A molten sodium-based battery comprises a robust, highly Na-ion conductive, zero-crossover separator and a fully inorganic, fully liquid, highly cyclable molten cathode that operates at low temperatures.

Provided is a bi-polar electrode for a battery, wherein the bi-polar electrode comprises: (a) a current collector comprising a conductive material foil (e.g. metal foil) having a thickness from 10 nm to 100 μm and two opposed, parallel primary surfaces, wherein one or both of the primary surfaces is coated with a layer of graphene material having a thickness from 10 nm to 10 μm; and (b) a negative electrode layer and a positive electrode layer respectively disposed on the two sides of the current collector, each in physical contact with the layer of graphene material or directly with a primary surface of the conductive material foil (if not coated with a graphene material layer). Also provided is a battery comprising multiple (e.g. 2-300) bipolar electrodes internally connected in series. There can be multiple bi-polar electrodes that are connected in parallel.

Provided are a metal foil, a metal foil manufacturing method and a method for manufacturing an electrode using the same, in which the adhesion between the metal foil and a conductive resin layer and the coating performance of the conductive resin layer can be improved by treating the surface of the metal foil. The metal foil comprises: a metal base substrate; a surface treatment layer formed on at least one surface of the metal base substrate by treating the surface of the metal base substrate; and a conductive resin layer applied to the surface of the surface treatment layer, wherein the surface treatment layer has a surface energy of 34-46 dyne/cm.

Disclosed is an electrode for secondary batteries including an electrode mixture including an electrode active material, binder and conductive material coated on a current collector wherein a conductive material is coated to a thickness of 1 to 80 μm on the current collector and the electrode mixture is coated on a coating layer of the conductive material so as to improve electrical conductivity.

Current collector, an electrode structure, a non-aqueous electrolyte battery, and an electrical storage device having superior shut down function are provided. According to the present invention, a current collector having a resin layer on at least one side of a conductive substrate is provided. Here, thermoplastic resin particles substantially free of a conductive agent are dispersed in a thermosetting resin base material containing the conductive agent to structure the resin layer; a value of mass ratio given by (thermoplastic resin particles)/(conductive agent) is 0.3 to 1.5; and a value given by (average thickness of conductive agent)/(average thickness of thermoplastic resin particles) is 0.3 to 4.0.

A negative electrode sheet and a manufacturing method thereof and a battery are provided in the disclosure. The negative electrode sheet includes a conductive fiber cloth, a support layer, and an active material layer. The conductive fiber cloth serves as a current collector of the negative electrode sheet. The support layer is formed on a surface of the conductive fiber cloth and includes multiple protruding units, where each of the multiple protruding units includes multiple needle-shaped protrusions, and the multiple needle-shaped protrusions of each protruding unit are arranged radially. The active material layer includes multiple active portions, where each of the multiple active portions is formed on a surface of one of the multiple needle-shaped protrusions, and different active portions are formed on surfaces of different needle-shaped protrusions.

A lithium-sulfur battery includes a casing having a length and a width, the casing including at least an anode and a cathode wound into a jelly roll oriented parallel to the length of the casing, an electrolyte disposed in the lithium-sulfur battery, a negative terminal extending along the length of the casing, and a positive terminal extending along the length of the casing, the positive terminal and the negative terminal parallel to one another.

A structure for radiofrequency applications includes: a semiconducting supporting substrate, and a trapping layer arranged on the supporting substrate. The trapping layer includes a higher defect density than a predetermined defect density. The predetermined defect density is the defect density beyond which the electric resistivity of the trapping layer is no lower 10,000 ohm.Math.cm over a temperature range extending from −20° C. to 120° C.

A positive current collector, a positive electrode plate, a secondary battery, and an apparatus, the positive current collector comprising a support layer, provided with two opposing surfaces in the thickness direction thereof, and a conductive layer arranged on at least one of the two surfaces of the support layer, wherein the conductive layer has a thickness Di satisfying 300 nm≤D.sub.1≤2 μm; and when the positive current collector has a the tensile strain of 1.5%, the conductive layer has a sheet resistance growth rate of T≤30%. The positive current collector has higher safety performance and meanwhile higher electrical performance, and thus a positive electrode plate and a secondary battery adopting the positive current collector could have higher safety performance and meanwhile higher electro-chemical performance.

An electrochemical device, including a cathode, an anode and an electrolyte. The cathode includes a cathode current collector and a cathode mixture layer formed on the cathode current collector. A dyne value of the cathode current collector is 25 dyn/cm to 31 dyn/cm. Burrs are provided on an edge of the cathode mixture layer, and a length of the burrs is not greater than 4 mm. The electrochemical device has improved cycle performance.