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.

A negative electrode for a lithium secondary battery, a method for preparing a negative electrode for a lithium secondary battery, and a lithium secondary battery including the negative electrode. The negative electrode for a lithium secondary battery includes a negative electrode current collector layer, a first negative electrode active material layer on one surface or both surfaces of the negative electrode current collector layer, and a second negative electrode active material layer on a surface opposite to a surface of the first negative electrode active material layer facing the negative electrode current collector layer.

An anode active material for lithium-ion battery is provided. The anode active material includes a composite material comprising a binary or multi-element metal alloy and a conductive material. The binary or multi-element metal alloy is granular, a particle size of a binary or multi-element metal alloy particle is in micron-sized, and the binary or multi-element metal alloy has lattice reversibility. The conductive material is coated on a surface of a binary or multi-element metal alloy particle. The binary or multi-element metal alloy particle is completely wrapped by the conductive material. A method of making the anode active material is also provided. A lithium-ion battery using the anode active material is also provided.

Batteries, coating materials and methods for cathode active materials, composition of cathode electrode sheets are disclosed. The battery includes a cathode selected from the group consisting of a nickel-rich material and an iron phosphate material and an ionic-electronic conducting polymeric coating on the cathode.

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.

Articles and methods including composite layers for protection of electrodes in electrochemical cells are provided. In some embodiments, the composite layers comprise a polymeric material and a plurality of particles.

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.

A positive electrode active material includes a center portion including a first lithium transition metal oxide with an average composition represented by Formula 1,
Li.sub.1+a1(Ni.sub.b1Co.sub.c1Mn.sub.d1Al.sub.e1M.sup.1.sub.f1)O.sub.2  [Formula 1] wherein, in Formula 1, −0.1≤a1≤0.2, 0.8≤b1<1.0, 0<c1≤0.2, 0<d1≤0.1, 0<e1≤0.05, 0≤f1≤0.05, b1/c1≤25, and b1/d1≥20, and M.sup.1 includes at least one selected from the group consisting of Mg, Ti, Zr, Nb, and W, and a surface portion including a second lithium transition metal oxide with an average composition represented by Formula 2,
Li.sub.1+a2(Ni.sub.b2Co.sub.c2Mn.sub.d2Al.sub.e2M.sup.1.sub.f2)O.sub.2  [Formula 2] wherein, in Formula 2, −0.1≤a2≤0.2, 0.6≤b2≤0.95, 0≤c2≤0.2, 0≤d2≤0.1, 0≤e2≤0.05, 0≤f2≤0.05, b2/c2≤13, and b2/d2≥3, and M.sup.1 includes at least one selected from the group consisting of Mg, Ti, Zr, Nb, and W.

The present invention relates to composite particles containing silicon and carbon, wherein a domain size region of vacancies of 2 nm or less is 44% by volume or more and 70% by volume or less when volume distribution information of domain sizes obtained by fitting a small-angle X-ray scattering spectrum of the composite particles with a spherical model in a carbon-vacancy binary system is accumulated in ascending order, and a true density calculated by dry density measurement by a constant volume expansion method using helium gas is 1.80 g/cm.sup.3 or more and 2.20 g/cm.sup.3 or less.

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.