ELECTRODE MIXTURE AND ELECTRODE SLURRY AND BATTERY WHICH USE SAID ELECTRODE MIXTURE
An electrode mixture contains an active material containing a lithium (Li) element, a manganese (Mn) element, and an oxygen (O) element and a sulfur compound containing a lithium (Li) element, a phosphorus (P) element, a sulfur(S) element, and a halogen (X) element, wherein the sulfur compound has a mole ratio of the halogen (X) element to the phosphorus (P) element of less than 1. Preferably, the active material includes a core portion containing a lithium (Li) element, a manganese (Mn) element, and an oxygen (O) element and a coating portion located on the surface of the core portion. Preferably, the coating portion contains a lithium (Li) element, an element A, and an oxygen (O) element, where A is at least one element selected from titanium (Ti), zirconium (Zr), tantalum (Ta), niobium (Nb), and aluminum (Al).
1 . An electrode mixture comprising:
an active material containing a lithium (Li) element, a manganese (Mn) element, and an oxygen (O) element; and
a sulfur compound containing a lithium (Li) element, a phosphorus (P) element, a sulfur(S) element, and a halogen (X) element,
wherein the sulfur compound has a mole ratio of the halogen (X) element to the phosphorus (P) element of less than 1.
2 . The electrode mixture according to claim 1 , wherein the active material has a working potential of at least 4.5 V against a metallic Li reference potential.
3 . The electrode mixture according to claim 1 ,
wherein the active material includes
a core portion containing a lithium (Li) element, a manganese (Mn) element, and an oxygen (O) element and
a coating portion located on a surface of the core portion, and
the coating portion contains a lithium (Li) element, an element A, and an oxygen (O) element, where A is at least one element selected from titanium (Ti), zirconium (Zr), tantalum (Ta), niobium (Nb), and aluminum (AI).
4 . The electrode mixture according to claim 1 , wherein the halogen (X) element contained in the sulfur compound is at least one element selected from a chlorine (CI) element and a bromine (Br) element.
5 . The electrode mixture according to claim 1 , wherein the sulfur compound has a mole ratio of the lithium (Li) element to the phosphorus (P) element of 4 or greater.
6 . The electrode mixture according to claim 1 , wherein the sulfur compound contains a crystalline phase having an argyrodite-type crystal structure.
7 . An electrode slurry comprising an electrode mixture and a solvent,
wherein the electrode mixture contains
an active material containing a lithium (Li) element, a manganese (Mn) element, and an oxygen (O) element and
a sulfur compound containing a lithium (Li) element, a phosphorus (P) element, a sulfur(S) element, and a halogen (X) element, and
the sulfur compound has a mole ratio of the halogen (X) element to the phosphorus (P) element of less than 1.
8 . A battery comprising
a positive electrode layer,
a negative electrode layer, and
a solid electrolyte layer containing a solid electrolyte and being disposed between the positive electrode layer and the negative electrode layer,
wherein the positive electrode layer contains
an active material containing a lithium (Li) element, a manganese (Mn) element, and an oxygen (O) element and
a sulfur compound containing a lithium (Li) element, a phosphorus (P) element, a sulfur(S) element, and a halogen (X) element, and
the sulfur compound has a mole ratio of the halogen (X) element to the phosphorus (P) element of less than 1.
9 . The battery according to claim 8 , wherein the solid electrolyte and the sulfur compound contained in the positive electrode layer are different from each other.