Sulphide based lithium-ion conducting solid materials and methods for the production thereof
AssigneeUmicore AG & Co. KG
InventorsAntoine BREHAULT, Pol BRIANTAIS, Yann GUIMOND, Alexander Teklit TESFAYE
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Abstract
The present invention relates to solid materials which are obtainable by melt-quenching mixtures of lithium sulphide, boron sulphide, boron oxide and Se, Te, In or a combination thereof, thereby forming a glassy solid which is suitable for use in electrochemical cells, for example as lithium-ion and electronically conducting coating and exhibits a large thermal stability.
Claims16
A solid material having a composition according to the general formula (I)
- Wherein X represents Se, Te, In or combinations thereof;
- a is within the range of 0.04 to 0.12;
- b is within the range of 0 to 0.04;
- c is within the range of 0.12 to 0.26;
- d is within the range of 0.001 to 0.17.
The solid material according to any one of the previous claims wherein
- a is within the range of 0.04 to 0.12;
- b is within the range of 0 to 0.04;
- c is within the range of 0.12 to 0.21;
- d is within the range of 0.001 to 0.17.
The solid material according to any one of the previous claims wherein
- a is within the range of 0.06 to 0.11;
- b is within the range of 0 to 0.04;
- c is within the range of 0.13 to 0.19;
- d is within the range of 0.002 to 0.07, preferably within the range of 0.002 to 0.03.
The solid material according to any one of the previous claims wherein
- a is within the range of 0.06 to 0.10;
- b is within the range of 0.002 to 0.02, preferably within the range of 0.005 to 0.02;
- c is within the range of to 0.13 to 0.19;
- d is within the range of 0.002 to 0.07, preferably within the range of 0.002 to 0.03.
The solid material according to any one of the previous claims wherein d is within the range of 0.002 to 0.06, preferably within the range of 0.002 to 0.03, more preferably within the range of 0.01 to 0.03.
The solid material according to any one of the previous claims wherein X is Se and d is within the range of 0.008 to 0.01, preferably within the range of 0.01 to 0.03.
The solid material according to any one of the previous claims wherein 5a+5b+3c+d=1.
A solid material, preferably the solid material according to any one of the previous claims, which is obtainable by melt-quenching a mixture of A and B, wherein the molar ratio of A and B in the mixture before quenching is within the range of 60:40 to 99.5:0.5;
- Wherein component A is according to the general formula (II)
- wherein
- x is within the range of 55 to 85, preferably within the range of 55 to 75, more preferably within the range of 60 to 70;
- y is within the range of 15 to 45, preferably within the range of 20 to 40, more preferably within the range of 25 to 35;
- z is within the range of 0 to 15, preferably within the range of 0 to 10, more preferably within the range of 0 to 6, even more preferably within the range of 0 to 5;
- x
- +
- y
- +
- z
- =
- 100
- ;
- and
- wherein component B is selected from Se, Te, In or combinations thereof.
The solid material according to any one of the previous claims wherein the material is a glassy solid.
The solid material according to any one of the previous claims wherein the material has an ionic conductivity at 25° C. of at least 0.1 mS/cm, preferably at least 0.25 mS/cm and a thermal stability of more than 110° C.
Dependencies are inferred from the claim text.