, secondary batteries, etc., can solve the problem of output characteristic decline, achieve suppressed calorific value, reduce initial resistance, long life and stable battery performance effect

Pending Publication Date: 2022-01-07
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in general, lithium-ion secondary batteries tend to have lower output characteristics due to repeated charging and discharging.

Method used

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  • Electrolytic solution absorbing particles, self-supporting sheet, lithium-ion secondary battery electrode, separator, and lithium-ion secondary battery
  • Electrolytic solution absorbing particles, self-supporting sheet, lithium-ion secondary battery electrode, separator, and lithium-ion secondary battery
  • Electrolytic solution absorbing particles, self-supporting sheet, lithium-ion secondary battery electrode, separator, and lithium-ion secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 7、 comparative example 1～ comparative example 2

[0189] [Final production]

[0190] The electrolytic solution absorbs the particles as shown in Table 2 and Table 3, as acetyleneblack, ab) as a conductive aid, as a PVDF of the binder, N-methyl-pyrrolidone as a solvent (N -methyl-n-pyrrolidinone, NMP) is mixed with a rotary converged mixer, thereby obtaining a premixed slurry. Then, the NCM 622 as the positive electrode active material is mixed with the premixed slurry, and the dispersion is used for dispersion using the planetary mixer, thereby obtaining a positive pole slurry using a planetary mixer. Further, in the case where the electrolytic solution is not added to absorb the particles, only the step is omitted.

[0191] The obtained positive slurry is applied to the single side of the thickness of 12 μm, and after drying at 120 ° C for 10 minutes, pressurized by pressurizing the roller pressure, thereby carried out in a vacuum of 120 ° C. Dry, thereby producing a positive electrode for lithium ion secondary batteries. In add...

Embodiment 8～ Embodiment 11、 comparative example 3

[0200] [Final production]

[0201] A copper-mixed mixer is wet-mixed using a PVDF as a conductive auxiliary agent, and N-methyl-N-pyrrolidone (NMP) as a solvent to be wet, thereby obtaining a premixed slurry. Then, the NCM 622 as the positive electrode active material is mixed with the obtained premixed slurry, and the dispersion treatment is performed using the planetary mixer, thereby obtaining a positive electrode slurry.

[0202] Example 8 to Example 11, the mass ratio of each component in the positive electrode slurry of Comparative Example 3 was set to NCM622: AB: PVDF = 94.0: 4.1: 1.9.

[0203] The obtained positive slurry is applied to the single side of the thickness of 12 μm, and after drying at 120 ° C for 10 minutes, pressurized by pressurizing the roller pressure, thereby carried out in a vacuum of 120 ° C. Dry, thereby producing a positive electrode for lithium ion secondary batteries. In addition, the positive electrode produced is used in a press-processed 30 mm × ...

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Abstract

Provided are electrolytic solution absorbing particles that have an electrolytic solution retention property and can increase a lithium ion transport characteristic, as well as a self-supporting sheet that includes the same, a lithium-ion secondary battery electrode that includes the same, a separator that uses the same, and a lithium-ion secondary battery that uses the same. These particles are particles wherein a resin layer that can absorb an electrolytic solution is provided on a surface of a highly dielectric oxide solid. Specifically, these particles are electrolytic solution absorbing particles that have the resin layer that can absorb the electrolytic solution on the surface of the highly dielectric oxide solid.

Description

Technical field [0001] The present invention relates to an electrolytic solution absorbent particles containing a self-supporting sheet containing the electrolyte absorbing particles, a lithium ion secondary battery of the electrolyte absorbing particles, using the electrolyte absorbing the diaphragm of particles, and use The electrolyte absorbed the lithium ion secondary battery of the particles. Background technique [0002] In the past, as a secondary battery having a high energy density, the lithium ion secondary battery was widely popular. A lithium ion secondary battery using liquid as an electrolyte has a structure in which a diaphragm is present between the positive electrode and the negative electrode, and a liquid electrolyte (electrolyte) is filled. [0003] The electrolyte of lithium-ion secondary batteries is usually flammable organic solvent, especially for heat, sometimes a problem. Therefore, a solid battery is also proposed which uses flame retardant solid electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M50/40H01M50/414H01M4/13H01M10/052H01M10/0566
CPCH01M4/13H01M10/052H01M10/0566H01M4/62Y02E60/10H01M2004/028H01M2004/027H01M4/0404H01M50/449H01M50/48H01M50/46H01M10/0525
Inventor 西面和希中川嵩士藤野健
Owner HONDA MOTOR CO LTD