摘要:
The present invention provides a precursor of positive electrode active substance particles for non-aqueous electrolyte secondary batteries which have a high discharge voltage and a high discharge capacity, hardly suffer from side reactions with an electrolyte solution, and are excellent in cycle characteristics, positive electrode active substance particles for non-aqueous electrolyte secondary batteries, and processes for producing these particles, and a non-aqueous electrolyte secondary battery. The present invention relates to positive electrode active substance particles for non-aqueous electrolyte secondary batteries having a spinel structure with a composition represented by the following chemical formula (1), in which the positive electrode active substance particles satisfy the following characteristic (A) and/or characteristic (B) when indexed with Fd−3m in X-ray diffraction thereof: (A) when indexed with Fd−3m in X-ray diffraction of the positive electrode active substance particles, a ratio of I(311) to I(111) [I(311)/I(111)] is in the range of 35 to 43%, and/or (B) when indexed with Fd−3m in X-ray diffraction of the positive electrode active substance particles, a gradient of a straight line determined by a least square method in a graph prepared by plotting sin θ in an abscissa thereof and B cos θ in an ordinate thereof wherein B is a full-width at half maximum with respect to each peak position 2θ (10 to 90°) is in the range of 3.0×10−4 to 20.0×10−4; and Li1+xMn2−y−zNiyMzO4 Chemical Formula (1) wherein x, y, z fall within the range of −0.05≤x≤0.15, 0.4≤y≤0.6 and 0≤z≤0.20, respectively; and M is at least one element selected from the group consisting of Mg, Al, Si, Ca, Ti, Co, Zn, Sb, Ba, W and Bi.
摘要:
The present invention provides a precursor of positive electrode active substance particles for non-aqueous electrolyte secondary batteries which have a high discharge voltage and a high discharge capacity, hardly suffer from side reactions with an electrolyte solution, and are excellent in cycle characteristics, positive electrode active substance particles for non-aqueous electrolyte secondary batteries, and processes for producing these particles, and a non-aqueous electrolyte secondary battery. The present invention relates to positive electrode active substance particles for non-aqueous electrolyte secondary batteries having a spinel structure with a composition represented by the following chemical formula (1), in which the positive electrode active substance particles satisfy the following characteristic (A) and/or characteristic (B) when indexed with Fd−3m in X-ray diffraction thereof: (A) when indexed with Fd−3m in X-ray diffraction of the positive electrode active substance particles, a ratio of I(311) to I(111) [I(311)/I(111)] is in the range of 35 to 43%, and/or (B) when indexed with Fd−3m in X-ray diffraction of the positive electrode active substance particles, a gradient of a straight line determined by a least square method in a graph prepared by plotting sine in an abscissa thereof and B cos θ in an ordinate thereof wherein B is a full-width at half maximum with respect to each peak position 2θ (10 to 90°) is in the range of 3.0×10−4 to 20.0×10−4; and Li1+xMn2−y−zNiyMzO4 Chemical Formula (1) wherein x, y, z fall within the range of −0.05≦x≦0.15, 0.4≦y≦0.6 and 0≦z≦0.20, respectively; and M is at least one element selected from the group consisting of Mg, Al, Si, Ca, Ti, Co, Zn, Sb, Ba, W and Bi.
摘要:
The present invention relates to positive electrode active substance particles for lithium ion batteries, comprising lithium manganate particles comprising Li and Mn as main components and having a cubic spinel structure (Fd-3m), wherein primary particles of the positive electrode active substance have a dodecahedral or higher-polyhedral shape in which none of crystal planes equivalent to the (111) plane are located adjacent to each other, and flat crystal planes are crossed with each other to form a clear ridge, and an average primary particle diameter of the primary particles is not less than 1 μm and not more than 20 μm. The positive electrode active substance particles according to the present invention are excellent in packing property, load characteristics and high-temperature stability.
摘要:
According to the present invention, there is provided a process for producing lithium manganate particles having a high output and an excellent high-temperature stability. The present invention relates to a process for producing lithium manganate particles comprising the steps of mixing a lithium compound, a manganese compound and a boron compound with each other; and calcining the resulting mixture in a temperature range of 800 to 1050° C., wherein an average particle diameter (D50) of the boron compound is not more than 15 times an average particle diameter (D50) of the manganese compound, and wherein the lithium manganate particles have a composition represented by the following chemical formula: Li1+xMn2-x-yY1yO4+B in which Y1 is at least one element selected from the group consisting of Ni, Co, Mg, Fe, Al, Cr and Ti, and x and y satisfy the conditions of 0.03≦x≦0.15 and 0≦y≦0.20, respectively.
摘要:
According to the present invention, there is provided a process for producing lithium manganate particles having a high output and an excellent high-temperature stability. The present invention relates to a process for producing lithium manganate particles comprising the steps of mixing a lithium compound, a manganese compound and a boron compound with each other; and calcining the resulting mixture in a temperature range of 800 to 1050° C., wherein an average particle diameter (D50) of the boron compound is not more than 15 times an average particle diameter (D50) of the manganese compound, and wherein the lithium manganate particles have a composition represented by the following chemical formula: Li1+xMn2-x-yY1yO4+B in which Y1 is at least one element selected from the group consisting of Ni, Co, Mg, Fe, Al, Cr and Ti, and x and y satisfy the conditions of 0.03≦x≦0.15 and 0≦y≦0.20, respectively.
摘要:
The present invention relates to positive electrode active substance particles for lithium ion batteries, comprising lithium manganate particles comprising Li and Mn as main components and having a cubic spinel structure (Fd-3m), wherein primary particles of the positive electrode active substance have a dodecahedral or higher-polyhedral shape in which none of crystal planes equivalent to the (111) plane are located adjacent to each other, and flat crystal planes are crossed with each other to form a clear ridge, and an average primary particle diameter of the primary particles is not less than 1 μm and not more than 20 μm. The positive electrode active substance particles according to the present invention are excellent in packing property, load characteristics and high-temperature stability.
摘要:
The present invention provides lithium manganate which has a high output and is excellent in high-temperature stability. The present invention relates to lithium manganate particles which are produced by mixing a lithium compound, a manganese compound, a Y compound and an A compound with each other and then calcining the resulting mixture, and have a composition represented by the following chemical formula 1 and an average secondary particle diameter (D50) of 1 to 15 μm, Li1+xMn2−x−yYyO4+zA (Chemical Formula) in which Y is at least one element selected from the group consisting of Al and Mg; A is a sintering aid element having a melting point of not higher than 850° C.; x and y satisfy 0.03≦x≦0.15 and 0≦y≦0.20, respectively; z is in the range of 0 to 2.5 mol % based on Mn, wherein the lithium manganate particles have a sulfur content of not more than 100 ppm.
摘要:
An engine cover device for light vehicles including a cover main body for use in covering a driven wheel and a power unit from the outsides thereof, a first partition wall for separating the driven wheel and the power unit, and a second partition wall for separating a muffler and other associated equipment units for the engine such as an air cleaner, a carburetor and the like. The second partition wall is arranged such that a space for the installation of the muffler is formed at a rear part of an air discharge port of a forced air cooling device for the engine, and the front part of the cover main body is projected outwardly as it is extended from its front end toward its rear part so as to provide for formation of an air communication hole at the side surface of the cover.The engine cover device is useful for protecting the associated equipment units for the engine against mud, water, and dust, and also protecting other peripheral units of the engine from high temperatures generated by the muffler, the engine cover device being suitable for cooling an interior of the cover and in particular for providing an efficient cooling of the muffler.The engine cover device is provided with a resilient member for biasing a split-type cover member constituting a part of the cover main body toward an engaged position with its supporting member and thereby a positive holding of the split-type cover member may be made when it is to be assembled.
摘要:
In a system comprising a central control device and operation devices, wherein connectors are connected to operation device and control, video, and audio signals can be exchanged among the operation devices through multiline cables connected to the connectors or as multiplexed signals, a particular operation device connected to a connector can be identified by detecting the connector inputting a control signal transmitted by the particular operation device and information on pairs, each comprising a connector and operation device connected to the connector, is cataloged in a selector control table stored in a RAM unit embedded in a control means of a central control device. Accordingly, the operation devices can be connected to each other with ease.
摘要:
Dielectric ceramic and process of producing the same. A dielectric ceramic essentially consisting of a compound having a disordered perovskite-type complex crystal structure and having a composition represented by the general formula (I):Ba.sub.x A.sub.y B.sub.1-x-y O.sub.W (I)wherein A represents at least one element selected from the group consisting of Zn, Ni, Co and Mg, and the Mg content in the A is not more than 0.44y; B is at least one element selected from the group consisting of Ta and Nb; x and y are a number of 0.49.ltoreq.x.ltoreq.0.52 and 0.15.ltoreq.y.ltoreq.0.19, respectively. This dielectric ceramic has good dielectric properties, which are markedly small in variation, and can be produced by a process which is easy in control.