Solid electrolyte for a lithium-ion electrochemical cell
AssigneesSaft, Universite Paris-Est Creteil Val De Marne Upec, Centre National de la Recherche Scientifique (CNRS)
InventorsChristian JORDY, Pedro LOPEZ-ARANGUREN, Ha Anh DAO, Michel LATROCHE, Junxian ZHANG, Fermin CUEVAS
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Abstract
The invention relates to a compound of the formula Li7−xPS6−xXx−x(BH4)x in which x is selected from the group comprising Cl, Br, I, F and CN, 0≤x≤2, 0≤z≤0.50. This compound can be used as a solid electrolyte of a lithium-ion electrochemical element.
Claims15
A compound of formula Li7−xPS6−xXx−z(BH4)z wherein:
- X is selected from the group consisting of Cl, Br, I, F and CN
- 0<x≤2
- 0<z≤0.50.
A process for manufacturing a solid-electrolyte electrochemical cell, said process comprising the steps of:
- a) preparing a mixture containing a positive electrochemically active material;
- b) depositing on the mixture obtained in step a) a layer of the compound as claimed in claim l to form a solid electrolyte;
- c) application of at least one layer of a mixture containing a negative electrochemically active material on a free side of the compound layer forming the solid electrolyte.
A method comprising the step of substituting a boron-containing anion for a halide ion in a compound of formula Li7−xPS6−xXx
- where X is selected from the group consisting of Cl, Br, I, F and CN and 0<x≤2
- in order to increase the ionic conductivity of this compound.
Dependencies are inferred from the claim text.