A method of forming an active material for a positive electrode of a lithium-ion battery includes quenching a powder of the active material in water. The active material may include layered lithium rich nickel manganese oxide.

The disclosure set forth herein is directed to battery devices and methods therefor. More specifically, embodiments of the instant disclosure provide a battery electrode that comprises both intercalation chemistry material and conversion chemistry material, which can be used in automotive applications. There are other embodiments as well.

The disclosure set forth herein is directed to battery devices and methods therefor. More specifically, embodiments of the instant disclosure provide a battery electrode that comprises both intercalation chemistry material and conversion chemistry material, which can be used in automotive applications. There are other embodiments as well.

A positive electrode active material for a lithium ion secondary battery, includes lithium-nickel composite oxide particles and a coating layer that covers at least a part of surfaces of the lithium-nickel composite oxide particles, in which components other than oxygen of the lithium-nickel composite oxide are represented by Li:Ni:Co:M=t:1−x−y:x:y (where, M is at least one element selected from the group consisting of Mg, Al, Ca, Si, Ti, V, Fe, Cu, Cr, Zn, Zr, Nb, Mo, or W, 0.95≤t≤1.20, 0<x≤0.22, and 0≤y≤0.15), the coating layer contains a Ti compound, and a Ti amount per 1 m.sup.2 surface area of the lithium-nickel composite oxide is 7.0 μmol or more and 60 μmol or less.

The invention relates to a solid electrolyte material, solid electrolyte, method for producing the solid electrolyte, and all-solid-state battery, and the solid electrolyte material includes lithium, tantalum, phosphorus, and oxygen as constituent elements and includes at least one element selected from boron, niobium, bismuth, and silicon as a constituent element, and satisfies any of requirements (I) to (III). Requirement (I): A peak top of a .sup.31P-NMR spectrum of the solid electrolyte material is in the range of −9.5 to 5.0 ppm. Requirement (II): A peak top of a .sup.7Li-NMR spectrum of the solid electrolyte material is in the range of −2.00 to 0.00 ppm. Requirement (III): A peak top of a .sup.31P-NMR spectrum of the solid electrolyte material is in the range of −9.5 to 5.0 ppm, and a peak top of a .sup.7Li-NMR spectrum of the solid electrolyte material is in the range of −2.00 to 0.00 ppm.

One embodiment of the present invention relates to a solid electrolyte material, a solid electrolyte, a method for producing the solid electrolyte, or an all-solid-state battery, and the solid electrolyte material includes lithium, tantalum, phosphorus, and oxygen as constituent elements and has a content of the phosphorus element of more than 5.3 atomic % and less than 8.3 atomic %, and is amorphous.

A composition includes a first portion including Ni-rich LiNi.sub.xCo.sub.γMn.sub.zO.sub.2, where 0.5<x<1, 0<y<1, 0<z<1; a second portion including Li.sub.αZr.sub.βO.sub.γ, where 0<α<9, 0<β<3, and 1<γ<10 such that the second portion is coated on the first portion, and the first portion is doped with an elemental metal selected from at least one of Zr, Si, Sn, Nb, Ta, Al, and Fe. A method of forming a composition includes mixing a metal precursor with nickel-cobalt-manganese (NCM) precursor to form a first mixture; adding a lithium-based compound to the first mixture to form a second mixture; and calcining the second mixture at a predetermined temperature for a predetermined time to form the composition.

A composition includes a first portion including Ni-rich LiNi.sub.xCo.sub.γMn.sub.zO.sub.2, where 0.5<x<1, 0<y<1, 0<z<1; a second portion including Li.sub.αZr.sub.βO.sub.γ, where 0<α<9, 0<β<3, and 1<γ<10 such that the second portion is coated on the first portion, and the first portion is doped with an elemental metal selected from at least one of Zr, Si, Sn, Nb, Ta, Al, and Fe. A method of forming a composition includes mixing a metal precursor with nickel-cobalt-manganese (NCM) precursor to form a first mixture; adding a lithium-based compound to the first mixture to form a second mixture; and calcining the second mixture at a predetermined temperature for a predetermined time to form the composition.

A secondary battery includes a positive electrode, a negative electrode including a negative electrode active material, and an electrolytic solution. The negative electrode active material includes a lithium-silicon-containing oxide that includes lithium and silicon as constituent elements and includes magnesium present on a surface layer of the lithium-silicon-containing oxide. The lithium-silicon-containing oxide includes a phase including silicon and a phase including at least one kind of lithium silicate represented by Formula (1). A range in which magnesium is present is within a range of greater than or equal to 10 nm and less than or equal to 3000 nm from a surface of the lithium-silicon-containing oxide in a depth direction. Magnesium forms at least one kind of magnesium silicate represented by Formula (2). A ratio of a number of moles of magnesium to a number of moles of lithium is greater than or equal to 0.1 mol % and less than or equal to 20 mol %,

Li.sub.aSi.sub.bO.sub.c  (1) where a, b, and c satisfy 1≤a≤6, 1≤b≤3, and 1≤c≤7, respectively,

Mg.sub.xSi.sub.yO.sub.z  (2) where x, y, and z satisfy 1≤x≤3, 1≤y≤2, and 1≤z≤4, respectively.

Provided is a lithium ion secondary battery including Li.sub.4Ti.sub.5O.sub.12 particles in a negative electrode active material layer and having both high heat generation suppressing performance during overcharging, and high storage stability in a high SOC region. The lithium ion secondary battery herein disclosed includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode has a positive electrode active material layer. The positive electrode active material layer includes Li.sub.3PO.sub.4 as a secondary material. The negative electrode has a negative electrode active material layer. The negative electrode active material layer includes Li.sub.4Ti.sub.5O.sub.12 as a secondary material. The Li.sub.3PO.sub.4 content in the positive electrode active material layer is 0.5 mass % or more and 5.0 mass % or less. The Li.sub.4Ti.sub.5O.sub.12 content in the negative electrode active material layer is 0.5 mass % or more and 5.0 mass % or less.