Abstract: A layered solid-state battery that includes a first unit cell, a second unit cell, and an internal collection layer that is disposed to intervene between the first unit cell and the second unit cell. Each of the unit cells is constituted of a positive electrode layer, a solid electrolyte layer, and a negative electrode layer that are sequentially stacked. The internal collection layer is disposed to be in contact with each of the negative electrode layers of the unit cells. Also, the internal collection layer contains an electron conductive material and an ion-conductively electrically conductive specific conductive material.

Abstract: A layered solid-state battery that includes a first unit cell, a second unit cell, and an internal collection layer that is disposed to intervene between the unit cells. Each of the unit cells includes a positive electrode layer, a solid electrolyte layer, and a negative electrode layer that are sequentially stacked. The internal collection layer has one side surface that is in contact with the positive electrode layer of the first unit cell and the other side surface that is in contact with the negative electrode layer of the second unit cell. Also, the internal collection layer contains an electron conductive material and an ion-conductively insulating specific conductive material.

Abstract: Provided is an all solid state battery which has the same level of discharge capacity as in the case of using an electrolyte solution, and is able to improve the cycle stability. An all solid state battery includes a solid electrolyte layer, as well as a positive electrode layer and a negative electrode layer provided in positions opposed to each other with the solid electrolyte layer interposed therebetween. At least one of the positive electrode layer and the negative electrode layer is bonded to the solid electrolyte layer by firing. The negative electrode layer contains an electrode active material composed of a metal oxide containing no lithium, and a solid electrolyte containing no titanium.

Abstract: A method of producing a total solid battery by stacking a molded body of each of a positive electrode material, a solid electrolyte material, a negative electrode material, and a collector material and firing the stacked body. The firing step includes a first firing step of firing the stacked body in an inert atmosphere and, after the first firing step, a second firing step of firing the stacked body in an atmosphere containing oxygen.

Abstract: An all solid state secondary battery configured with the use of a NASICON-type compound for a solid electrolyte and a lithium-containing manganese oxide for a positive electrode active material. The all solid state secondary battery includes a positive electrode layer and a solid electrolyte layer, in which a positive electrode active material constituting the positive electrode layer contains a compound represented by the general formula LixMyMnzO4, wherein 1?x?1.33, 0?y?0.5, and 1.67?y?z?2?y, and M is at least one element selected from the group consisting of Ni, Co, Al, and Cr, and a solid electrolyte constituting the solid electrolyte layer contains a compound represented by the general formula Li1+wAlwGe2?w(PO4)3, wherein 0?w?1.

Abstract: A solid battery that includes a positive electrode layer, a negative electrode layer, and a solid electrolyte layer. The positive electrode layer and the negative electrode layer include an electrode active material. The solid electrolyte layer includes a solid electrolyte. A LiZr2(PO4)3-containing layer is provided between the solid electrolyte layer and at least one of the positive electrode layer and the negative electrode layer.

Abstract: An intercellular separation structure body capable of electrically connecting a plurality of unit cells that include a laminate type solid secondary battery with each other, and capable of ion-conductively insulating a positive electrode layer and a negative electrode layer in two adjacent unit cells, as well as a laminate type solid secondary battery provided with the same. The intercellular separation structure body is an intercellular separation structure body disposed between a plurality of unit cells each of which includes a positive electrode layer, a solid electrolyte layer, and a negative electrode layer that are sequentially stacked in a laminate type solid secondary battery. This intercellular separation structure body includes an insulating layer that electroconductively and ion-conductively insulates the plurality of unit cells from each other and an electroconductive section that is formed within the insulating layer and electrically connects the plurality of unit cells with each other.

Abstract: A solid secondary battery that includes a positive electrode layer, a solid electrolyte layer including an oxide-based solid electrolyte, and a negative electrode layer. At least one of the positive electrode layer and the negative electrode layer, and the solid electrolyte layer are joined by sintering. At least one of the positive electrode layer and the negative electrode layer includes an electrode active material, and a conductive agent containing a carbon material, and the conductive agent includes a carbon material which has a specific surface area of 1000 m2/g or less.

Abstract: A method for producing an electrode active material for a secondary battery, which contains a lithium containing phosphate compound with a olivine-type framework represented by LiMPO4 (wherein, M is one or more elements selected from the group consisting of Mn, Fe, Co, Cu, Ni, and Mg), and in the method, a mixed powder of starting raw materials for the electrode active material for a secondary battery is subjected to firing at a first temperature, and then to grinding, and further subjected to firing at a second temperature higher than the first temperature. The first firing step includes a step of heating the mixed powder of the raw materials until a volatile component is removed almost completely.

Abstract: A method of fabricating a flat type electrochemical device, which is constructed by placing in a case comprising first and second case half bodies a separator and first and second functional substances for an electrochemical device so arranged as to interpose the separator. Peripheral portions of the first and second case half bodies are overlapped with each other, the peripheral portions are welded by a welding process during the application of pressure whereby the peripheral portions are joined with substantially no gaps. The portions welded by the welding process with pressure are then further welded using a laser beam welding.