摘要:
The present invention relates to positive electrode active substance particles comprising a compound having at least a crystal system belonging to a space group of R-3m and a crystal system belonging to a space group of C2/m, the positive electrode active substance particles having a specific intensity ratio; a content of Mn in the positive electrode active substance particles being controlled such that a molar ratio of Mn/(Ni + Co + Mn) therein is not less than 0.55; and the positive electrode active substance particles comprising an element A (that is at least one element selected from the group consisting of Si, Zr and Y) in an amount of 0.03 to 5% by weight and having a tap density of 0.8 to 2.4 g/cc and a compressed density of 2.0 to 3.1 g/cc. The positive electrode active substance particles can be produced by calcining a mixture of precursor particles comprising the element A, Mn, Ni and/or Co, and a lithium compound.
摘要:
The present invention relates to Li-Ni composite oxide particles having a composition of Li x (Ni y Co 2(1-y)/5 Mn 3(1-y)/5 ) 1-z M z O 2 wherein x, y and z represent 1.00 ≤ x ≤ 1.10; 0.65
摘要翻译:本发明涉及具有Li x(Ni y Co 2(1-y)/ 5 Mn 3(1-y)/ 5)1-z M z O 2组成的Li-Ni复合氧化物颗粒,其中x,y z代表1.00‰¤x‰¤1.10; 0.65
摘要:
The present invention relates to positive electrode active substance particles comprising a compound having at least a crystal system belonging to a space group of R-3m and a crystal system belonging to a space group of C2/m, and boron, wherein the compound is a composite oxide comprising at least Li, Mn, and Co and/or Ni; a relative intensity ratio [(a)/(b)] of a maximum diffraction peak intensity (a) observed at 2¸ = 20.8±1° in a powder X-ray diffraction pattern of the positive electrode active substance as measured using a Cu-K± ray to a maximum diffraction peak intensity (b) observed at 28 = 18.6±1° in the powder X-ray diffraction pattern, is 0.02 to 0.5; a content of Mn in the positive electrode active substance particles is controlled such that a molar ratio of Mn/(Ni + Co + Mn) therein is not less than 0.55; and the positive electrode active substance particles comprise the boron in an amount of 0.001 to 3% by weight. The positive electrode active substance particles of the present invention are produced by calcining a mixture comprising precursor particles comprising Mn, and Ni and/or Co, a lithium compound and a boron compound at a temperature of 500 to 1500°C. The positive electrode active substance particles of the present invention can provide a secondary battery which can be improved in charge/discharge capacity and cycle characteristics.
摘要:
The present invention aims at providing lithium manganate having a high output and an excellent high-temperature stability. The above aim can be achieved by lithium manganate particles having a primary particle diameter of not less than 1 µm and an average particle diameter (D 50 ) of kinetic particles of not less than 1 µm and not more than 10 µm, which are substantially in the form of single crystal particles and have a composition represented by the following chemical formula: Li 1+x Mn 2-x-y Y y O 4 in which Y is at least one element selected from the group consisting of Al, Mg and Co; x and y satisfy 0.03 ‰¤ x ‰¤ 0.15 and 0.05 ‰¤ y ‰¤ 0.20, respectively, wherein the Y element is uniformly dispersed within the respective particles, and an intensity ratio of I(400)/I(111) thereof is not less than 33% and an intensity ratio of I(440)/I(111) thereof is not less than 16%.
摘要:
The present invention relates to positive electrode active substance particles comprising a compound having at least a crystal system belonging to a space group of R-3m and a crystal system belonging to a space group of C2/m, the positive electrode active substance particles having a specific intensity ratio; a content of Mn in the positive electrode active substance particles being controlled such that a molar ratio of Mn/(Ni + Co + Mn) therein is not less than 0.55; and the positive electrode active substance particles comprising an element A (that is at least one element selected from the group consisting of Si, Zr and Y) in an amount of 0.03 to 5% by weight and having a tap density of 0.8 to 2.4 g/cc and a compressed density of 2.0 to 3.1 g/cc. The positive electrode active substance particles can be produced by calcining a mixture of precursor particles comprising the element A, Mn, Ni and/or Co, and a lithium compound.
摘要:
The present invention relates to lithium composite compound particles having a composition represented by the formula: Li 1+x Ni 1-y-z Co y M z O 2 (M = B or Al), wherein the lithium composite compound particles have an ionic strength ratio A (LiO - /NiO 2 - ) of not more than 0.3 and an ionic strength ratio B (Li 3 CO 3 + /Ni + ) of not more than 20 as measured on a surface of the respective lithium composite compound particles using a time-of-flight secondary ion mass spectrometer. The lithium composite compound particles of the present invention can be used as a positive electrode active substance of a secondary battery which has good cycle characteristics and an excellent high-temperature storage property.
摘要:
The present invention relates to lithium manganate particles having a primary particle diameter of 1 to 8 µm and forming substantially single-phase particles, which have a composition represented by the following chemical formula: €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒLi 1+x Mn 2-x-y Y1 y O 4 + Y2 in which Y1 is at least one element selected from the group consisting of Ni, Co, Mg, Fe, Al, Cr and Ti; Y2 is P and is present in an amount of 0.01 to 0.6 mol% based on Mn; and x and y satisfy 0.03 ‰¤ x ‰¤ 0.15 and 0.05 ‰¤ y ‰¤ 0.20, respectively, and which lithium manganate particles have a specific surface area of the lithium manganate particles of 0.3 to 0.9 m 2 /g (as measured by BET method); and have an average particle diameter (D 50 ) of the lithium manganate particles of 3 to 10 µm. A positive electrode active substance of a lithium ion secondary battery using the lithium manganate particles of the present invention has a high output and is excellent in high-temperature stability.