Abstract: This positive electrode active material for a non-aqueous electrolyte secondary battery contains a lithium transition metal composite oxide represented by the composition formula LixMnyNizAlaMbO2-cFc (in the formula, M represents at least two elements selected from Ti, Co, Si, Sr, Nb, W, Mo, P, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Ge, Zr, Ru, K, and Bi; 1.0<x?1.2; 0.4?y?0.8; 0?z?0.4; 0<a<0.01; 0<b<0.03; 0<c<0.1; and x+y+z+a+b?2).

Abstract: A positive electrode active material for a secondary battery includes a lithium metal composite oxide having a crystal structure assignable to a space group Fm-3m. The lithium metal composite oxide includes at least Li and Mn. The lithium metal composite oxide has a crystallite size of 1 nm to 100 nm or less.

Abstract: A positive electrode active material for secondary batteries contains a lithium-metal composite oxide having a rock salt type crystal structure assignable to the space group Fm-3m. The lithium-metal composite oxide contains at least Li and Mn and has a D50 of 0.05 ?m or more and 10 ?m or less in a volume-based cumulative particle size distribution of the lithium-metal composite oxide. A secondary battery includes the positive electrode active material in a positive electrode.

Abstract: A negative electrode for a secondary battery according to one aspect of the present disclosure is characterized by comprising a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and is characterized in that: the negative electrode mixture layer contains a negative electrode active material including a carbon material and a Si-based material; a pore diameter distribution of the negative electrode mixture layer as measured by a mercury press-in method has two peak values R1 and R2; the peak value R1 is in the range of 0.5-1.5 ?m; the peak value R2 is in the range of 2-10 ?m; an average particle diameter of the Si-based material is 4 ?m or more; and the contained amount of the Si-based material with respect to the total amount of the negative electrode active material is 30 mass % or more.

Abstract: This positive-electrode active material for a non-aqueous electrolyte secondary battery contains a lithium and transition metal composite oxide represented by the composition formula: LixMnyNixGeaMbO2-cFc (where, M is at least one elements selected from Ti, Co, Si, Al, Nb, W, Mo, P, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Sr, Zr, Ru, K, and Bi; 1.0<x?1.2; 0.4?y?0.8; 0?z?0.4; 0<a<0.01; 0<b<0.03; 0<c<0.1; and x+y+z+a+b?2).

Abstract: A positive electrode active material for secondary batteries includes a lithium metal composite oxide having a crystal structure assignable to space group Fm-3m. The lithium metal composite oxide contains Li, a first cationic element M1, and a second cationic element M2. Mn accounts for 50 at % or more of the first cationic element M1. The content of the second cationic element in the lithium metal composite oxide is 10 to 1000 ppm in terms of mass. The number mLi of atoms of Li and the number mM1 of atoms of the first cationic element each contained in the lithium metal composite oxide satisfy 1.2?mLi/mM1?2.0. The crystallite size of the lithium metal composite oxide is in the range of 1 nm to 1000 nm.

Abstract: A positive electrode active material for secondary batteries includes a lithium metal composite oxide having a crystal structure that can be attributed to the space group Fm-3m. The lithium metal composite oxide contains at least Li, Mn, Ti, and M. The M is a positive element different from Li, Mn, and Ti. The crystallite size of the lithium metal composite oxide is in a range of 1 nm to 100 nm, or in an X-ray diffraction (XRD) profile using CuK? radiation of the lithium metal composite oxide, the half-value width of a diffraction peak attributed to the (200) plane is in a range of 0.10 to 1.8°, based on 2?.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to one embodiment comprises a lithium transition metal composite oxide represented by the compositional formula Li?Na?Ni1-b-cMnbXcOd (where X is at least one element selected from metallic elements other than Li, Na, Ni, and Mn, 0.80???1.20, 0???0.05, 0.80??+??1.20, 0.25<b?0.65, 0?c?0.1, 0.4?1?b?c<0.75, and d is a value satisfying the valence), and the ratio I108/I110 of the integrated intensity I108 of the diffraction peak at the (108) plane to the integrated intensity I110 of the diffraction peak at the (110) plane of the x-ray diffraction pattern obtained by powder x-ray diffraction of the lithium transition metal composite oxide is I108/I110<0.4.

Abstract: The disclosed method is a method for measuring the internal resistance of a battery. The measurement method includes a conduction step of charging or discharging the battery, a measurement step of measuring an open circuit voltage of the battery at the end time of the charging or discharging and thereafter, and a calculation step of individually calculating at least one resistance component included in the internal resistance, based on a voltage change of the open circuit voltage measured in the measurement step and a current value of current flowing through the battery for the charging or discharging at the end time. In the calculation step, the at least one resistance component is calculated based on a slope of a line obtained by plotting the voltage change in a graph in which a horizontal axis indicates a square root of an elapsed time from the end time and a vertical axis indicates the open circuit voltage.

Abstract: This positive electrode active material for a non-aqueous electrolyte secondary battery contains a lithium-transition metal composite oxide that has a rock salt-related structure and is represented by the compositional formula LiaMnbMcO2?XFx (in the formula: M is at least one metal element excluding Li and Mn; 2.000<a+b+c?2.195; 1.0<a?1.4; 0.4?b?0.9; 0?c?0.2; and 0.2?x?0.6). The metal element M preferably is at least one selected from Ni, Sn, Mo, Ti, W, Zn, and Al.

Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries contains a lithium transition metal composite oxide that is represented by composition formula LixMnyNizPaMbO2-cFc(wherein M represents at least one element that is selected from among Ti, Co, Si, Sr, Nb, W, Mo, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Ge, Zr, Ru, K and Bi; 1.0<x?1.2; 0.4?y?0.8; 0?z?0.4; 0<a<0.01; 0<b<0.05; 0<c<0.1; and (x+y+z+a+b)?2).

Abstract: This charging method is A method for charging a nonaqueous electrolyte secondary cell containing a lithium-rich positive-electrode active material. When constant-current charging is performed to a predetermined voltage V2 which is equal to or higher than a setting voltage V1, and then constant-current discharging is performed to a predetermined voltage V3, V3<V1?V2 is satisfied. Cell capacity C1 at V1, cell capacity C2 at V2, and cell capacity C3 at V3 satisfy 0.99C1?C3<C2.

Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is characterized by being a composite oxide which is represented by general formula LixTMtmNMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m. In the general formula, TM represents a transition metal; M represents a non-transition metal; x, tm, y and f satisfy 1.75?x+tm+y?2 and 0<f?0.7; and if Q=2×tm×(1?(1?f/2)5), 0.8?Q?1.5 is satisfied.

Abstract: A positive electrode active material includes a first lithium composite oxide and a second lithium composite oxide that covers at least a part of the surface of the first lithium composite oxide. The first lithium composite oxide includes at least one selected from the group consisting of F, Cl, N, and S. The first lithium composite oxide has a crystal structure belonging to a layered structure. The second lithium composite oxide has a crystal structure belonging to space group Fd-3m. The positive electrode active material has an integrated intensity ratio I(18°-20°)/I(43°-46°) of greater than or equal to 0.05 and less than or equal to 0.90.

Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a composite oxide which is represented by general formula LixTMtmMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m; and in the general formula, TM represents a transition metal, M represents a non-transition metal, and if Q=2×tm×(1?(1?f/2)5), Q?1 is satisfied. With respect to a dV/dq-SOC curve showing the relationship between the state of charge SOC and dV/dq of a half cell that contains this composite oxide, the dV/dq-SOC curve being obtained by charging the half cell with a charging current of 0.1 C at 25° C. to an end voltage within the range of 4.7 V to 4.95 V, there is one or more peaks within the SOC range from 40% to 70%.

Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is a composite oxide which is represented by general formula LixTMtmMyO2-fFf and has a crystal structure that belongs to the space group Fm-3m; and in the general formula, TM represents a transition metal, M represents a non-transition metal, and if Q=2×tm×(1?(1?f/2)5), Q<1 is satisfied. With respect to a dV/dq-SOC curve showing the relationship between the state of charge SOC and dV/dq of a half cell that contains this composite oxide, the dV/dq-SOC curve being obtained by charging the half cell with a charging current of 0.1 C at 25° C. to an end voltage within the range of 4.7 V to 4.95 V, there is one or more peaks within the SOC range from 10% to 40%.

Abstract: A solid electrolyte according to the present disclosure has a composition represented by MgxZry(POz)2 (0<x?3.5, 0?y<1.5, and 3?z?4.25), and includes an amorphous part. The composition may be represented by Mgx(POz)2 (3?x?3.5 and 3?z?4.25). The composition may be represented by MgxZry(POz)2 (0<x<3.5, 0<y<1.5, and 3?z?4.25).

Abstract: Disclosed is a negative electrode active material for a secondary battery containing: a composite material that has a silicide phase and a silicon phase, wherein the silicide phase contains an intermetallic compound of a silicon element and a metal element Me other than the silicon element, the metal element Me includes N kinds or more constituent elements Mi, where i=1 to N, and 5?N, and a condition represented by the following expression is satisfied: 1.5<??Ci·lnCi, where Ci represents a mole fraction of each of the N kinds or more constituent elements Mi.

Abstract: Provided are: a secondary battery electrode in which elution of a metal component is suppressed; and a secondary battery using this electrode. This secondary battery comprises a positive electrode and a negative electrode. At least the positive electrode or the negative electrode includes a collector, and a composite layer disposed on a surface of the collector. The composite layer includes an electrode active material containing an elemental metal, a compound having a terminal CN group, an electroconductive material, a water-insoluble additive, and a water-soluble additive. The water-insoluble additive contains a polysaccharide.

Abstract: A positive electrode with a positive electrode mixture layer provided on a surface of a positive electrode current collector, which includes a first layer contacting the positive electrode current collector and a second layer contacting the first layer. The first layer includes first active material particles with a particle diameter L. The second layer includes active material particles with a particle diameter R. Third positive electrode active material particles with a particle diameter r are included at least at an interface between the first and the second layers, wherein R>L>r. The first active material particles include a lithium transition metal composite oxide with a ratio of Co in metal element atoms other than Li of 2 atom % or more. The second and third active material particles including a different lithium transition metal composite oxide than the first active material particles.