Umicore

Umicore Korea, Ltd.

Maxime Blangero

Jens M Paulsen

Da-In Choi

KyungSub Jung

Olesia Karakulina

Bin-Na Yun

JiHye Kim

Jing Zhang

WooRam Cho

Kris Driesen

Xin Xia

Shinichi Kumakura

YuRi Lee

Liang Zhu

Wenlong Yang

Dae-Hyun Kim

TaeHyeon Yang

JinDoo Oh

Donggun Park

Kyubo Kim

KyeongSe Song

Hyunjoo Je

Elsye Agustina

Hyun-Joo Je

KyuBo Kim

Kyungsub Jung

Jindoo Oh

Jihye Kim

A positive electrode active material powder suitable for lithium-ion batteries, comprising lithium transition metal-based oxide particles, said particles comprising a core and a surface layer, said surface layer being on top of said core, said particle comprising the elements: Li, M' and oxygen, wherein M′ has a formula: M′=NiMnCoA, wherein A is a dopant, 0.80≤z≤0.90, 0.05≤y≤0.20, 0.05≤x≤0.20, x+y+z+k=1, and 0≤k≤0.01, said positive electrode active material powder having a median particle size D50 ranging from 5 μm to 15 μm and a surface layer thickness ranging from 10 nm to 200 nm, said surface layer comprising sulfate ion (SO) in a content superior or equal to 6.78·z−4.83 wt % and inferior or equal to 6.78·z−4.33 wt % with respect to the total weight of the positive electrode active material.

Lithium nickel manganese cobalt composite oxide as a positive electrode active material for rechargeable lithium ion batteries

A positive electrode active material powder comprising lithium transition metal-based oxide particles, said 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′=(Niz(Ni0.5Mn0.5)yCox)1-kAk, wherein A is a dopant, 0.60≤z≤0.86, 0.05≤y≤0.20, 0.05≤x≤0.20, x+y+z+k=1, and k≤0.01, said positive electrode active material powder having a median particle size D50 ranging from 5 μm to 15 μm and a surface layer thickness ranging from 10 nm to 200 nm, said surface layer comprising: sulfur in a content superior or equal to 0.150 wt % and inferior or equal to 0.375 wt % with respect to the total weight of the positive electrode active material powder, and aluminum in a content superior or equal to 0.05 wt % and inferior or equal to 0.15 wt % with respect to the total weight of the positive electrode active material powder.

A positive electrode active material powder suitable for lithium-ion batteries comprises lithium transition metal-based oxide particles, said particles comprising a core and a surface layer, said surface layer being on top of said core, said particles comprising the elements: Li, M' and oxygen, wherein M′ has a formula: M′=NiMnCoA, wherein A is a dopant, 0.60≤z≤0.89, 0.05≤y≤0.20, 0.05≤x≤0.20, x+y+z+k=1, and k≤0.01. The positive electrode active material powder has a median particle size D50 ranging from 5 μm to 15 μm, a span ranging from 0.25 to 0.90, and a surface layer thickness ranging from 10 nm to 200 nm. The surface layer comprises:

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

A positive electrode active material powder suitable for lithium-ion batteries, comprising lithium transition metal-based oxide particles, said particles comprising a core and a surface layer, said surface layer being on top of said core, said particles comprising the elements: Li, M' and oxygen, wherein M′ has a formula: M′=NiMnCoA, wherein A is a dopant, 0.60≤z≤0.86, 0.05≤x≤0.20, x+y+z+k=1, and k≤0.01, said positive electrode active material powder having a median particle size D50 ranging from 5 μm to 15 μm and a surface layer thickness ranging from 10 nm to 200 nm, said surface layer comprising:

A positive electrode active material powder suitable for lithium-ion batteries, comprising lithium transition metal-based oxide particles, said particles comprising a core and a surface layer, said surface layer being on top of said core, said particles comprising the elements: Li, M' and oxygen, wherein M′ has a formula: M′=NiMnCoA, wherein A is a dopant, 0.60≤z≤0.90, 0.05≤y≤0.20, 0.05≤x≤0.20, x+y+z+k=1, and k≥0.01,

The present invention relates to positive electrode active materials in rechargeable lithium-ion batteries having a difference in cobalt concentration between the center and the edge of particle.

Positive electrode active material for a rechargeable lithium-ion battery

A precursor compound for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor being either one of a metal-bearing M′-hydroxide, -oxyhydroxide or -carbonate, with M′=NiMnCOAwith x>0, y>0, 0.70≤1-x-y-z≤0.95 and 0≤z<0.1, the precursor comprising having a core comprising a metal-bearing compound M′and a shell comprising a metal-bearing compound M′, wherein M′=NiMnCOAwith 0<xc≤0.2, 0<yc≤0.2, 0≤zc<0.1 and 0.75≤1-x-y-z≤0.95, and M′=NiMnCOAwith 0<xs≤0.25, 0.75<ys≤0.95, 0≤zs<0.1 and 0≤≤0.10.

Precursor of a positive electrode material for a rechargeable lithium-ion battery

A powderous positive electrode material for a lithium secondary battery has the general formula Li[NiMM'M&#x2033;]O. M is one or more elements of the group Mn, Zr and Ti. M&#x2032; is one or more elements of the group Al, B and Co. M&#x2033; is a dopant different from M and M&#x2032;, and x, a, b and c are expressed in mol with &#x2212;0.02&#x2264;x&#x2264;0.02, 0&#x2264;c&#x2264;0.05, 0.10&#x2264;(a+b)&#x2264;0.65 and 0&#x2264;z&#x2264;0.05. The material has an unconstrained cumulative volume particle size distribution value (&#x393;(D10)), a cumulative volume particle size distribution value after having been pressed at a pressure of 200 MPa (&#x393;(D10)) and a cumulative volume particle size distribution value after having been pressed at a pressure of 300 MPa (&#x393;(D10)). When &#x393;(D10) is compared to &#x393;(D10), the relative increase in value is less than 100%. When &#x393;(D10) is compared to &#x393;(D10), the relative increase in value is less than 120%.

Positive electrode materials having a superior hardness strength

A lithium secondary cell having an operating voltage &#x2265;4.35V, comprising a cathode comprising a doped LiCoOactive material, an anode comprising graphite, and an electrolyte comprising a carbonate-based solvent, a lithium salt and both a succinonitrile (SN) and a lithium bis(oxalato)borate (LiBOB) additive wherein during the discharge at 45&#xb0; C. from a state of charge (SOC) of 100% at 4.5V to a SOC of 0 at 3V at a C/10 rate the difference of the SOC at 4.42V and 4.35V is at least 7% but less than 14%, and wherein the active material is doped by at least 0.5 mole % of either one or more of Mn, Mg and Ti.

Lithium battery containing cathode material and electrolyte additives for high voltage application

A lithium cobalt-based oxide cathode active material powder comprising particles having a median particle size D50 of greater than or equal to 20 &#x3bc;m, preferably 25 &#x3bc;m, and less than or equal to 45 &#x3bc;m, said particles having an averaged circularity of greater than or equal to 0.85 and less than or equal to 1.00, said particles having a general formula LiCoAlM'MeO, wherein M&#x2032; and Me comprise at least one element of the group consisting of: Ni, Mn, Nb, Ti, W, Zr, and Mg, with &#x2212;0.01&#x2264;a&#x2264;0.01, 0.002&#x2264;x&#x2264;0.050, 0&#x2264;y&#x2264;0.020 and 0&#x2264;z&#x2264;0.050, said lithium cobalt-based oxide particles having a R-3m structure and (018) diffraction peak asymmetry factor Aof greater than or equal to 0.85 and less than or equal to 1.15, said diffraction peak asymmetry factor being obtained by a synchrotron XRD spectrum analysis with an emission wavelength &#x3bb; value equal to 0.825 &#x212b;.

Powderous lithium cobalt-based oxide compound for rechargeable lithium ion batteries and a method for making thereof

A method for manufacturing a cobalt based hydroxide carbonate compound having a malachite-rosasite mineral structure, comprising the steps of:

Precursors of cathode materials for a rechargeable lithium ion battery

A powderous positive electrode material for a lithium secondary battery, the material having the general formula Li+x[Ni1&#x2212;a&#x2212;b&#x2212;cMaM'bM&#x2033;c]1&#x2212;xO2&#x2212;z; M being either one or more elements of the group Mn, Zr and Ti, M&#x2032; being either one or more elements of the group Al, B and Co, M&#x2033; being a dopant different from M and M&#x2032;, x, a, b and c being expressed in mol with &#x2212;0.02&#x2264;x&#x2264;0.02, 0&#x2264;c&#x2264;0.05, 0.10&#x2264;(a+b)&#x2264;0.65 and 0&#x2264;z&#x2264;0.05; and wherein the powderous material is characterized by having a BET value &#x2264;0.37 m/g, a Dmax&#x3c;50 &#x3bc;m, and a hardness strength index &#x394;&#x393;(P) of no more than 100%+(1&#x2212;2a&#x2212;b)&#xd7;160% for P=200 MPa, wherein (Formula I) (I) with D 10p=0 being the D10 value of the unconstrained powder (P=0 M Pa), r&#xb0;(D 10p=0) being the cumulative volume particle size distribution of the unconstrained powder at D 10p=0, and &#x393;(D 10p=0) being the cumulative volume particle size distribution at D10p=0 of the pressed samples with P being expressed in M Pa.

A lithium secondary cell having an operating voltage &#x2265;4.35 sV, comprising a cathode comprising a doped L1CoOactive material, an anode comprising graphite, and an electrolyte comprising a carbonate-based solvent, a lithium salt and both a succinonitrile (SN) and a lithium bis(oxalato)borate (LiBOB) additive wherein during the discharge at 45&#xb0; C. from a state of charge (SOC) of 100% at 4.5V to a SOC of 0 at 3V at a C/10 rate the difference of the SOC at 4.42V and 4.35V is at least 7% but less than 14%, and wherein the active material is doped by at least 0.5 mole % of either one or more of Mn, Mg and Ti.

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Cheonan, South Korea

Maxime Blangero