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All-solid secondary battery, and method of manufacturing all-solid secondary battery

A secondary battery, all-solid technology, applied in secondary battery, electrolyte storage battery manufacturing, battery electrodes, etc., can solve problems such as fire and overheating

Pending Publication Date: 2021-09-03
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Commercial lithium-ion batteries include liquid electrolytes that include flammable organic solvents and therefore risk overheating and fire when a short circuit occurs

Method used

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  • All-solid secondary battery, and method of manufacturing all-solid secondary battery
  • All-solid secondary battery, and method of manufacturing all-solid secondary battery
  • All-solid secondary battery, and method of manufacturing all-solid secondary battery

Examples

Experimental program
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preparation example Construction

[0144] (Preparation of laminate of solid electrolyte layer / negative electrode layer)

[0145]At least one of materials constituting the first negative electrode active material layer 22, such as a first carbonaceous negative electrode active material, optionally a metal or metalloid negative electrode active material, and optionally a binder or an additive, may be added to the polar solvent Or a non-polar solvent to prepare slurry (the first negative electrode active material composition). The prepared slurry may be coated on the surface of the solid electrolyte layer 30 and dried to prepare a first laminate in which the first negative active material composition is disposed on the first surface of the solid electrolyte layer 30 . The first laminate may be heat-treated to prepare a second laminate in which the first negative electrode active material layer 22 which is a sintered product is provided on the solid electrolyte layer 30 . The heat treatment temperature may be, for...

Embodiment 1

[0163] Example 1: First layer (Ag+CB, 5 μm) / second layer (Ag+CB, 25 μm), and 450°C heat treatment of the first layer

[0164] (Preparation of laminate of solid electrolyte layer / negative electrode layer)

[0165]Carbon black (CB) having a primary particle diameter of about 38 nm and silver (Ag) particles having an average particle diameter of about 100 nm were prepared as negative electrode active materials.

[0166] 3 grams (g) of the carbon black (CB) and 1 g of the silver particles were placed in a container. 2.692 g of polyvinyl alcohol-polyacrylic acid (PVA-PAA) binder solution (SUMITOMO SEIKACHEMICALS CO., LTD; AG binder) was mixed with 7 g of distilled water, then added to the container, and the contents were distilled at about Stir at 1,000 rpm for about 30 minutes to prepare the first slurry. 4 g of zirconia balls and 20 g of distilled water were added to the first slurry, and stirred at about 1,000 revolutions per minute (rpm) for about 30 minutes (secondary stirri...

Embodiment 2

[0176] Example 2: First layer (Ag+CB, 5 μm) / second layer (Ag+CB, 25 μm), 600°C heat treatment of the first layer

[0177] An all-solid secondary battery was manufactured in the same manner as in Example 1 except that the heat treatment temperature was changed to 600° C. in the preparation of the first negative electrode active material layer.

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Abstract

The present invention relates to an all-solid secondary battery, and a method of manufacturing the all-solid secondary battery. The all-solid secondary battery includes: a cathode layer including a cathode active material layer; an anode layer; and a solid electrolyte layer including a solid electrolyte, wherein the solid electrolyte layer is disposed between the cathode layer and the anode layer, the anode layer includes an anode current collector, a first anode active material layer in contact with the solid electrolyte layer, and a second anode active material layer disposed between the anode current collector and the first anode active material layer, wherein the first anode active material layer includes a first carbonaceous anode active material, the second anode active material layer includes a second carbonaceous anode active material, and a first intensity ratio of an intensity of a D band peak to an intensity of a G band peak in a Raman spectrum of the first carbonaceous anode active material is less than a second intensity ratio of an intensity of a D band peak to an intensity of a G band peak in a Raman spectrum of the second carbonaceous anode active material.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to Korean Patent Application No. 10-2020-0019988 filed on February 18, 2020 and Korean Patent Application No. 10-2021-0011513 filed on January 27, 2021 at the Korean Intellectual Property Office and interests, and all interests arising therefrom, the contents of which are incorporated herein by reference in their entirety. technical field [0003] The present disclosure relates to an all-solid secondary battery and a method of manufacturing the same. Background technique [0004] Batteries having high energy density and high safety have been actively developed according to industrial demands. For example, lithium ion batteries are commercially available in the field of automobiles and in the fields of information-related equipment and communication equipment. In the automotive field, the safety of lithium-ion batteries is particularly important. [0005] Commercial lithium ion batter...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/058H01M10/0562
CPCH01M10/0525H01M10/058H01M10/0562Y02P70/50Y02E60/10H01M2004/027H01M4/587H01M4/134H01M4/133H01M10/052H01M4/366H01M4/382H01M2004/021H01M2300/0068H01M10/0585H01M4/364H01M2300/0071
Inventor 金柱植金世元V.罗夫李明镇S.柳林东民
Owner SAMSUNG ELECTRONICS CO LTD