Abstract: A lithium ion secondary battery includes a negative electrode including a mixture layer which contains a niobium titanium oxide as a negative electrode active material, and non-aqueous electrolyte containing lithium alkoxysulfonate represented by RSOOO?Li+ (where R is at least one selected from the group consisting of OCH3 and OC2H5).

Abstract: Provided is a novel negative electrode for nonaqueous electrolyte secondary batteries, which is capable of improving cycle characteristics and is also capable of suppressing aggregation of active material particles in a slurry. The negative electrode active material for nonaqueous electrolyte secondary batteries contains silicon and has a D50 of 0.1 ?m to 5 ?m, and an amount of water measured at 120° C. to 300° C. by the Karl-Fischer method (referred to as “amount of water”) per specific surface area (referred to as “CS”), that is, the amount of water/CS, of 0.1 to 80 ppm/(m2/cc).

Abstract: Proposed is a novel negative electrode for nonaqueous electrolyte secondary batteries in which the battery capacity does not decrease even when charging and discharging are repeated. Proposed is a silicon-containing negative electrode active material for nonaqueous electrolyte secondary batteries, comprising negative electrode active material particles which are provided with a surface layer containing carbon and titanium or aluminum on the entirety or a portion of the surface of the active material.

Abstract: Provided is a lithium secondary battery using a positive electrode active material which operates at a charging voltage in a region exceeding 4.3 V, and a novel positive electrode active material for a lithium secondary battery which can further enhance the output characteristics. Proposed is a positive electrode active material for a lithium secondary battery including positive electrode active material particles obtained by equipping the entire surface or a part of the surface of lithium manganese-containing composite oxide particles (also referred to as the “core particles”) operating at a charging voltage in a region exceeding 4.3 V in a metal Li reference potential with a layer A containing at least Ti, Al, Zr, or two or more kinds of these, and C.

Abstract: Provided is a novel positive electrode active material which can effectively suppress the quantity of gas generated by the reaction with an electrolytic solution. Proposed is a positive electrode active material for a lithium secondary battery including positive electrode active material particles obtained by equipping the entire surface or a part of a surface of lithium manganese-containing composite oxide particles (also referred to as the “core particles”) operating at a charging voltage in a region exceeding 4.3 V in a metal Li reference potential with a layer A containing at least titanium (Ti), aluminum (Al), zirconium (Zr), or two or more kinds of these.

Abstract: Provided is a novel method of preparing a negative electrode for nonaqueous electrolyte secondary batteries, which contains silicon and is capable of improving cycle characteristics and is also capable of suppressing aggregation of active material particles in a slurry. After formation of a molten liquid by any one of methods (i) to described in the specification, the molten liquid is micronized by atomization or liquid quenching, thereby forming a micronized active material in the form of powder, and the micronized active material is pulverized and classified in a nitrogen atmosphere in which air is present in an amount of less than 1%, and the balance is composed of nitrogen, to thereby adjust the particle size of the micronized active material.

Abstract: To provide a positive electrode for nonaqueous secondary batteries having improved charge/discharge cycle characteristics, the positive electrode contains in its active material layer a compound represented by formula: LizNi1-x-yTix(MpLiq)yO2 wherein x is a positive number less than 0.3; y is a positive number less than 0.25; z is a number from 0.95 to 1.05; M is a polyvalent metal satisfying the relation: prM+qrL=54 to 69 pm (where rM is the ionic radius of M, and rL is the ionic radius of Li+); p is a positive number; q is 0 or greater; p and q satisfy the relations: p+q=1 and pv+q=3; and v is the valence of the metal M. When analyzed by XRD, the compound shows diffraction peaks assigned to the planes (003) and (104). The ratio of the area of the peak of the (003) plane to that of the (104) plane is 0.5 to 0.75.

Abstract: Provided is a new 5 V class spinel exhibiting an operating potential of 4.5 V or more (5 V class), which can suppress the amount of gas generation during high temperature cycles. Suggested is a manganese spinel-type lithium transition metal oxide represented by formula: Li[NiyMn2-(a+b)-y-zLiaTibMz]O4 (wherein 0?z?0.3, 0.3?y<0.6, and M=at least one or more metal elements selected from the group consisting of Al, Mg, Fe and Co), in which in the above formula, the following relationships are satisfied: a>0, b>0, and 3?b/a?8.

Abstract: In order to propose a new negative electrode for nonaqueous electrolyte secondary batteries having excellent dispersibility even with a negative electrode active material having a relatively small particle size, there is proposed a negative electrode active material for nonaqueous electrolyte secondary batteries, the negative electrode active material containing silicon and having negative electrode active material particles that have a D50 based on a volume-based particle size distribution obtainable by measurement by a laser diffraction scattering type particle size distribution analysis method, of 0.1 ?m to 5.0 ?m, and include a surface layer containing oxygen, silicon and carbon on the entire surface or a portion of the active material surface.

Abstract: Provided is a lithium-manganese-type solid solution positive electrode material capable of effectively suppressing gas generation in an initial cycle. Proposed is a lithium-manganese-type solid solution positive electrode material that includes a monoclinic structure of C2/m in a hexagonal structure of a space group R-3m. The lithium-manganese-type solid solution positive electrode material contains a solid solution expressed by a composition formula: xLi4/3Mn2/3O2+(1?x)LiMn?Co?Ni?O2 (in the formula, 0.2???0.6, 0???0.4, and 0.2???0.6). In the composition formula, x is equal to or more than 0.36 and less than 0.50.

Abstract: Provided is a novel spinel-type lithium-manganese composite oxide, allowing gas generation amount to be limited for a gas generated via a reaction with an electrolytic solution. Proposed is a spinel-type lithium-manganese composite oxide, wherein, when the spinel-type lithium-manganese composite oxide is placed in an ion-exchanged water at 20° C., stirred for 10 minutes, then, left to stand undisturbed for 2 minutes, separated into a supernatant and a precipitate and recovered, with respect to the “16d-site-to-32e-site inter-atomic distance (100%)” of the spinel-type lithium-manganese composite oxide contained in the precipitate measured by the Rietveld method using the fundamental method, proportionally, the “16d-site-to-32e-site inter-atomic distance” of the spinel-type lithium-manganese composite oxide contained in the supernatant is less than 101.5%.

Abstract: Provided is a novel positive electrode active material which can effectively suppress the quantity of gas generated by the reaction with an electrolytic solution. Proposed is a positive electrode active material for a lithium secondary battery including positive electrode active material particles obtained by equipping the entire surface or a part of a surface of lithium manganese-containing composite oxide particles (also referred to as the “core particles”) operating at a charging voltage in a region exceeding 4.3 V in a metal Li reference potential with a layer A containing at least titanium (Ti), aluminum (Al), zirconium (Zr), or two or more kinds of these.

Abstract: Provided is a lithium secondary battery using a positive electrode active material which operates at a charging voltage in a region exceeding 4.3 V, and a novel positive electrode active material for a lithium secondary battery which can further enhance the output characteristics. Proposed is a positive electrode active material for a lithium secondary battery including positive electrode active material particles obtained by equipping the entire surface or a part of the surface of lithium manganese-containing composite oxide particles (also referred to as the “core particles”) operating at a charging voltage in a region exceeding 4.3 V in a metal Li reference potential with a layer A containing at least Ti, Al, Zr, or two or more kinds of these, and C.

Abstract: Provided is a new 5 V class spinel exhibiting an operating potential of 4.5 V or higher (5 V class) with respect to the Li metal reference potential, having an excellent discharge capacity retention ratio at high temperatures, for example 45° C. Suggested is a spinel type lithium-manganese-nickel-containing composite oxide containing a crystalline phase in which a portion of Mn sites in LiMn2O4-? are substituted with Li; another metal element M1, wherein M1 represents a metal element including at least one of Ni, Co and Fe and another metal element M2, wherein M2 represents a metal element including at least one of Mg, Ti, Al, Ba, Cr and Nb, and the spinel type lithium-manganese-nickel-containing composite oxide comprising a composite oxide phase containing Ni, Mn and B.

Abstract: Provided is a novel spinel-type lithium-manganese composite oxide, allowing gas generation amount to be limited for a gas generated via a reaction with an electrolytic solution. Proposed is a spinel-type lithium-manganese composite oxide, wherein, when the spinel-type lithium-manganese composite oxide is placed in an ion-exchanged water at 20° C., stirred for 10 minutes, then, left to stand undisturbed for 2 minutes, separated into a supernatant and a precipitate and recovered, with respect to the “16d-site-to-32e-site inter-atomic distance (100%)” of the spinel-type lithium-manganese composite oxide contained in the precipitate measured by the Rietveld method using the fundamental method, proportionally, the “16d-site-to-32e-site inter-atomic distance” of the spinel-type lithium-manganese composite oxide contained in the supernatant is less than 101.5%.

Abstract: Proposed is a novel negative electrode for nonaqueous electrolyte secondary batteries in which the battery capacity does not decrease even when charging and discharging are repeated. Proposed is a silicon-containing negative electrode active material for nonaqueous electrolyte secondary batteries, comprising negative electrode active material particles which are provided with a surface layer containing carbon and titanium or aluminum on the entirety or a portion of the surface of the active material.

Abstract: Provided is a new 5 V class spinel exhibiting an operating potential of 4.5 V or more (5 V class), which can suppress the amount of gas generation during high temperature cycles. Suggested is a manganese spinel-type lithium transition metal oxide represented by formula: Li[NiyMn2-(a+b)-y-zLiaTibMz]O4 (wherein 0?z?0.3, 0.3?y<0.6, and M=at least one or more metal elements selected from the group consisting of Al, Mg, Fe and Co), in which in the above formula, the following relationships are satisfied: a>0, b>0, and 2?b/a?8.

Abstract: In order to propose a new negative electrode for nonaqueous electrolyte secondary batteries having excellent dispersibility even with a negative electrode active material having a relatively small particle size, there is proposed a negative electrode active material for nonaqueous electrolyte secondary batteries, the negative electrode active material containing silicon and having negative electrode active material particles that have a D50 based on a volume-based particle size distribution obtainable by measurement by a laser diffraction scattering type particle size distribution analysis method, of 0.1 ?m to 5.0 ?m, and include a surface layer containing oxygen, silicon and carbon on the entire surface or a portion of the active material surface.

Abstract: Provided is a novel negative electrode for nonaqueous electrolyte secondary batteries, which is capable of improving cycle characteristics and is also capable of suppressing aggregation of active material particles in a slurry. The negative electrode active material for nonaqueous electrolyte secondary batteries, which contains silicon and has a D50 of 0.1 ?m to 5 ?m, and the amount of water measured at 120° C. to 300° C. by the Karl-Fischer method (referred to as “amount of water”) per specific surface area (referred to as “CS”), that is, the amount of water/CS, of 0.1 to 80 ppm/(m2/cc).

Abstract: Provided is a new 5 V class spinel exhibiting an operating potential of 4.5 V or higher (5 V class) with respect to the Li metal reference potential, having an excellent discharge capacity retention ratio at high temperatures (for example, 45° C.). Suggested is a spinel type lithium-manganese-nickel-containing composite oxide containing a crystalline phase in which a portion of Mn sites in LiMn2O4-? are substituted with Li; another metal element M1 including Ni (here, the M1 represents a metal element including at least one of Ni, Co and Fe), and another metal element M2 (here, the M2 represents a metal element including at least one of Mg, Ti, Al, Ba, Cr and Nb), and the spinel type lithium-manganese-nickel-containing composite oxide comprising a composite oxide phase containing Ni, Mn and B.