Abstract: An impurity processing device is a device for processing metal impurities contained in a solid-liquid mixture for forming an electrode of an electric storage device, and includes a first electrode and a second electrode that apply an electric field to the solid-liquid mixture, and a power supply that causes a current of 0.1 mA or more to flow between the first electrode and the second electrode.

Abstract: An impurity processing device includes: a pipe through which a treated liquid containing metal impurities flows; a first electrode and a second electrode disposed in the pipe; and a power supply causing a current to flow between the first electrode and the second electrode.

Abstract: A cathode active material for magnesium secondary batteries includes a material containing magnesium, boron, and carbon. The material has a layered structure.

Abstract: A cathode active material for magnesium secondary batteries contains a composite oxide represented by the formula MgxMyO2, where M is at least one selected from the group consisting of Ni, Co, Mn, Ti, V, Cr, Fe, Cu, and Mo; 1.0<x, and y<1.0.

Abstract: The non-aqueous electrolyte liquid for a magnesium secondary battery according to one aspect of the present disclosure contains a non-aqueous solvent, a magnesium salt, and an aromatic heterocyclic compound which has an aliphatic hydrocarbon group which is a substituent. The aromatic heterocyclic compound includes at least one selected from the group consisting of a nitrogen atom, an oxygen atom, a phosphorus atom, and a sulfur atom as a constituent atom of the ring thereof. The aromatic heterocyclic compound is a non-electrolyte.

Abstract: A cathode active material for magnesium secondary batteries includes a material containing magnesium, boron, and carbon. The material has a layered structure.

Abstract: A nonaqueous electrolyte liquid for an alkaline earth metal secondary battery includes: a nonaqueous solvent: an alkaline earth metal cation; an organic molecule coordinated to the alkaline earth metal cation; and an anion. The organic molecule is a carbonic acid ester, a carboxylic acid ester, a phosphoric acid ester, or a sulfonic acid ester.

Abstract: A cathode active material for magnesium secondary batteries contains a composite oxide represented by the formula MgxMyO2, where M is at least one selected from the group consisting of Ni, Co, Mn, Ti, V, Cr, Fe, Cu, and Mo; 1.0<x, and y<1.0.

Abstract: An all-solid-state lithium-ion secondary battery includes a cathode active material, an anode active material, a solid electrolyte between the cathode and anode active materials, and an intermediate layer between the solid electrolyte and the cathode active material. The cathode and anode active materials are able to store and release a lithium ion. The solid electrolyte has lithium ion conductivity. The intermediate layer is constituted of elements including all elements constituting the cathode active material. A lithium ion in the intermediate layer is less ionic than that in the cathode active material.

Abstract: An all-solid-state lithium-ion secondary battery includes a cathode active material, an anode active material, a solid electrolyte between the cathode and anode active materials, and an intermediate layer between the solid electrolyte and the cathode active material. The cathode and anode active materials are able to store and release a lithium ion. The solid electrolyte has lithium ion conductivity. The intermediate layer is constituted of elements including all elements constituting the cathode active material. A lithium ion in the intermediate layer is less ionic than that in the cathode active material.

Abstract: An active material, for a lithium ion secondary battery, capable of suppressing deposition of lithium metal is provided. The active material for a lithium ion secondary battery has a composition represented by LiZnP(x)V(1-x)O4 (O<x<1) and having a redox potential that is higher than 0 V and lower than or equal to 1.5 V on a lithium metal basis.

Abstract: An active material of a lithium ion secondary battery includes a composition represented by W(x)Me1(z1)Me2(z2) . . . Men(zn)O2 (where x+z1+z2+ . . . +zn=1, n is an integer of 1 or more, and 0<max{z1, z2, . . . , zn}/x<1/2) or W(x)Mo(z1)Ti(z2)O2 (x+z1+z2=1, 0<z1?x, and 0<z2?0.1304), in which Me1 to Men each represent an element that can take a rutile-type structure or a MoO2-type structure as an oxide.

Abstract: Disclosed is an electrochemical capacitor which comprises an element, an electrolyte, and an outer case that houses the element and the electrolyte. The element comprises: a negative electrode that is obtained by forming a negative electrode layer on the surface of a collector, the negative electrode layer containing a carbon material in which lithium ions are absorbed; a positive electrode that is obtained by forming a positive electrode layer on the surface of a collector, the positive electrode layer absorbing ions; and a separator that is interposed between the negative electrode and the positive electrode. The electrolyte contains lithium ions. A coating film that contains lithium carbonate is formed on the surface of the carbon material that is contained in the negative electrode layer.

Abstract: Disclosed is an electrochemical capacitor which comprises an element, an electrolyte, and an outer case that houses the element and the electrolyte. The element comprises: a negative electrode that is obtained by forming a negative electrode layer on the surface of a collector, the negative electrode layer containing a carbon material in which lithium ions are absorbed; a positive electrode that is obtained by forming a positive electrode layer on the surface of a collector, the positive electrode layer absorbing ions; and a separator that is interposed between the negative electrode and the positive electrode. The electrolyte contains lithium ions. A coating film that contains lithium carbonate is formed on the surface of the carbon material that is contained in the negative electrode layer.

Abstract: An electrode in sheet form includes a current collector and an electrode mixture layer carried on each side thereof. The electrode is bent in the longitudinal direction thereof, to cause a large number of cracks in at least the electrode mixture layer to be positioned on the inner side of the current collector when wound, such that the cracks extend from the surface of the electrode mixture layer to the current collector in the direction intersecting with the longitudinal direction of the electrode. This bending process includes the steps of: bending the electrode at a curvature that is smaller than that of the winding core at least once; and thereafter bending the electrode at a curvature that is equal to or larger than that of the winding core. For example, this process is performed by arranging rollers such that their diameters decrease gradually and pressing the electrode against these rollers. This invention provides an electrode that does not break when wound to form an electrode assembly.

Abstract: An electrode in sheet form includes a current collector and an electrode mixture layer carried on each side thereof. The electrode is bent in the longitudinal direction thereof, to cause a large number of cracks in at least the electrode mixture layer to be positioned on the inner side of the current collector when wound, such that the cracks extend from the surface of the electrode mixture layer to the current collector in the direction intersecting with the longitudinal direction of the electrode. This bending process includes the steps of: bending the electrode at a curvature that is smaller than that of the winding core at least once; and thereafter bending the electrode at a curvature that is equal to or larger than that of the winding core. For example, this process is performed by arranging rollers such that their diameters decrease gradually and pressing the electrode against these rollers. This invention provides an electrode that does not break when wound to form an electrode assembly.

Abstract: A method for testing a precursor of a secondary cell with high reliability and high efficiency to judge the precursor to be acceptable or defective. The current flowing when a test voltage is applied between a pair of electrodes is measured before an electrolyte is placed between the electrodes. If a current the current value of which exceeds a predetermined reference current value (13) is detected during the time from the start of application of a voltage to a normal secondary cell precursor until the current becomes constant, the precursor is determined to be defective.

Abstract: An electrode in sheet form includes a current collector and an electrode mixture layer carried on each side thereof. The electrode is bent in the longitudinal direction thereof, to cause a large number of cracks in at least the electrode mixture layer to be positioned on the inner side of the current collector when wound, such that the cracks extend from the surface of the electrode mixture layer to the current collector in the direction intersecting with the longitudinal direction of the electrode. This bending process includes the steps of: bending the electrode at a curvature that is smaller than that of the winding core at least once; and thereafter bending the electrode at a curvature that is equal to or larger than that of the winding core. For example, this process is performed by arranging rollers such that their diameters decrease gradually and pressing the electrode against these rollers. This invention provides an electrode that does not break when wound to form an electrode assembly.

Abstract: A method for testing a precursor of a secondary cell with high reliability and high efficiency to judge the precursor to be acceptable or defective. The current flowing when a test voltage is applied between a pair of electrodes is measured before an electrolyte is placed between the electrodes. If a current the current value of which exceeds a predetermined reference current value (13) is detected during the time from the start of application of a voltage to a normal secondary cell precursor until the current becomes constant, the precursor is determined to be defective.

Abstract: An electrode for a PTC thermistor of the present invention includes a base layer having electrical conductivity and a sintered layer formed on the base layer. The sintered layer is formed by sintering a conductive powder and has electrical conductivity, and has roughness on a surface thereof. Thus, the present invention can provide an electrode for a PTC thermistor that has a large adhesion to the conductive polymer and can be produced easily.