Abstract:
A lithium transition metal oxide powder for a positive electrode material in a solid-state lithium ion battery, the powder consisting of particles having a core and a surface layer consisting of an inner and an outer layer, wherein the powder has a D50 between 35 and 60 μm, wherein the core has the general formula LixCoO2 with 0.99
Abstract:
The invention provides a positive electrode material for lithium ion batteries, comprising a lithium transition metal-based oxide powder having a general formula Li1+a ((Niz(Ni0.5Mn0.5)y Cox)1−kAk)1−aO2, wherein A is a dopant, with −0.025≤a≤0.025, 0.15≤x≤0.22, 0.42≤z≤0.52, 1.075
Abstract:
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 Li1−a((Niz(Ni1/4 Mn1/4)y M′x)1−kAk)1+a02, wherein x+y+z=1, 0
Abstract:
A powderous lithium metal oxide material having a cubic structure with space group Fd-3m and having the formula Li1−a[(NibMna1−b)1−xTixAy]2+aO4 with 0.005≤x≤0.018, 0≤y≤0.05, 0.01≤a≤0.03, 0.18≤b≤0.28, wherein A is one or more elements from the group of the metal elements excluding Li, Ni, Mn and Ti.
Abstract:
A method for preparing a positive electrode material for a rechargeable lithium battery, comprising the steps of: providing a Li metal (M) oxide electroactive material, providing an inorganic oxidizing chemical compound, providing a chemical that is a Li-acceptor, mixing the Li metal (M) oxide, the oxidizing compound and the Li-acceptor, and heating the mixture at a N temperature between 200 and 800° C. in an oxygen comprising atmosphere. In an embodiment the positive electrode material comprises a Li metal (M) oxide electroactive material, and between 0.15 and 5 wt % of a LiNaSO4 secondary phase. The Li metal oxide may have the general formula Li1+a′M1−aO2, with a′
Abstract:
A sodium transition metal cathode material for a rechargeable sodium battery having a P2 layered bronze crystal structure, comprising at least 55 mol % manganese, wherein the manganese valence state is at least 3.75. The material undergoes a structural transformation to a secondary cathode material by extraction of sodium during the 1st charge of a rechargeable sodium battery comprising the sodium cathode material. The material has either a composition NaxMO2 where M=Mn1-y-zLiyAz where z
Abstract:
A positive electrode composition for a rechargeable battery, the composition comprising a first and a second powderous lithium metal oxide, the first lithium metal oxide comprising either one or more of Ni, Mn and Co, the second lithium metal oxide powder having either: the formula LixWM′yOz, M′ being a metal having a valence state of +2 or +3, with 0
Abstract:
The present invention provides a positive electrode active material for lithium-ion secondary batteries, comprising: (i) a first lithium transition metal oxide, comprising single-crystalline particles having a median particle size D50A of between 3 μm and 15 μm, as determined by laser particle size analysis, and (ii) a second lithium transition metal oxide, comprising single-crystalline particles having a median particle size D50B of between 0.5 μm and 3 μm, as determined by laser particle size analysis, wherein a weight fraction φB of said second lithium transition metal oxide with respect to the total weight of said positive electrode active material is between 5 wt. % and 40 wt. %.
Abstract:
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 Li1-a((Niz(Ni0.5Mn0.5)yCox)1-kAk)1+aO2, 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≤x≤0.40, 0.25≤z≤0.85, x+y+z=1, 0≤k≤0.10, and 0≤a≤0.053, wherein said crystalline precursor powder has a crystalline size L, expressed in nm, with 15≤L≤36.
Abstract:
A carbonate precursor compound for manufacturing a lithium metal (M)-oxide powder usable as an active positive electrode material in lithium-ion batteries, M comprising 20 to 90 mol % Ni, 10 to 70 mol % Mn and 10 to 40 mol % Co, the precursor further comprising a sodium and sulfur impurity, wherein the sodium to sulfur molar ratio (Na/S) is 0.4