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Solid electrolyte, method for producing solid electrolyte, and composite

A technology for solid electrolytes and manufacturing methods, applied in solid electrolytes, non-aqueous electrolyte batteries, electrolyte immobilization/gelation, etc., capable of solving problems such as low solid electrolytes

Active Publication Date: 2022-03-01
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, a solid electrolyte capable of obtaining a molded body of a solid electrolyte with a sufficiently low grain boundary resistance at a sufficiently low firing temperature has not yet been obtained.

Method used

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  • Solid electrolyte, method for producing solid electrolyte, and composite
  • Solid electrolyte, method for producing solid electrolyte, and composite
  • Solid electrolyte, method for producing solid electrolyte, and composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0391] In this example, the following fabrication is used to fabricate compositions such as Li 6.3 La 3 (Zr 1.25 In 0.05 Sb 0.50 Ta 0.20 )O 12 The pre-fired body of the solid electrolyte shown.

[0392] First, 7.560 g of the 2-n-butoxyethanol solution of lithium nitrate prepared as above, 3.000 g of the 2-n-butoxyethanol solution of lanthanum nitrate hexahydrate, 0.050 g of indium nitrate aqueous solution, and 2 mL of 2-n-butoxyethanol as an organic solvent. Fill it with a magnetic stirrer and place on a hot plate with a magnetic stirrer function.

[0393] The installed temperature of the hot plate was set to 160° C., the rotation speed was set to 500 rpm, and heating and stirring were performed for 30 minutes.

[0394] Next, 2 mL of 2-n-butoxyethanol was added, followed by heating and stirring for 30 minutes.

[0395] Then, 2 mL of 2-n-butoxyethanol was further added, followed by heating and stirring for 30 minutes.

[0396] If the heating and stirring for 30 minute...

Embodiment 2

[0405] In this example, the following fabrication is used to fabricate compositions such as Li 6.3 La 3 (Zr 1.15 In 0.15 Sb 0.50 Ta 0.20 )O 12 The pre-fired body of the solid electrolyte shown.

[0406] First, 7.560 g of the 2-n-butoxyethanol solution of lithium nitrate prepared as above, 3.000 g of the 2-n-butoxyethanol solution of lanthanum nitrate hexahydrate, 0.150 g of indium nitrate aqueous solution and 2 mL of 2-n-butoxyethanol as an organic solvent. Fill it with a magnetic stirrer and place on a hot plate with a magnetic stirrer function.

[0407] The installed temperature of the hot plate was set to 160° C., the rotation speed was set to 500 rpm, and heating and stirring were performed for 30 minutes.

[0408] Next, 2 mL of 2-n-butoxyethanol was added, followed by heating and stirring for 30 minutes.

[0409] Then, 2 mL of 2-n-butoxyethanol was further added, followed by heating and stirring for 30 minutes.

[0410] If the heating and stirring for 30 minutes...

Embodiment 3

[0419] In this example, the following fabrication is used to fabricate compositions such as Li 5.85 La 3 (Zr 0.70 In 0.15 Nb 0.25 Sb 0.50 Ta 0.40 )O 12 The pre-fired body of the solid electrolyte shown.

[0420] First, 7.020 g of the 2-n-butoxyethanol solution of lithium nitrate prepared as above, 3.000 g of the 2-n-butoxyethanol solution of lanthanum nitrate hexahydrate, 0.150 g of indium nitrate aqueous solution and 2 mL of 2-n-butoxyethanol as an organic solvent. Fill it with a magnetic stirrer and place on a hot plate with a magnetic stirrer function.

[0421] The installed temperature of the hot plate was set to 160° C., the rotation speed was set to 500 rpm, and heating and stirring were performed for 30 minutes.

[0422] Next, 2 mL of 2-n-butoxyethanol was added, followed by heating and stirring for 30 minutes.

[0423] Then, 2 mL of 2-n-butoxyethanol was further added, followed by heating and stirring for 30 minutes.

[0424] If the heating and stirring for ...

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Abstract

The invention provides a solid electrolyte, a method for producing the solid electrolyte, and a composite. Namely, the solid electrolyte has excellent lithium ion conductivity in the main body, and can obtain a molded body of a solid electrolyte having sufficiently low grain boundary resistance at a sufficiently low firing temperature; a method for producing a solid electrolyte, whereby a molded body of a solid electrolyte having a sufficiently low grain boundary resistance can be obtained at a sufficiently low firing temperature, while having excellent lithium ion conductivity of the main body; and a composite in which the grain boundary resistance between the active material and the solid electrolyte is sufficiently low. A solid electrolyte according to the present invention is characterized by being represented by composition formula (1). Li < 7-x-y > La < 3 > (Zr < 2-x-y > In < x > M < y >) O < 12 > (1). In the formula (1), x and y satisfy 0.00 lt; xlt; 0.20, 0.20 < = y < lt >; 1.50, and M is two or more elements selected from the group consisting of Nb, Ta, and Sb.

Description

technical field [0001] The invention relates to a solid electrolyte, a manufacturing method of the solid electrolyte and a composite body. Background technique [0002] Lithium batteries (including primary batteries and secondary batteries) are used as power sources for many electric devices including portable information devices. Among them, an all-solid-state lithium battery using a solid electrolyte for lithium conduction between positive and negative electrodes has been proposed as a lithium battery that achieves both high energy density and safety (for example, see Patent Document 1). [0003] Solid electrolytes can conduct lithium ions without using an organic electrolyte, and since there is no leakage of the electrolyte or volatilization of the electrolyte due to drive heat, it has attracted attention as a relatively safe material. [0004] As a solid electrolyte used in such an all-solid lithium battery, an oxide-based solid electrolyte having high lithium ion condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525C04B35/48C04B35/622
CPCH01M10/0562H01M10/0525C04B35/48C04B35/622H01M2300/0085H01M2300/0068C04B2235/3203C04B2235/3227C04B2235/3286C04B2235/3294C04B2235/3251C04B2235/661H01M4/62H01M4/525H01M4/366H01M10/052H01M4/131Y02E60/10H01M2300/0091
Inventor 山本均寺冈努横山知史
Owner SEIKO EPSON CORP