摘要:
The present invention relates to a method for manufacturing cathode active material for a lithium secondary battery. The manufacturing method according to the present invention is characterized by including: (1) an intermediate generation process, wherein an intermediate which is powder or a shaped object containing the first material compound which is a compound of the transition metal other than lithium, which constitutes said lithium composite oxide, is generated, (2) a lithium source compound addition process, wherein the second material compound which is a lithium compound is added so that the second material compound in the shape of film may adhere to the surface of said intermediate, and (3) a sintering process, wherein lithium composite oxide is generated by sintering said intermediate in the state where said second material compound has adhered to its surface.
摘要:
The lithium secondary battery cathode active material having a layered rock salt structure is characterized in that the material is formed of a plurality of primary particles having a mean particle size of 0.01 to 5 μm, and contains secondary particles having a mean particle size of 1 to 100 μm and an aspect ratio, which is a ratio of long axis diameter to short axis diameter, of 1.0 or more and less than 2; and that the primary particles forming the secondary particles have a (003) plane orientation degree of 50% or higher.
摘要:
The invention provides lithium secondary battery cathode active material particle, which is formed as a secondary particle that is a mass of a plurality of single-crystal primary particles of a lithium-nickel-based complex oxide having a layered rock salt structure, wherein the primary particles have a mean particle size of 0.01 to 5 μm, and the secondary particle has an aspect ratio, which is a ratio of long axis diameter to short axis diameter, of 1.0 or more and less than 2 and a mean particle size of 1 to 100 μm, wherein the (003) planes of the second particle are substantially uniaxially oriented.
摘要:
A plate-like polycrystalline particle is produced by forming inorganic particles into a self-supported, sheet-like shaped body with a predetermined thickness, firing the shaped body, and crushing and classifying the fired shaped body by passing through a mesh having openings with a predetermined size. The inorganic particles are composed of an oxide having a perovskite structure and grow into crystal grains with an isotropic and polyhedral shape. Since grain growth in the thickness direction is limited and grain growth in the surface direction of the sheet is promoted, it is possible to obtain crystal grains having a high aspect ratio and a high degree of orientation. Therefore, in the plate-like polycrystalline particle, in most parts, the number of crystal grains present in the thickness direction of the particle at any one point is one, and a high aspect ratio and a high degree of orientation are achieved.
摘要:
An object of the present invention is to provide a lithium secondary battery which has improved capacity, durability, and rate characteristic as compared with conventional lithium secondary batteries. A plate-like particle or a film for a lithium secondary battery cathode active material is represented by the following general formula: General formula: Lip(Nix,Coy,Alz)O2 (wherein 0.9≦p≦1.3, 0.6
摘要:
A crystallographically-oriented ceramic including first regions, in which crystal nuclei remain and which contain a specific element in a predetermined concentration range and extend at least partially in a layered shape along a crystal plane, and second regions, which contain the specific element in a different concentration range from the first regions and extend at least partially in a layered shape along the crystal plane. The regions are alternately repeated, and a compositional distribution exists in a direction orthogonal to the crystal plane. In the first region, the concentration of Na is higher, the concentration of K is lower, the concentration of Nb is lower, and the concentration of Ta is higher than the second region, and in the second region, the concentration of Na is lower, the concentration of K is higher, the concentration of Nb is higher, and the concentration of Ta is lower than the first region.
摘要:
An electron emitter includes an emitter layer formed of a dielectric material, an upper electrode, and a lower electrode. A drive voltage is applied between the upper electrode and the lower electrode, for emitting electrons. The upper electrode is formed of scale-like conductive particles on the upper surface of the emitter layer and has a plurality of opening portions. The surfaces of overhanging portions of the opening portions that face the emitter layer are apart from the emitter layer. The overhanging portions each have such a cross-sectional shape as to be acutely pointed toward the inner edge of the opening portion, or the tip end of the overhanging portion, so that lines of electric force concentrate at the inner edge.
摘要:
An object of the present invention is to provide a lithium secondary battery which has improved capacity, durability, and the other characteristic as compared with conventional lithium secondary batteries. A plate-like particle or a film for a lithium secondary battery cathode active material has a layered rock salt structure. The lithium ion gateway plane is oriented in parallel with a plate surface, which is a surface orthogonal to a thickness direction of the particle and thus exposed at the plate surface, a plurality of layers are stacked together in the thickness direction, and while the layers have the same crystal axis in the thickness direction, as for the plate surface direction perpendicular to the thickness direction, the layers have different crystal axes.
摘要:
An object of the present invention is to improve the characteristics such as cell capacity, by raising the exposure of a crystal plane (a plane other than the (003) plane: e.g., (101) plane and (104) plane), through which lithium ions are favorably intercalated and deintercalated, to an electrolyte. A plate-like particle or a film for a lithium secondary battery cathode active material has a layered rock salt structure. A plane other than the (003) plane is oriented in parallel with the plate surface (a surface orthogonal to a thickness direction) and step-like structures are two-dimensionally formed along the plate surface.
摘要:
A ceramic sheet 20 is produced by a method in which inorganic particles including, as a main component, an oxide represented by general formula ABO3 and containing a volatile component are mixed such that the A/B ratio is 1.05 or more, the inorganic particles are formed into a self-supported planar shaped body with a thickness of 30 μm or less, and the shaped body is fired, without an inactive layer or with an inactive layer which does not substantially react with the shaped body and is disposed adjacent to the shaped body, at a temperature-rising rate of 30° C./min or more in a temperature range which is equal to or higher than a temperature at which the volatile component is volatilized.