Electrode sheet for all-solid secondary batteries, all-solid secondary battery, and production methods for electrode sheet for all-solid secondary batteries and all-solid secondary battery

A secondary battery and manufacturing method technology, applied in the direction of electrode manufacturing, battery electrodes, secondary batteries, etc., can solve problems such as liquid leakage, and achieve the effects of high discharge capacity density, peel strength and excellent flexibility of electrodes

Active Publication Date: 2020-05-22
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic electrolytes are prone to liquid leakage and, due to overcharging or overdischarging, may short-circuit inside the battery and be ignited, so further improvements in reliability and safety are required

Method used

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  • Electrode sheet for all-solid secondary batteries, all-solid secondary battery, and production methods for electrode sheet for all-solid secondary batteries and all-solid secondary battery
  • Electrode sheet for all-solid secondary batteries, all-solid secondary battery, and production methods for electrode sheet for all-solid secondary batteries and all-solid secondary battery
  • Electrode sheet for all-solid secondary batteries, all-solid secondary battery, and production methods for electrode sheet for all-solid secondary batteries and all-solid secondary battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0255] (Preparation of composition for primer layer formation)

[0256] The primer layer-forming composition is prepared by mixing the binder (A) and the conductive auxiliary agent in the presence of a solvent to slurry or make a solution.

[0257] Slurry can be performed by mixing a binder (A), a conductive additive, and a solvent using various mixers. It does not specifically limit as a mixing apparatus, For example, a ball mill, a bead mill, a planetary mixer, a paddle mixer, a roll mill, a kneader, and a disc mill are mentioned. The mixing conditions are not particularly limited. For example, when using a ball mill, mixing is preferably performed at 150 to 700 rpm (rotation per minute) for 1 to 24 hours. After mixing, it can be filtered if necessary.

[0258] The conductive auxiliary agent may be added and mixed simultaneously with the dispersion process of the binder (A), or may be added and mixed independently. In addition, when preparing a composition for forming a p...

Embodiment

[0310] Hereinafter, the present invention will be described in further detail based on examples. In addition, the present invention is not limited thereto and interpreted. In the following examples, "parts" and "%" showing the composition are based on mass unless otherwise specified. Also, "room temperature" means 25°C.

[0311]

[0312] (Synthesis of Poly(methyl methacrylate-co-butyl acrylate))

[0313]In a 1000 mL three-necked flask equipped with a reflux cooler and a gas introduction plug, 24.0 g of methyl methacrylate (manufactured by Wako Pure Chemical Industries, Ltd.), 96.0 g of butyl acrylate (manufactured by Wako Pure Chemical Industries, Ltd.) and 480.0 g of toluene, after carrying out 2 nitrogen replacements, as an initiator, add 2.4 g of V-65 (trade name) manufactured by Wako Pure Chemical Industries, Ltd., further after carrying out 2 nitrogen replacements, under nitrogen flow and in It was heated at 70°C for 3 hours. Heating was continued until the disappea...

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PUM

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Abstract

Provided is an electrode sheet for all-solid secondary batteries which has a collector, a primer layer, and an electrode active material layer provided in that order. In the electrode sheet for all-solid secondary batteries, the primer layer includes a binder (A). The electrode active material layer includes an inorganic solid electrolyte (B), an active material (C), and binder particles (D) having an average particle size in the range of 1 nm to 10 [mu]m. The electrode active material layer also includes the binder (A) on at least the side of the interface adhered to the primer layer. A crosslinked structure is not formed between the binder (A) and the inorganic solid electrolyte (B). Also provided are: an all-solid secondary battery provided with the electrode sheet for all-solid secondary batteries; and production methods for the electrode sheet for all-solid secondary batteries and the all-solid secondary battery.

Description

technical field [0001] The invention relates to an electrode sheet for an all-solid secondary battery, an all-solid secondary battery, and a method for manufacturing the electrode sheet for the all-solid secondary battery and the all-solid secondary battery. Background technique [0002] A lithium-ion secondary battery is a storage battery that has a negative electrode, a positive electrode, and an electrolyte sandwiched between the negative electrode and the positive electrode, and can reciprocate lithium ions between the two electrodes for charging and discharging. Conventionally, in lithium ion secondary batteries, an organic electrolytic solution is used as an electrolyte. However, organic electrolytes are prone to liquid leakage and may be ignited due to short-circuiting inside the battery due to overcharging or overdischarging, and further improvements in reliability and safety are required. [0003] Under such circumstances, an all-solid-state secondary battery using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/62H01M10/0562H01M4/139
CPCH01M4/13H01M4/139H01M4/62H01M10/0562H01M2300/0068H01M4/622H01M10/052Y02E60/10Y02P70/50H01M4/0404H01M4/36H01M4/621H01M10/0585
Inventor 望月宏显牧野雅臣三村智则
Owner FUJIFILM CORP
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