Umicore

Umicore Korea, Ltd.

Syensqo Sa

Hee-Sung Gil

JiHye Kim

Jens M Paulsen

Dae-Hyun Kim

Areum Park

Jean-Sébastien Bridel

Mi-Soon Oh

Hyuncheol Lee

Hae-Young Kim

Lawrence Alan Hough

Moon-Hyung Choi

Ji-Hye Won

AReum Park

Jihye 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 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

Growing community of inventors

Cheonan, South Korea

Hee-Sung Gil