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 2θ = 20.8±1° in a powder X-ray diffraction pattern of the positive electrode active substance as measured using a Cu-Kα 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 relates to Li-Ni composite oxide particles that exhibit a high initial discharge capacity and are excellent in thermal stability when used as a positive electrode active substance for non-aqueous electrolyte secondary batteries, and a process for producing the Li-Ni composite oxide particles. The Li-Ni composite oxide particles of the present invention have a composition of Li x Ni 1-y-a-b Co y M1 a M2 b O 2 wherein x, y, a and b represent 1.00 ≤ x ≤ 1.10; 0
摘要:
The present invention relates to Li-Ni composite oxide particles for a non-aqueous electrolyte secondary battery which have a large charge/discharge capacity and are excellent in thermal stability under a charged condition. The above object can be achieved by the Li-Ni composite oxide particles for a non-aqueous electrolyte secondary battery, comprising a Li-Ni composite oxide whose secondary particles form core particles thereof and have a composition represented by the formula: Li x1 Ni 1-y1-z1-w1 Co y1 Mn z1 M w1 O 2 (in which 0.9 ≤ x1 ≤ 1.3; 0.1 ≤ y1 ≤ 0.3; 0.0 ≤ z1 ≤ 0.3; 0 ≤ w1 s 0.1; and M is at least one metal selected from the group consisting of Al and Fe), wherein a Li-Ni composite oxide having a composition represented by the formula: Li x2 Ni 1-y2-z2-w2 Co y2 Mn z2 M w2 O 2 (in which 0.9 ≤ x2 ≤ 1 + z2; 0 ≤ y2 ≤ 0.33; 0 ≤ z2 ≤ 0.5; 0 ≤ w2 ≤ 0.1; and M is at least one metal selected from the group consisting of Al, Fe, Mg, Zr and Ti, is coated or present on a surface of the respective secondary particles.
摘要:
An object of the present invention is to provide a positive electrode mixture capable of conducting stable charging and discharging with a less amount of gasses generated which has an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium. The present invention relates to a positive electrode mixture comprising carbon black having a bulk density of not more than 0.1 g/cm 3 , a crystallite size of 10 to 40 Å, an iodine adsorption of 1 to 150 mg/g, a volatile content of not more than 0.1% and a metal impurity content of not more than 20 ppm, and a positive electrode active substance having an operating voltage or an initial crystal phase transition voltage of not less than 4.5 V on the basis of lithium.
摘要翻译:本发明的目的是提供一种正极混合物,其能够以较少量的气体进行稳定的充放电,其具有基于锂的工作电压或不小于4.5V的初始晶体相变电压 。 本发明涉及一种正极混合物,其包含炭黑,其堆积密度不超过0.1g / cm 3,微晶尺寸为10至40,碘吸附为1至150mg / g,挥发物含量为 不大于0.1%,金属杂质含量不大于20ppm,以及基于锂的工作电压或初始晶体相变电压不小于4.5V的正极活性物质。
摘要:
The present invention relates to Li-Ni-based composite oxide particles comprising Mn, and Co and/or Al, wherein Co and Al are uniformly dispersed within the particles, and Mn is present with a gradient of its concentration in a radial direction of the respective particles such that a concentration of Mn on a surface of the respective particles is higher than that at a central portion thereof. The Li-Ni-based composite oxide particles can be produced by allowing an oxide and a hydroxide comprising Mn to mechanically adhere to Li-Ni-based oxide comprising Co and/or Al; and then heat-treating the obtained material at a temperature of not lower than 400°C and not higher than 1,000°C. The Li-Ni-based composite oxide particles of the present invention are improved in thermal stability and alkalinity.
摘要:
The present invention relates to Li-Ni composite oxide particles for a non-aqueous electrolyte secondary cell which have a large charge/discharge capacity, an excellent packing density and excellent storage performance. The Li-Ni composite oxide particles for a non-aqueous electrolyte secondary cell which have a composition represented by the formula:
Li x Ni 1-y-z Co y Al z O 2
in which 0.9 2 thereto, and a sulfate ion content of not more than 1.0%, can be produced by mixing Ni-Co hydroxide particles having a sulfate ion content of not more than 1.0% whose surface is coated with an Al compound having a primary particle diameter of not more than 1 µm, with a lithium compound; and calcining the resulting mixture.