A sodium nickel chloride battery for high-performance batteries of electric vehicles and other demanding stationary applications. The battery which permits a current collector with a maximum surface-to-cross-section ratio and simple manufacture thereof as well as simplified electrode filling of the battery includes a cathode-side metallic current collector elongated in a cathode chamber about a central axis that is made of a metal tube with high electrical conductivity and has, in a part of the current collector immersed in a separator, a formed tube section, provided with elements for increasing the surface area of the current collector, and has, at a transition from an unpressed tube section as a filler tube to a pressed tube section, a through-hole opening the filler tube to the outside, so that the filler tube can be used as a filling opening for the porous mixture of the cathode and the secondary electrolyte.

A method of manufacturing an electrode for a secondary battery includes preparing an electrode current collector in which a plurality of through-holes are formed; applying a first slurry including an electrode active material, a binder, and a conductive material to at least one surface of the electrode current collector; and applying a second slurry including an electrode active material, a binder, and a conductive material on the first slurry. In manufacturing an electrode including an electrode current collector with a plurality of through-holes, processability may be secured by preventing leakage of a slurry, and thus, a uniform electrode mixture layer may be formed.

Provided is a technique for capturing transition metal ions, such as cobalt ions, in a secondary battery that elute from a positive electrode active material and for preventing deposition of transition metal at a negative electrode. A composition for a lithium ion secondary battery porous membrane that contains non-conductive particles and a binding material is provided. The binding material includes a polymer A including an aliphatic conjugated diene monomer unit in a proportion of greater than 85 mass % and a polymer B including a (meth)acrylic acid ester monomer unit in a proportion of at least 60 mass %. A mass basis ratio of content of the polymer A relative to content of the polymer B is at least 0.2 and no greater than 9.0.

Electrochemical device using thin micro-porous metal sheets. The porous metal sheet may have a thickness less than 200 μm, provides three-dimensional networked pore structures of pore sizes in the range of 2.0 nm to 5.0 μm, and is electrically conductive. The micro-porous metal sheet is used for positively and/or negatively-charged electrodes by providing large specific contact surface area of reactants/electron. Nano-sized catalyst or features can be added inside pores of the porous metal sheet of pore sizes at sub- and micrometer scale to enhance the reaction activity and capacity. Micro-porous ceramic materials may be coated on the porous metal sheet at a thickness of less than 40 μm to enhance the functionality of the porous metal sheet and may function as a membrane separator. The electrochemical device may be used for decomposing molecules and for synthesis of molecules such as synthesis of ammonia from water and nitrogen molecules.

To prevent the breakage of a bonding portion when current collector tabs are converged and bonded, and thereby maintain a current path. A plurality of electrode current collectors each including a metal porous body, a plurality of tabs each extending from an end of the metal porous body of each of the electrode current collectors, and a connecting tab lead that electrically connects the tabs, are included. The connecting tab lead is cross-bonded with each of the tabs to form a first compression bonding portion, and is further folded from a first of the tabs to a second of the tabs, for example, the connecting tab lead is arranged in a bellows shape. At a tab convergence location where the first compression bonding portions are stacked, the tabs are converged by forming a second compression bonding portion by ultrasonic waves or other means.

To provide a current collecting structure capable of reliably collecting current while maintaining a pressurized and constrained state of a coin-type all-solid-state battery. A coin-type all-solid-state battery includes a solid electrolyte layer; a pair of first electrode current collectors each including a metal porous body, the first electrode current collectors being respectively disposed on both sides of the solid electrolyte layer; a pair of second electrode current collectors each including a metal porous body, the second electrode current collectors being respectively disposed on outer sides of the first electrode current collectors; and a pair of lid members being respectively disposed on outer sides of the pair of second electrode current collectors.

To provide a solid-state battery capable of achieving high capacity. A solid-state battery including a multilayer body including a stack of a plurality of electrode layers including positive electrode layers and negative electrode layers and solid electrolyte layers each disposed between the electrode layers, the multilayer body having a columnar shape; and the solid-state battery including a positive electrode terminal and a negative electrode terminal disposed at both end portions of the multilayer body; a positive electrode tab electrically connected to the positive electrode layer and the positive electrode terminal; and a negative electrode tab electrically connected to the negative electrode layer and the negative electrode terminal, wherein the positive electrode tab and the negative electrode tab are spirally wound on an outer peripheral surface of the multilayer body.

An electrically conductive holder is provided that is suitable for receiving a tablet electrode of a button battery. The holder includes a bottom portion to be fitted coaxially within terminal of a button battery. The holder further includes an upstanding wall portion. The bottom portion is flat and provided with a plurality of apertures through the complete thickness of the bottom portion. At least one group of apertures is distributed at regular angular intervals around the center of the bottom portion, spanning 360°. The strips of solid material of the bottom portion between two adjacent apertures are preferable narrow compared to the dimensions of the adjacent apertures so as to provide a mechanical support for the tablet electrode while also being able to deform under the influence of a volumetric expansion of the electrode.

Provided are an electrode for lithium ion secondary batteries which can prevent cracking of the electrode, and a lithium ion secondary battery made using the same. An electrode (1, 2) for a lithium ion secondary battery (100) includes a collector (10, 20) of a metal porous body having a predetermined thickness, and having a corner of at least one location in a stereoscopic view; and an electrode mixture (18, 28) filled into these pores. The collector has a mixture filled region (11, 21) in which the electrode mixture is filled, and a mixture non-filled region (15, 25) in which the electrode mixture is not filled, or a high modulus filler having smaller elastic modulus than the electrode mixture is filled, existing at a corner of the collector.

To provide a solid-state battery in which the capacity and voltage can be optionally adjusted in a single battery and the installation space for the battery can be reduced. A solid-state battery includes a plurality of electrode layers, and a solid electrolyte layer disposed between the electrode layers. The electrode layers includes positive electrode portion formed by filling a current collector including a metal porous body with a positive electrode material mixture, negative electrode portion formed by filling a current collector including a metal porous body with a negative electrode material mixture, and an isolation portion formed between the positive electrode portion and the negative electrode portion. Between the plurality of electrode layers disposed adjacent to each other, the positive electrode portion and the negative electrode portion are disposed so as to face each other, and the isolation portions are disposed so as to face each other.