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Solid state electrolyte and solid state battery

A solid-state electrolyte and solid-state battery technology, which is applied in the direction of batteries with solid electrolytes, non-aqueous electrolyte batteries, non-aqueous electrolyte batteries, etc., can solve the practical requirements that cannot be met, the lithium ion migration rate cannot be improved, and the conductivity of solid electrolytes is low. and other problems, to achieve the effect of improving electrical performance, good chemical stability, and solving poor conductivity

Inactive Publication Date: 2019-08-06
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the restriction of grain boundaries in solid electrolytes, the lithium ion migration rate in solid electrolytes cannot be increased, resulting in low conductivity of solid electrolytes that cannot meet practical requirements.

Method used

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  • Solid state electrolyte and solid state battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Lithium hydroxide (LiOH), lanthanum oxide (La 2 o 3 ), zirconia (ZrO 2 ) and tantalum oxide (Ta 2 o 5 ) mixed with lithium sulfide (LiS) (the above raw materials are formulated with reference to the ratio of x=0.1 and y=0.65 in formula 1), 500 grams of isopropanol (IPA) was added, and ground for 24 hours by ball milling, and the above materials were uniformly mixed Then the precursor slurry can be obtained. Next, the precursor slurry is dried to obtain dry precursor powder. Then, the dried precursor powder was put into an alumina crucible, and sintered in a nitrogen atmosphere at a temperature of 950 °C for 6 hours, and the obtained powder was a sulfur-doped lithium lanthanum zirconium tantalum oxide (LLZTO) solid electrolyte powder ( Sulfur content is 5.73 mole percent).

Embodiment 2

[0054] Prepare the sulfur-doped lithium lanthanum zirconium tantalum oxide (LLZTO) solid electrolyte powder of Example 2 according to a preparation procedure similar to that of Example 1, the difference is that in Example 2, each raw material is x= 0.1, y = 1.2 ratio preparation. Therefore, the powder obtained after sintering is sulfur-doped lithium lanthanum zirconium tantalum oxide (LLZTO) solid electrolyte powder (sulfur content is 11.11 mole percent).

Embodiment 3

[0056] Prepare the sulfur-doped lithium lanthanum zirconium tantalum oxide (LLZTO) solid electrolyte powder of Example 3 according to a preparation procedure similar to that of Example 1, the difference is that in Example 3, each raw material is x= 0.1, y=3 ratio preparation. Therefore, the powder obtained after sintering is sulfur-doped lithium lanthanum zirconium tantalum oxide (LLZTO) solid electrolyte powder (sulfur content is 33.33 mole percent).

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Abstract

A solid state electrolyte having a garnet type crystal structure is provided. The chemical composition of the solid state electrolyte includes lithium, lanthanum, zirconium, oxygen, and sulfur. The content of sulfur in the solid state electrolyte is between 5 mol % and 35 mol % based on the content of oxygen in the solid state electrolyte. A solid state battery including a positive electrode layer, a negative electrode layer, and a solid state electrolyte layer is also provided. The solid state electrolyte layer is disposed between the positive electrode layer and the negative electrode layer.The solid state electrolyte layer includes the solid state electrolyte.

Description

technical field [0001] The invention relates to an electrolyte and a battery, in particular to a solid electrolyte and a solid battery. Background technique [0002] At present, commercial lithium batteries still mainly use liquid electrolytes, and because this type of batteries has some safety problems, if solid electrolytes can be used instead of traditional liquid electrolytes, it will not only improve the safety of batteries , the design of the battery structure is also more flexible, and at the same time, the energy density of the battery can also be effectively improved to meet the market demand for lithium battery energy density. However, due to the restriction of grain boundaries in solid electrolytes, the migration rate of lithium ions in solid electrolytes cannot be increased, resulting in low conductivity of solid electrolytes that cannot meet practical requirements. Therefore, how to improve the conductivity of the solid electrolyte is actually the focus of rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M10/0562H01M6/18
CPCH01M10/0562H01M10/052H01M6/185H01M2300/0071H01M2300/0091H01M4/62H01M4/623H01M4/13Y02E60/10Y02P70/50H01M10/0585H01M2300/0082
Inventor 刘佳儿廖世杰游淑君陈金铭
Owner IND TECH RES INST
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