Lithium ion conductor and all solid state battery comprising the same
AssigneesSamsung Electro-Mechanics Co., Ltd., Bass, Inc.
InventorsKyongbok Min, Han Kim, Jongmin Kim, Kil Ho Kim, Daehyun Kim, Taeho Park, Shiwoo Lee, Duckhyun Chang, Emmanuel Kwame Ampadu, Poo Reum Choi
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Abstract
The lithium ion conductor for an all-solid-state battery according to the present disclosure is represented by Chemical Formula 1. In Chemical Formula 1, 4.2≤x≤6.0, 0.15≤y≤0.45, and z≥1.1, and X is F, Cl, Br, or I.
Claims27
A lithium ion conductor being represented by Chemical Formula 1:
- Lix(B1-yAly)7O12X2 [Chemical Formula 1]
- wherein, in Chemical Formula 1,
- 4.2≤x≤6.0, 0.15≤y≤0.45, and z≥1.1, and
- X is F, Cl, Br, or I.
A method of preparing a lithium ion conductor, comprising melting and cooling a precursor mixture including lithium (Li) oxide, boron (B) oxide, aluminum (Al) oxide, and lithium halide (Li—X);
- and heat-treating the precursor mixture, to prepare lithium ion conductor represented by Chemical Formula 1:
- Lix(B1 yAly)7O12X2 [Chemical Formula 1]
- wherein, in Chemical Formula 1,
- 4.2≤x≤6.0, 0.15≤y≤0.45, and z≥1.1, and
- X is F, Cl, Br, or I.
An all-solid-state battery, comprising
- a solid electrolyte layer and a positive electrode layer and a negative electrode layer disposed with the solid electrolyte layer therebetween, wherein any one selected from the solid electrolyte layer, the positive electrode layer, the negative electrode layer,
- and a combination thereof includes a lithium ion conductor, and the lithium ion conductor is represented by Chemical Formula 1:
- Lix(B1-yAly)7O12X2 [Chemical Formula 1]
- wherein, in Chemical Formula 1,
- 4.2≤x≤6.0, 0.15≤y≤0.45, and z≥1.1, and
- X is F, Cl, Br, or I.
A method of manufacturing an all-solid-state battery, comprising:
- preparing a solid electrolyte layer green sheet including a fused and cooled precursor mixture;
- preparing a positive electrode layer green sheet including a positive electrode active material and a lithium ion conductor;
- preparing a negative electrode layer green sheet including a negative electrode active material and the lithium ion conductor;
- stacking the positive electrode layer green sheet, the solid electrolyte layer green sheet and the negative electrode green sheet;
- and
- firing the stack with a hot press under pressure,
- wherein the precursor mixture comprises Li2O, B2O3, Al2O3 and LiX, X being selected from the group consisting of F, Cl, Br and I, and
- wherein the lithium ion conductor is represented by Chemical Formula 1:
- Lix(B1-yAly)7O12X2 [Chemical Formula 1]
- wherein, in Chemical Formula 1,
- 4.2≤x≤6.0, 0.15≤y≤0.45, and z≥1.1, and
- X is F, Cl, Br, or I.
Dependencies are inferred from the claim text.