Umicore

Umicore Korea, Ltd.

Syensqo Sa

JiHye Kim

Jens M Paulsen

Randy De Palma

Areum Park

Song-Yi Han

Hee-Sung Gil

Maxime Blangero

Dae-Hyun Kim

HeonPyo Hong

Da-In Choi

Kyung-Tae Lee

WooRam Cho

Xin Xia

Kris Driesen

Jing Zhang

Jean-Sébastien Bridel

HyeJeong Yang

Jin Hu

JinDoo Oh

Thomas Lau

AReum Park

Ji-Hye Won

Moon-Hyung Choi

Mi-Soon Oh

Hyuncheol Lee

Lawrence Alan Hough

Jin-Doo Oh

Hae-Young Kim

A liquid electrolyte lithium secondary battery cell comprising: —a positive electrode material comprising a lithium transition metal-based oxide powder having a general formula Li((Ni(NiMn)Co)A)O, wherein A is a dopant, −0.025≤a≤0.025, 0.18≤x≤0.22, 0.42≤z≤0.52, 1.075<z/y<1.625, x+y+z=1 and k≤0.01; and—an electrolyte composition comprising: a) at least one cyclic carbonate, b) at least one fluorinated acyclic carboxylic acid ester, c) at least one electrolyte salt, d) at least one lithium compound selected from lithium phosphate compounds, lithium boron compounds, lithium sulfonate compounds and mixtures thereof, e) at least one cyclic sulfur compound, and f) optionally at least one cyclic carboxylic acid anhydride.

Ni based lithium-ion secondary battery comprising a fluorinated electrolyte

The invention provides a positive electrode material for lithium ion batteries, comprising a lithium transition metal-based oxide powder having a general formula Li((Ni(NiMn)Co)A)O, wherein A is a dopant, with −0.025≤a≤0.025, 0.15≤x≤0.22, 0.42≤z≤0.52, 1.075<z/y<1.300, x+y+z=1 and k≤0.01. Different embodiments provide the following features: the lithium transition metal-based oxide powder has a carbon content ≤1000 ppm or even ≤400 ppm; the lithium transition metal-based oxide powder has a sulfur content between 0.05 and 1.0 wt %; and a dopant A is Zr, and the powder further comprises up to 1 wt % of a coating comprising a boron compound and WO.

Ni based cathode material for rechargeable lithium-ion batteries

The invention provides a positive electrode material for lithium ion batteries, comprising a lithium transition metal-based oxide powder having a general formula Li((Ni(NiMn)Co)A)O, wherein A is a dopant, with −0.025≤a≤0.025, 0.15≤x≤0.22, 0.42≤z≤0.52, 1.075<z/y<1.300, x+y+z=1 and k≤0.01. Different embodiments provide the following features:

A lithium metal oxide powder for a cathode material in a rechargeable battery comprises a core and a surface layer. The surface layer is delimited by an outer and an inner interface. The inner interface is in contact with the core. The cathode material has a layered crystal structure comprising the elements Li, M, and oxygen. M has the formula M=(Ni(NiMn)Co)A, with 0.15≤x≤0.30, 0.20≤z≤0.55, x+y+z=1 and 0<k≤0.1. The Li content is stoichiometrically controlled with a molar ratio 0.95≤Li:M≤1.10. A is at least one dopant and comprises Al. The core at the inner interface has an Al content of 0.3-3 mol %. The surface layer comprises an intimate mixture of Ni, Co, Mn, LiF and AlOdetermined by XPS. The surface layer has a Mn content that decreases from the Mn content at the inner interface to less than 50% of the Mn content at the outer interface.

Lithium nickel-manganese-cobalt oxide cathode powders for high voltage lithium-ion batteries

A powderous positive electrode material for lithium ion batteries, comprising crystalline lithium transition metal-based oxide particles having a general formula Li((Ni(NiMn)Co)A)O, wherein A is a dopant, −0.030≤a≤0.025, 0.10≤x≤0.40, 0.25≤z≤0.52, x+y+z=1 and k≤0.01, wherein the crystalline powder has a crystallite size less than 33 nm as determined by the Scherrer equation based on the peak of the (104) plane obtained from the X-ray diffraction pattern using a Cu K α radiation source, and wherein the molar ratio MR(Ni) of Ni versus the total transition metal content in a cross section of a particle is higher in the surface area than in the center area of the particle, as determined by EDS analysis.

Lithium transition metal composite oxide as a positive electrode active material for rechargeable lithium secondary batteries

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 crystalline precursor compound for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor having a general formula Li((Ni(NiMn)Co)A)O, wherein A comprises at least one element of the group consisting of: Mg, Al, Ca, Si, B, W, Zr, Ti, Nb, Ba, and Sr, with 0.05&#x2264;x&#x2264;0.40, 0.25&#x2264;z&#x2264;0.85, x+y+z=1, 0&#x2264;k&#x2264;0.10, and 0&#x2264;a&#x2264;0.053, wherein said crystalline precursor powder has a crystalline size L, expressed in nm, with 15&#x2264;L&#x2264;36.

Precursor and method for preparing Ni based cathode material for rechargeable lithium ion batteries

A positive electrode active material for a lithium ion battery comprises a lithium transition metal-based oxide powder, the powder comprising single crystal monolithic particles comprising Ni and Co and having a general formula Li(NiMnCoZrA)O, wherein A is a dopant, &#x2212;0.025&#x2264;a&#x3c;0.005, 0.60&#x2264;z&#x2264;0.95, y&#x2264;0.20, 0.05&#x2264;x&#x2264;0.20, k&#x2264;0.20, 0&#x2264;q&#x2264;0.10, and x+y+z+k+q=1. The particles have 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 crystalline precursor compound for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor having a general formula Li((Ni(NiMn)Co)A)O, wherein x+y+z=1, 0.1&#x2264;x&#x2264;0.4, 0.25&#x2264;z&#x2264;0.52, A is a dopant, 0&#x2264;k&#x2264;0.1, and 0.03&#x2264;a&#x2264;0.35, wherein the precursor has a crystalline size L expressed in nm, with 15&#x2264;L&#x2264;36. Also a method is described for manufacturing a positive electrode material having a general formula Li'M&#x2032;&#x2212;O, with M&#x2032;=(Ni(NiMn)CO)A, wherein x+y+z=1.0.1&#x2264;x&#x2264;0.4, 0.25&#x2264;z&#x2264;0.52, A is a dopant, 0&#x2264;k&#x2264;0.1, and 0.01&#x2264;a&#x2032;&#x2264;0.10, by sintering the lithium deficient precursor powder mixed with either one of LiOH, LiOH.HO, in an oxidizing atmosphere at a temperature between 800 and 1000&#xb0; C., for a time between 6 and 36 hrs.

A lithium metal oxide powder for a cathode material in a rechargeable battery, consisting of a core and a surface layer, the surface layer being delimited by an outer and an inner interface, the inner interface being in contact with the core, 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&#x3c;k&#x2264;0.1, wherein the Li content is stoichiometrically controlled with a molar ratio 0.95&#x2264;Li:M&#x2264;1.10; wherein A is at least one dopant and comprises Al; wherein the core has an Al content of 0.3-3 mol % and a F content of less than 0.05 mol %; and wherein the surface layer has an Al content that increases continuously from the Al content of the core at the inner interface to at least 10 mol % at the outer interface, and a F content that increases continuously from less than 0.05 mol % at the inner interface to at least 3 mol % at the outer interface, the Al and F contents in the surface layer being determined by XPS. The surface layer may also have a Mn content that decreases continuously from the Mn content of the core at the inner interface, to less than 50% of the Mn content of the core at the outer interface.

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 crystalline precursor compound is described for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor having a general formula Li((Ni(NiMn)y Co)A)O, wherein x+y+z=1, 0.1&#x2264;x&#x2264;0.4, 0.25&#x2264;z&#x2264;0.55, A is a dopant, 0&#x2264;k&#x2264;0.1, and 0.04&#x2264;a&#x2264;0.50, wherein the precursor has a crystalline size L expressed in nm, with 77&#x2212;(67*z)&#x2264;L&#x2264;97&#x2212;(67*z). Also a method is described for manufacturing a positive electrode material having a general formula Li((Ni(NiMn)Co)A)O, wherein x+y+z=1, 0.1&#x2264;x&#x2264;0.4, 0.25&#x2264;z&#x2264;0.55, A is a dopant, 0&#x2264;k&#x2264;0.1, and 0.01&#x2264;a'&#x2264;0.10 by sintering the crystalline precursor compound in an oxidizing atmosphere at a temperature T between 800 and 1000&#xb0; C., for a time t between 6 and 36 hrs.

Precursor and method for preparing Ni based Li transition metal oxide cathodes for rechargeable batteries

The invention provides a cathode active material for use in a rechargeable battery, comprising a coated lithium nickel oxide powder or a coated lithium nickel manganese oxide powder, the powder being composed of primary particles provided with a glassy lithium silicate surface coating. A method for preparing the cathode active material comprises the steps of:

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Cheonan, South Korea

JiHye Kim