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Solid composition and method for producing solid electrolyte

A solid composition and solid electrolyte technology, applied in solid electrolytes, electrolytes, non-aqueous electrolytes, etc., can solve problems such as volatilization, difficulty in obtaining composition, and difficulty in realizing solid electrolytes

Pending Publication Date: 2021-05-11
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if the above-mentioned high-temperature and / or long-time heat treatment is performed, Li will volatilize, and it is difficult to obtain a composition consistent with the design.
As a result, it is difficult to achieve the desired characteristics, especially the desired lithium ion conductivity, in the resulting solid electrolyte

Method used

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  • Solid composition and method for producing solid electrolyte
  • Solid composition and method for producing solid electrolyte
  • Solid composition and method for producing solid electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0362] First, a compound containing lanthanum nitrate hexahydrate as a source of lanthanum, tetrabutoxyzirconium as a source of zirconium, tributoxyantimony as a source of antimony, tantalum pentaethoxide as a source of tantalum, and A first solution of 2-n-butoxyethanol was prepared, and a second solution containing lithium nitrate as a lithium compound and 2-n-butoxyethanol as a solvent in a prescribed ratio was prepared.

[0363] Next, the first solution and the second solution were mixed at a predetermined ratio to obtain a mixed solution having the composition shown in Table 1.

[0364] Next, the first heat treatment was performed in the air at 140° C. for 20 minutes in a state where the liquid mixture obtained as described above was placed in a titanium beaker, whereby a gel-like mixture was obtained.

[0365] Next, the gel-like mixture obtained as described above was subjected to a second heat treatment at 540° C. for 20 minutes in the air to obtain a solid composition ...

Embodiment 2～12

[0368] In addition to changing the type and content of the raw materials used in the preparation of the first solution and the second solution, and adjusting the mixing ratio of the first solution and the second solution so that the composition of the mixed solution is as shown in Tables 1 to 3, A liquid mixture was prepared in the same manner as in Example 1, and a solid composition was produced in the same manner as in Example 1 except for using this liquid mixture.

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Abstract

The invention provides a solid composition and a method for producing a solid electrolyte. Through a low-temperature short-time thermal treatment, a solid electrolyte with expected characteristics can be formed stably. The solid composition according to the present disclosure is a solid composition for use in forming a solid electrolyte, is characterized by having a crystal phase, containing: at normal temperature and normal pressure, an oxide having a crystal phase different from the crystal phase of the solid electrolyte; a lithium compound; and an oxo acid compound. The oxo acid compound may contain at least one of a nitrate ion and a sulfate ion as an oxo anion.

Description

technical field [0001] The invention relates to a method for manufacturing a solid composition and a solid electrolyte. Background technique [0002] As a secondary battery using a solid electrolyte, for example, an all-solid lithium secondary battery equipped with a positive electrode, a negative electrode, and a solid electrolyte containing ceramics containing lithium, lanthanum, zirconium, and oxygen and having a garnet-type or garnet-like type crystal structure (for example, refer to Patent Document 1). [0003] Patent Document 1 discloses a method for producing a solid electrolyte material as follows: a raw material containing a Li component, a La component, and a Zr component is subjected to a heat treatment at a temperature exceeding 1125°C to less than 1230°C for 30 hours to 50 hours to obtain a solid electrolyte material containing Li , La, Zr and O and have a garnet-type or garnet-like crystal structure of ceramics. In addition, Patent Document 1 discloses the us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0562H01M10/0525H01M2300/0071H01M2300/0068C01G33/006C01G35/006C01P2006/40C01P2002/52C01P2002/30C01P2002/72C01P2002/60C01P2002/54C01P2006/80Y02E60/10
Inventor 横山知史豊田直之山本均
Owner SEIKO EPSON CORP