Method of producing sulfide solid electrolyte and method for producing electrode mixture
AssigneeIdemitsu Kosan Co., Ltd.
InventorsKatsuhito Kondo, Atsushi Sato
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Abstract
A method of producing a sulfide solid electrolyte and a method of producing an electrode mixture are described. The method of producing the sulfide solid electrolyte includes a step of mixing a raw material inclusion containing a lithium atom, a phosphorous atom, a sulfur atom, and a halogen atom with at least one lithium oxoacid salt of lithium nitrate, lithium nitrite, lithium silicate, lithium borate, and lithium carbonate. The sulfide solid electrolyte has high ion conductivity and excellent reactivity with an electrode active material, especially a positive electrode active material.
Claims13
A method of producing a sulfide solid electrolyte having a stable crystalline phase, the method comprising:
- mixing a raw material inclusion containing a lithium atom, a phosphorous atom, a sulfur atom, and a halogen atom with lithium carbonate and optionally at least one lithium oxoacid salt selected from the group consisting of lithium nitrate, lithium nitrite, lithium silicate, and lithium borate, thereby obtaining a mixture,
- wherein a number of moles of lithium carbonate and the optional at least one lithium oxoacid salt is 1.0 mol parts or more and 10.0 mol parts or less with respect to 100 mol parts of lithium atoms contained in the raw material inclusion, and
- the sulfide solid electrolyte contains Li3PO4 crystal structure in an amount of 1.0 mol % or more and 5.0 mol % or less, relative to total crystals contained in the sulfide solid electrolyte.
A method of producing an electrode mixture, the method comprising:
- obtaining a sulfide solid electrolyte having a stable crystalline phase from a mixture, which is obtained by mixing a raw material inclusion containing a lithium atom, a phosphorous atom, a sulfur atom, and a halogen atom with lithium carbonate and optionally at least one lithium oxoacid salt selected from the group consisting of lithium nitrate, lithium nitrite, lithium silicate, and lithium borate;
- and
- mixing the sulfide solid electrolyte and an electrode active material,
- wherein a number of moles of lithium carbonate and the optional at least one lithium oxoacid salt is 1.0 mol parts or more and 10.0 mol parts or less with respect to 100 mol parts of lithium atoms contained in the raw material inclusion, and
- the sulfide solid electrolyte contains Li3PO4 crystal structure in an amount of 1.0 mol % or more and 5.0 mol % or less, relative to total crystals contained in the sulfide solid electrolyte.
Dependencies are inferred from the claim text.