Abstract: Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein a BET specific surface area of the anode active material particles is 1.9 m2/g or more and 14.2 m2/g or less.

Abstract: Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein, for the anode active material particles, a value A obtained by the following formula (1) is 6.1 or more and 54.8 or less: A=SBET×dmed×D??Formula (1) where SBET is a BET specific surface area (m2/g) of the anode active material particles; dmed is a median diameter D50 (?m) of the anode active material particles; and D is a density (g/cm3) of the anode active material particles.

Abstract: An all-solid-state battery system comprising an all-solid-state battery comprising a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer, and a control device configured to control a charge-discharge voltage during use of the all-solid-state battery. The negative electrode active material layer includes alloy negative electrode active material particles. The amorphization degree of the alloy negative electrode active material particles is in the range of 27.8% to 82.8% and a ratio Z/W is in the range of 0.32 to 0.60, where Z is a controlled discharge capacity of the all-solid-state battery, and W is a theoretical capacity of the alloy negative electrode active material particles×a total weight of the alloy negative electrode active material particles×the amorphization degree.

Abstract: An all-solid-state battery system comprising an all-solid-state battery comprising a positive electrode active material layer, a solid electrolyte layer, and a negative electrode active material layer, and a control device configured to control a charge-discharge voltage during use of the all-solid-state battery. The negative electrode active material layer includes alloy negative electrode active material particles. The amorphization degree of the alloy negative electrode active material particles is in the range of 27.8% to 82.8% and a ratio Z/W is in the range of 0.32 to 0.60, where Z is a controlled discharge capacity of the all-solid-state battery, and W is a theoretical capacity of the alloy negative electrode active material particles×a total weight of the alloy negative electrode active material particles×the amorphization degree.

Abstract: A main object of the present disclosure is to provide a stacked battery in which the unevenness of short circuit resistance among a plurality of cells is suppressed.

Abstract: A main object of the present disclosure is to provide a stacked battery in which sneak current caused by an unevenness of a short circuit resistance among a plurality of cells, is suppressed.

Abstract: A main object of the present disclosure is to provide a stacked battery in which an unevenness of short circuit resistance among a plurality of cells is suppressed. The present disclosure achieves the object by providing a stacked battery comprising: a plurality of cells in a thickness direction, wherein the plurality of cells are electrically connected in parallel; each of the plurality of cells includes a cathode current collector, a cathode active material layer, a solid electrolyte layer, an anode active material layer, and an anode current collector, in this order; the stacked battery includes a surface-side cell that is located on a surface side of the stacked battery, and a center-side cell that is located on a center side rather than the surface-side cell; and a contact resistance between the cathode current collector and the anode current collector in the surface-side cell is more than a contact resistance between the cathode current collector and the anode current collector in the center-side cell.

Abstract: A main object of the present disclosure is to provide a stacked battery in which an unevenness of short circuit resistance among a plurality of cells is suppressed.

Abstract: Disclosed is a stacked battery that can flow a larger rounding current in a short-circuit current shunt part than in an electric element when a short circuit occurs in the short-circuit current shunt part and the electric element in nailing, the stacked battery in which an electrical resistance of a current collector tab of the short-circuit current shunt part is smaller than an electrical resistance of a current collector tab of the electric element.

Abstract: Disclosed is an anode mixture configured to provide an all-solid-state lithium ion secondary battery being excellent in cycle characteristics when it is used in the battery, an anode including the anode mixture, and an all-solid-state lithium ion secondary battery including the anode. The anode mixture may be an anode mixture for an all-solid-state lithium ion secondary battery, wherein the anode mixture contains an anode active material, a solid electrolyte and an electroconductive material; and wherein a value obtained by multiplying, by a bulk density of the solid electrolyte, a volume percentage (%) of the electroconductive material when a volume of the anode mixture is determined as 100 volume %, is 0.53 or more and 3.0 or less.

Abstract: Disclosed is a method for producing an all-solid-state lithium ion secondary battery being excellent in cycle characteristics.

Abstract: Disclosed is a method for producing an all-solid-state lithium ion secondary battery being excellent in cycle characteristics. The production method may be a method for producing an all-solid-state lithium ion secondary battery, wherein the method comprises: an anode mixture forming step of obtaining an anode mixture by drying a raw material for an anode mixture, which contains an anode active material, a solid electrolyte and an electroconductive material; and wherein, a value obtained by dividing a volume percentage (%) of the electroconductive material when the volume of the anode mixture is determined as 100 volume %, by a voidage V (%) of the inside of the anode mixture calculated by the following formula (1), is 2.3 or more and 16.

Abstract: Provided are an anode mixture configured to provide excellent cycle characteristics when used in an all-solid-state lithium ion secondary battery, an anode containing the anode mixture, and an all-solid-state lithium ion secondary battery containing the anode. Disclosed is an anode mixture for an all-solid-state lithium ion secondary battery, wherein the anode mixture contains an anode active material, a solid electrolyte and an electroconductive material; wherein the anode active material contains at least one active material selected from the group consisting of a metal that is able to form an alloy with Li and an oxide of the metal; and wherein a value obtained by dividing, by a BET specific surface area (m2/g) of the solid electrolyte, a volume percentage (%) of the electroconductive material when a volume of the anode mixture is determined as 100 volume %, is 0.09 or more and 1.61 or less.

Abstract: In an all-solid-state battery including at least one short-circuit current shunt part and at least one electric element which are stacked, when the battery is constrained, cracking etc. of the adhesive in the short-circuit current shunt pail is prevented.

Abstract: Disclosed is an all-solid-state battery that makes it possible for a larger rounding current flow into a short-circuit current shunt part than to each electric element when the short-circuit current shunt part and the electric elements short-circuit in nail penetration testing.

Abstract: Disclosed is a stacked battery including at least one short-circuit current shunt part and electric elements, wherein: the shunt part includes first and second current collector layers, and an insulating layer provided between the first and second current collector layers, all of these layers being stacked; each power generation element includes a cathode current collector layer, a cathode material layer, an electrolyte layer, an anode material layer, and an anode current collector layer all of these layers being stacked; the first current collector layer is electrically connected to the cathode current collector layer and the second current collector layer to the anode current collector layer; the electric elements are electrically connected in parallel; and the shunt part next to the electric elements includes a PPTC layer between the first current collector layer and the insulating layer and/or between the second current collector layer and the insulating layer.

Abstract: A short-circuit current shunt part does not cause any short circuit during normal battery use, causes stable short circuits in nail penetration, and suppresses sudden temperature rise after nail penetration. A stacked battery includes at least one short-circuit current shunt part including first and second current collector layers, and an insulating layer between the first and second current collector layers, and electric elements each including a cathode current collector layer, a cathode material layer, an electrolyte layer, an anode material layer, and an anode current collector layer, with all layers being stacked. The first current collector layer is electrically connected with the cathode current collector layer, the second current collector layer is electrically connected with the anode current collector layer, the electric elements are electrically connected to each other in parallel, and the short-circuit current shunt part insulating layer formed of a thermosetting resin sheet.

Abstract: A method of producing an all-solid battery includes pressing a laminate in a state where the laminate is insulated from a press machine. The laminate includes a negative electrode current collector layer, a negative electrode active material layer, a solid electrolyte layer, and a positive electrode active material layer. The negative electrode current collector layer includes copper, at least one of the negative electrode active material layer and the solid electrolyte layer includes a sulfide solid electrolyte, and the press machine is an anisotropic press machine.

Abstract: An all-solid battery that includes a negative electrode layer, a positive electrode layer, a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer, a negative electrode current collector connected to the negative electrode layer, and a positive electrode current collector connected to the positive electrode layer, wherein the negative electrode layer contains a sulfide solid electrolyte, the negative electrode current collector contains a metal that reacts with the sulfide solid electrolyte, a sulfur compound layer that contains a sulfur compound generated by a reaction of the sulfide solid electrolyte and the metal is present between the negative electrode layer and the negative electrode current collector, charge capacity when constant current charge was conducted up to 3.6 V at 0.3 C or more and 3.6 C or less in an initial charge after preparation of the all-solid battery is 50 mAh/g or more and 90 mAh/g or less.

Abstract: A main object of the present disclosure is to provide an all solid lithium battery with excellent capacity durability. The above object is achieved by providing an anode layer to be used in an all solid lithium battery, the anode layer comprising: a metal particle capable of being alloyed with Li, as an active material; and the metal particle has two kinds or more of crystal orientation in one particle.