A main object of the present disclosure is to provide an all solid state battery wherein interface resistance between a current collector and an active material layer is low. In the present disclosure, the above object is achieved by providing an all solid state battery comprising: an electrode including a current collector, an electron conductive layer, and an active material layer, in this order, and a solid electrolyte layer formed on the active material layer side of the electrode, and the electron conductive layer is an agglutinate of metal particles or a metal foil, and electron conductivity of the electron conductive layer is 1×10.sup.3 S/cm or more at 25° C.

A disclosed film electrode includes an electrode base, and an active material layer formed on the electrode base, and a resin layer adhering to at least one of a peripheral portion of the active material layer and a surface of the active material layer in a direction extending along a plane of the electrode base.

Provided are sulfide solid electrolyte particles which have sufficient ion conductivity and which are configured to suppress hydrogen sulfide generation, and an all-solid-state battery comprising the sulfide solid electrolyte particles. Disclosed are sulfide solid electrolyte particles comprising Li, P, S and a halogen as constituent elements and having a Li/P molar ratio of more than 3, wherein an oxygen/sulfur element ratio of a particle surface measured by XPS is 0.29 or more and 0.81 and less, and an oxygen/sulfur element ratio at a depth of 30 nm (in terms of a SiO.sub.2 sputter rate) from the particle surface measured by XPS, is 0.29 or less.

Positive plate, electrochemical device including same, and apparatus thereof are disclosed. The positive plate includes a current collector and an electrode active material layer arranged on at least one surface of the current collector, the current collector includes a support layer and a conductive layer arranged on at least one surface of the support layer, a single-sided thickness D2 of the conductive layer satisfies: 30 nm≤D2≤3 μm. A material of the conductive layer is aluminum or aluminum alloy, and a density of the conductive layer is 2.5 g/cm.sup.3-2.8 g/cm.sup.3. The electrode active material layer includes an electrode active material, a binder, and a conductive agent, and the binder has an uneven distribution in a thickness direction of the electrode active material layer.

Disclosed are a positive electrode plate and a battery including the positive electrode plate. The positive electrode plate includes a positive electrode current collector, at least one thermosensitive coating layer, at least one composite fusion layer, and at least one positive electrode active material layer. The thermosensitive coating layer has electrical conductivity at room temperature, and has advantages of increasing a contact area between the active material and the current collector, effectively reducing battery polarization, and the like. When a temperature of the positive electrode plate during use reaches a thermosensitive temperature and higher, thermosensitive polymer microspheres melt to form at least one continuous electron blocking layer, therefore forming a current blockage, and an internal blockage is formed inside the battery, thereby preventing further thermal runaway of a secondary battery, and improving safety performance of the secondary battery.

The present disclosure relates to a multilayer electrode and a method of manufacturing the same, and more specifically to a multilayer electrode comprising an electrode collector; and two or more electrode active material layers which are sequentially coated on one surface or both surfaces of the electrode current collector, wherein the electrode active material layers each include a carbon-based material, a binder, and a silicon-based material, wherein in the mutually adjacent electrode active material layers based on the direction of formation of the electrode active material layers, the content of the carbon-based material and the content of the binder in the electrode active material layer located relatively close to the electrode collector are larger than the content of the carbon-based material and the content of the binder in the electrode active material layers located relatively far away from the electrode current collector.

A composite particle for an electrochemical device contains an electrode active material, a conductive material, a binder, and 0.1 parts by mass or more and 5 parts by mass or less of a thermally decomposable foaming agent per 100 parts by mass of the composite particle. When a cross section of the composite particle perpendicular to the long axis of the composite particle, and including the midpoint of the long axis is subjected to a map analysis using an electron beam microanalyzer, the value of the ratio of the integrated values of the detection intensities of carbon atoms contained outside and inside the range of the circle the center of which is coincides with the midpoint of the long axis and the diameter of which is one half of the length of the long axis is 4 or more and 15 or less.

The present invention is directed to a method of coating an electrical current collector comprising treating a portion of a surface of the electrical current collector with an adhesion promoting composition to deposit a treatment layer over the portion of the surface of the electrical current collector, wherein the resulting surface of the electrical current collector comprises (a) a treated portion comprising the treatment layer and (b) a non-treated portion that lacks the treatment layer; electrodepositing an electrodeposited coating layer from an electrodepositable coating composition onto the surface of the electrical current collector to form a coated electrical current collector; and rinsing the coated electrical current collector, wherein the electrodeposited coating layer substantially adheres to the treated portion of the surface and does not adhere to the non-treated portion of the surface. Also disclosed are electrodes and electrical storage devices.

A negative electrode material for a lithium ion battery, the material comprising: particles comprising a core, with the core containing silicon, the particles having one or more coating layers disposed around the core, at least one of the coating layers comprising a porous semi-conducting metal oxide.

This electrode for batteries is provided with: a core material; and a mixture layer which contains an active material and a binder, while being arranged on the surface of the core material. If the mixture layer is trisected in the thickness direction and the divided sections are defined as the first region, the second region and the third region sequentially from the core material side, the void fraction of the second region is higher than the void fraction of the first region.