Umicore

Umicore Korea, Ltd.

Tokyo University of Science Foundation

Shinichi Kumakura

Jens M Paulsen

TaeHyeon Yang

Song-Yi Han

Maxime Blangero

Shinichi Komaba

Kei Kubota

Xin Xia

Jing Zhang

Areum Park

Da-In Choi

HyeJeong Yang

Yoshiyuki Tahara

Yagmur Celasun

Jukyoung Lee

Elsye Agustina

A positive electrode active material powder suitable for lithium-ion batteries, comprising lithium transition metal-based oxide particles comprising a core and a surface layer, said surface layer being on top of said core, said particles comprising the elements: Li, a metal M' and oxygen, wherein the metal M′ has a formula: M′=(NiMnCo)A, wherein A is a dopant, 0.55≤z≤0.89, 0.05≤y≤0.25, 0.05≤x≤0.25, x+y+z+k=1, and k≤0.01, said positive electrode active material powder having a mean particle size D50 ranging from 3 μm to 15 μm and a surface layer thickness ranging from 5 nm to 200 nm. The surface layer comprises aluminum in a content superior or equal to 0.04 wt % and inferior or equal to 0.15 wt % relative to the total weight of the positive electrode active material.

As a positive electrode active material for rechargeable lithium ion batteries

The invention provides a positive electrode active material for a lithium ion battery, comprising a lithium transition metal-based oxide powder, the powder comprising single crystal monolithic particles comprising Ni and Co and having a general formula Li((Ni(NiMn)Co)A)02, wherein A is a dopant, &#x2212;0.02&#x3c;a&#x2264;0.06, 0.10&#x2264;x&#x2264;0.35, 0&#x2264;z&#x2264;0.90, x+y+z=1 and k&#x2264;0.01, the particles having a cobalt concentration gradient wherein the particle surface has a higher Co content than the particle center.

Positive electrode material for rechargeable lithium ion batteries

A method for preparing a N(M)C-based positive electrode materials according to the present invention comprises the following steps: &#x2014;Precipitation of a metal (at least Ni&#x2014; and Co&#x2014;, preferably comprising Mn&#x2014;) bearing precursor (MBP), &#x2014;Fractionation of the MBP in a first (A) fraction and at least one second (B) fraction, &#x2014;Lithiation of each of the first and second fraction, wherein the A fraction is converted into a first polycrystalline lithium transition metal oxide-based powder and the B fraction(s) is(are) converted into a second lithium transition metal oxide-based powder and, and &#x2014;Mixing the first and second monolithic lithium transition metal oxide-based powder to obtain the N(M)C-based positive electrode material.

Positive electrode material for rechargeable lithium ion batteries and methods of making thereof

A positive electrode for a rechargeable battery, comprising a lithium metal oxide powder having a layered crystal structure and having the formula LiTmHmO, with 3&#x2264;x&#x2264;4.8, 0.60&#x2264;y&#x2264;2.0, 0.60&#x2264;z&#x2264;2.0, and x+y+z=6, wherein Tm is one or more transition metals of the group consisting of Mn, Fe, Co, Ni, and Cr; wherein Hm is one or more metals of the group consisting of Zr, Nb, Mo and W. The lithium metal oxide powder may comprise dopants and have the formula LiTmHmM&#x2033;O&#x2014; &#x3b4;A&#x3b4;, wherein A is either one or more elements of the group consisting of F, S or N; and M&#x2033; is either one or more metal of the group consisting of Ca, Sr, Y, La, Ce and Zr, with either &#x3b4;&#x3e;0 or m&#x3e;0, &#x3b4;&#x2264;0.05, m&#x2264;0.05 and x+y+z+m=6.

Cathode material for a lithium-ion rechargeable battery

This invention discloses a lithium metal oxide powder for a cathode material in a rechargeable battery, consisting of a core and a surface layer, the core having a layered crystal structure comprising the elements Li, M and oxygen, wherein M has the formula M=(Ni(NiMn)Co)A, with 0.15&#x2264;x&#x2264;0.30, 0.20&#x2264;z&#x2264;0.55, x+y+z=1 and 0&#x2264;k&#x2264;0.1, wherein A is a dopant, wherein the Li content is stoichiometrically controlled with a molar ratio 0.95&#x2264;Li:M&#x2264;1.10; and wherein the surface layer comprises the elements Li, M' and oxygen, wherein M&#x2032; has the formula M&#x2032;=(Ni(NiMn)Co)A, with x&#x2032;+y&#x2032;+z&#x2032;=1 and 0&#x2264;k&#x2032;&#x2264;0.1, and wherein y&#x2032;/(y&#x2032;+2z&#x2032;)&#x2265;1.1*[y/(y+2z)]. The surface layer may also comprise at least 3 mol % Al, the Al content in the surface layerbeing determined by XPS.

Lithium metal oxide cathode powders for high voltage lithium-ion batteries

A sodium transition metal based cathode material for a rechargeable sodium battery, having a P2 orthorhombic layered bronze crystal structure with space group Cmcm, and having a composition NaMMnLiAOwith 0.60&#x3c;x&#x3c;0.95, wherein M consists of either one or more elements of the group consisting of Cu, Zn and Ni; A consisting of either one or more elements of the group consisting of Mg, Ti, Fe, Cr and Co, with 0&#x3c;y&#x3c;0.20, 0&#x2264;z&#x3c;0.2, 0&#x2264;y'&#x3c;0.33, and z+y&#x2032;&#x3e;0.

Bivalent metal doping for sodium manganese oxide as cathode materials for sodium ion batteries

A layered lithium metal oxide powder for a cathode material used in a rechargeable battery, with the general formula (1&#x2212;x)[LiA][COM][ON'].xLiPO, with 0.0001&#x2264;x&#x2264;0.05, 0.90&#x2264;a&#x2264;1.10, 0&#x3c;b+c&#x2264;0.1, &#x2212;0.1&#x2264;d&#x2264;0.1 and e&#x2264;0.05, wherein A and M are one or more elements including at least one of the group consisting of Mg, Ti and Al; wherein N&#x2032; is either one or more dopants of the group consisting of F, S, N and P; the powder consisting of a core and an ion-conductive electron-insulating surface layer, the core having a layered crystal structure and the surface layer comprising a mixture of elements of the core material, oxides comprising either one or more elements of the group consisting of Mg, Ti and Al; and LiPO.

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Kobe, Japan

Shinichi Kumakura