# US 2026/0100362 A1 · Positive electrode active material for non-aqueous electrolyte secondary battery, method for producing positive electrode active material for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

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- Number: US 2026/0100362 A1
- Document ID: US20260100362A1
- Status: Published application
- Kind: A1
- Application number: 19/114,247
- Filed: 2023-09-12
- Published: 2026-04-09
- Earliest claimed: 2022-09-30
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Shogo ESAKI; Mitsuhiro HIBINO; Kensuke NAKURA
- Web page: https://patentgrep.com/patent/US20260100362A1

## CPC

- C01G 53/50: of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
- H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
- C01G 53/44: containing manganese
- H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- H01M 10/052: Li-accumulators
- C01P 2002/52: containing elements as dopants
- C01P 2002/54: one element only
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/74: by peak-intensities or a ratio thereof only
- C01P 2004/03: obtained by SEM
- C01P 2004/45: Aggregated particles or particles with an intergrown morphology
- C01P 2004/51: Particles with a specific particle size distribution
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2006/12: Surface area
- C01P 2006/40: Electric properties
- Y02E 60/10: Energy storage using batteries
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A positive electrode active material for a non-aqueous electrolyte secondary battery according to one embodiment comprises a lithium transition metal composite oxide represented by the compositional formula LiαNaβNi1-b-cMnbXcOd (where X is at least one element selected from metallic elements other than Li, Na, Ni, and Mn, 0.80≤α≤1.20, 0≤β≤0.05, 0.80≤α+β≤1.20, 0.25<b≤0.65, 0≤c≤0.1, 0.4≤1−b−c<0.75, and d is a value satisfying the valence), and the ratio I108/I110 of the integrated intensity I108 of the diffraction peak at the (108) plane to the integrated intensity I110 of the diffraction peak at the (110) plane of the x-ray diffraction pattern obtained by powder x-ray diffraction of the lithium transition metal composite oxide is I108/I110<0.4.

## Claims

### Claim 1

A positive electrode active material for a non-aqueous electrolyte secondary battery, including a lithium-transition metal composite oxide represented by a compositional formula LiαNaβNi1-b-cMnbXcOd, wherein X represents at least one element selected from the group consisting of metal elements other than Li, Na, Ni, and Mn, 0.80≤α≤1.20, 0≤β≤0.05, 0.80≤α+β≤1.20, 0.25<b≤0.65, 0≤c≤0.1, 0.4≤1−b−c<0.75, and “d” represents a value satisfying an atomic valency, wherein
a ratio I108/I110 satisfies I108/I110<0.4, the ratio being an integrated intensity I108 of a diffraction peak on a (108) plane relative to an integrated intensity I110 of a diffraction peak on a (110) plane of an X-ray diffraction pattern obtained by powder X-ray diffraction of the lithium-transition metal composite oxide.

### Claim 2 (depends on 1)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1, wherein, in the compositional formula LiαNaαNi1-b-cMnbXcOd, X represents at least one element selected from the group consisting of Mg, Ca, Sr, Ba, Sn, Ti, Si, V, Cr, Fe, Cu, Zn, Bi, Sb, B, Ga, In, P, Zr, Hf, Nb, Ta, Mo, W, Co, and Al.

### Claim 3 (depends on 1)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1, wherein, in the compositional formula LiαNaβNi1-b-cMnbXcOd, X represents Al, Co, Zr, or P.

### Claim 4 (depends on 1)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1, wherein a ratio I003/I104 satisfies I003/I104>1.0, the ratio being an integrated intensity I003 of a diffraction peak on a (003) plane relative to an integrated intensity I104 of a diffraction peak on a (104) plane of the X-ray diffraction pattern.

### Claim 5 (depends on 1)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1, wherein half-value widths of the diffraction peaks on the (108) plane and the (110) plane of the X-ray diffraction pattern are greater than or equal to 0.2° and less than or equal to 0.8°.

### Claim 6 (depends on 1)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 1, wherein, in the compositional formula LiαNaβNi1-b-cMnbXcOd, a mole ratio (β) of Na satisfies 0≤β≤0.035.

### Claim 7

A method for manufacturing a positive electrode active material for a non-aqueous electrolyte secondary battery, the method including:
a step of synthesizing a sodium composite oxide represented by a compositional formula NaγNi1-b-cMnbXcOd, wherein X represents at least one element selected from the group consisting of metal elements other than Li, Na, Ni, and Mn, 0.80≤γ≤1.20, 0.25<b≤0.65, 0≤c≤00.1, 0.4≤1−b−c<0.75, and “d” represents a value satisfying an atomic valency; and
a step of reacting the sodium composite oxide and a lithium compound to at least partially ion-exchange Na in the sodium composite oxide to Li.

### Claim 8 (depends on 1)

A non-aqueous electrolyte secondary battery, comprising:
the positive electrode including the positive electrode active material according to claim 1;
a negative electrode; and
a non-aqueous electrolyte.

### Claim 9 (depends on 2)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 2, wherein a ratio I003/I104 satisfies I003/I104>1.0, the ratio being an integrated intensity I003 of a diffraction peak on a (003) plane relative to an integrated intensity I104 of a diffraction peak on a (104) plane of the X-ray diffraction pattern.

### Claim 10 (depends on 3)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 3, wherein a ratio I003/I104 satisfies I003/I104>1.0, the ratio being an integrated intensity I003 of a diffraction peak on a (003) plane relative to an integrated intensity I104 of a diffraction peak on a (104) plane of the X-ray diffraction pattern.

### Claim 11 (depends on 2)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 2, wherein half-value widths of the diffraction peaks on the (108) plane and the (110) plane of the X-ray diffraction pattern are greater than or equal to 0.2° and less than or equal to 0.8°.

### Claim 12 (depends on 3)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 3, wherein half-value widths of the diffraction peaks on the (108) plane and the (110) plane of the X-ray diffraction pattern are greater than or equal to 0.2° and less than or equal to 0.8°.

### Claim 13 (depends on 4)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 4, wherein half-value widths of the diffraction peaks on the (108) plane and the (110) plane of the X-ray diffraction pattern are greater than or equal to 0.2° and less than or equal to 0.8°.

### Claim 14 (depends on 2)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 2, wherein, in the compositional formula LiαNaβNi1-b-cMnbXcOd, a mole ratio (β) of Na satisfies 0≤β≤0.035.

### Claim 15 (depends on 3)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 3, wherein, in the compositional formula LiαNaβNi1-b-cMnbXcOd, a mole ratio (β) of Na satisfies 0≤β≤0.035.

### Claim 16 (depends on 4)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 4, wherein, in the compositional formula LiαNaβNi1-b-cMnbXcOd, a mole ratio (β) of Na satisfies 0≤β≤0.035.

### Claim 17 (depends on 5)

The positive electrode active material for a non-aqueous electrolyte secondary battery according to claim 5, wherein, in the compositional formula LiαNaβNi1-b-cMnbXcOd, a mole ratio (β) of Na satisfies 0≤β≤0.035.