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Solid electrolyte composition and method for producing same, solid electrolyte-containing sheet, and methods for manufacturing all-solid secondary battery electrode sheet and all-solid secondary battery

A technology of solid electrolyte and secondary battery, applied in the direction of non-aqueous electrolyte battery electrodes, solid electrolyte, non-aqueous electrolyte battery, etc., can solve problems such as ignition, liquid leakage, battery short circuit, etc.

Active Publication Date: 2020-08-28
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 there is a possibility that a short circuit may occur inside the battery and be ignited due to overcharging or overdischarging, so further improvements in safety and reliability are required

Method used

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  • Solid electrolyte composition and method for producing same, solid electrolyte-containing sheet, and methods for manufacturing all-solid secondary battery electrode sheet and all-solid secondary battery
  • Solid electrolyte composition and method for producing same, solid electrolyte-containing sheet, and methods for manufacturing all-solid secondary battery electrode sheet and all-solid secondary battery
  • Solid electrolyte composition and method for producing same, solid electrolyte-containing sheet, and methods for manufacturing all-solid secondary battery electrode sheet and all-solid secondary battery

Examples

Experimental program
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Effect test

Embodiment

[0323] Hereinafter, the present invention will be described in further detail based on examples. In addition, the present invention is not limitedly interpreted by these. In the following examples, "parts" and "%" indicating the composition are based on mass unless otherwise specified. In addition, "-" used in a table|surface shows that the component in this column is not contained.

Synthetic example 1

[0324]

[0325] As a sulfide-based inorganic solid electrolyte, refer to T.Ohtomo, A.Hayashi, M.Tatsumisago, Y.Tsuchida, S.Hama, K.Kawamoto, Journal of Power Sources, 233, (2013), pp231-235 and A. Hayashi, S. Hama, H. Morimoto, M. Tatsumisago, T. Minami, Chem. Lett., (2001), non-patent literature of pp872-873, and synthesized Li-P-S type glasses.

[0326] Specifically, lithium sulfide (Li 2 S, manufactured by Aldrich.Inc, purity > 99.98%) 2.42g, phosphorus pentasulfide (P 2 S 5 , Aldrich.Inc product, purity>99%) 3.90 g was put into an agate mortar, and mixed for 5 minutes using an agate pestle. In addition, Li 2 S and P 2 S 5 The mixing ratio of Li is set in molar ratio 2 S:P 2 S 5 =75:25.

[0327] Into a 45 mL container made of zirconia (manufactured by Fritsch Co., Ltd.), 66 zirconia beads with a diameter of 5 mm and the total amount of the mixture of lithium sulfide and phosphorus pentasulfide were charged, and the container was sealed under an argon atmosphere. ...

Embodiment 1

[0329] A positive electrode composition as an electrode layer composition, a positive electrode sheet for an all-solid secondary battery, and an all-solid secondary battery were manufactured, and the battery capacity of the all-solid secondary battery was measured. In this example, the improvement effect of the battery capacity was confirmed in the form which used the solid electrolyte composition of this invention to produce a positive electrode active material layer.

[0330]

[0331] -Preparation of positive electrode compositions C-1 to C-19 and D-1 to D-6-

[0332] The preliminary dispersion step in the method for producing the solid electrolyte composition of the present invention is performed in a dry air environment (dew point -60° C.) as described below.

[0333] That is, 160 zirconia beads with a diameter of 5 mm were put into a 45 mL container made of zirconia (manufactured by Fritsch Co., Ltd.), and the sulfide-based inorganic solid electrolyte Li-P-S-based glass...

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Abstract

Provided are: a solid electrolyte composition containing an inorganic solid electrolyte and a dispersion medium (A), wherein the dispersion medium (A) includes a ketone compound (A1), and at least onedispersion medium (A2) selected from among a ketone compound (A2-1) having a chemical structure different from that of the ketone compound (A1), and an alcohol compound (A2-2); a method for producingsaid solid electrolyte composition; a solid electrolyte-containing sheet; and methods for manufacturing an all-solid secondary battery electrode sheet and an all-solid secondary battery.

Description

technical field [0001] The invention relates to a solid electrolyte composition and a manufacturing method thereof, a solid electrolyte-containing sheet, an electrode sheet for an all-solid secondary battery, and a manufacturing method of 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 there is a possibility of a short circuit inside the battery and being ignited due to overcharging or overdischarging, and further improvements in safety and reliability are required. [0003] Under such circumstances, all-sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01B1/06H01B13/00H01M4/13H01M4/62H01M10/0562
CPCH01M10/052H01M10/0565H01M2300/0082H01M10/056H01M2300/0065H01M4/131H01M4/1391H01M4/62H01M10/0562Y02E60/10Y02P70/50H01M4/13H01M4/139H01M10/0585H01B1/06H01M2300/0068
Inventor 矶岛广小泽信
Owner FUJIFILM CORP