The present invention provides a resin-attached fiber characterized by: including conductive fibers having an average fiber diameter of 10-5000 nm and an average aspect ratio of 30 or greater, and a thermoplastic resin that is integrated with the conductive fibers contacting the surface of at least a portion of the conductive fibers; and the powder volume resistivity of the resin-attached fiber being 10 Ω.Math.cm or less when the density is 0.8 g/cm.sup.3.

Provided herein are nanoparticle nanowire networks; nano devices comprising the same, composite nano devices, and methods of manufacturing and using the nanoparticle nanowire networks, nano devices, and composite nano devices.

An active cathode material is doped with silver to effectively improve the cathode's electrical conductivity. The active material may be sulfur, and the silver may be in the form of silver, silver sulfide, or both. If desired, the cathode material includes a matrix of conductive nano-particles which include elemental sulfur, silver and or silver sulfide. The present disclosure may be applicable to other battery materials as well, such as, for example, lithium iron phosphate.

An electrochemical cell is provided, which includes a cathode comprising a three dimensional (3D) porous cathode structure, an anode, an electrolyte separator, comprised of a ceramic material, located between the cathode and the anode, and a cathode current collector, wherein the cathode is located between the cathode current collector and the electrolyte separator. The 3D porous cathode structure includes ionically conducting electrolyte strands extending through the cathode from the cathode current collector to the electrolyte separator, pores extending through the cathode from the cathode current collector to the electrolyte separator, and an electronically conducting network extending on sidewall surfaces of the pores from the cathode current collector to the electrolyte separator.

An electrochemical cell that cycles lithium ions includes a positive electrode, a negative electrode current collector spaced apart from the positive electrode, and an ionically conductive electrolyte disposed between the positive electrode and the negative electrode current collector. The negative electrode current collector is of unitary one-piece construction and has a three-dimensional porous structure that defines an interconnected network of open pores. During charging of the electrochemical cell, lithium metal is deposited within the open pores of the negative electrode current collector.

The present disclosure relates to an electrode for a battery including a porous support and a conductive coating layer formed on at least one surface of the porous support. The electrode may be a negative electrode or a positive electrode, preferably a negative electrode. The electrode is applicable to both an all-solid-state battery and a lithium secondary battery.

The present invention relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a current collector, a positive active material layer and a safety coating disposed between the current collector and the positive active material layer, wherein the safety coating comprises a polymer matrix, a conductive material and an inorganic filler, wherein the polymer matrix comprises at least two types of polymer materials, and the first type of polymer material is fluorinated polyolefin and/or chlorinated polyolefin, and the solubility of the second type of polymer material in oil solvent is smaller than the solubility of the first type of polymer material; and the weight percentage of the first type of polymer material relative to the total weight of the polymer matrix, the conductive material and the inorganic filler is 17.5% or more. The positive electrode plate improves high temperature safety of electrochemical device.

In various examples, an anode, which may be for a metal ion-conducting electrochemical device, comprises a metal member; and a metal conducting coating, which may be an epitaxial (e.g., a homoepitaxial) metal conducing coating, disposed on at least a portion of the metal member (e.g., all portions of the metal member that would be or are in contact with the electrolyte of the metal ion-conducting electrochemical device). A metal conducting coating or an anode may be formed by electrodeposition in the presence of a field.

A nonaqueous electrolyte secondary battery including a positive electrode that includes a lithium-manganese oxide as a positive electrode active material, a negative electrode includes SiO.sub.x (0≤X<2) in which at least a part of a surface is covered with carbon, or a Li-Al alloy as the negative electrode active material, a low-viscosity electrolytic solution that contains propylene carbonate (PC), ethylene carbonate (EC), and dimethoxy ethane (DME) as an organic solvent in a range of {PC:EC:DME}={0.5 to 1.5:0.5 to 1.5:1 to 31} in terms of a volume ratio, and lithium bis(fluorosulfonyl)imide (LiFSI) as a supporting salt in an individual amount of 0.6 to 1.2 (mol/L), and the viscosity of the electrolytic solution is constant at higher than −30° C. to room temperature.

A method of producing metallic sodium powders. The method includes immersing one or more solid pieces of sodium metal in an organic liquid containing a hydrocarbon oil. The solid piece (s) of sodium metal immersed in the hydrocarbon oil is (are) then subjected to ultrasonic irradiation, wherein the solid piece of sodium metal is fragmented to form sodium powder, resulting in a dispersion of the sodium powder in the organic liquid. The dispersed sodium powder is then separated from the organic liquid, resulting in metallic sodium powder. A method of presodiation of an anode in an electrochemical cell. The method includes adding sodium metal powders to the surface of the anode either as a dry powder or as a suspension of the sodium particles in an organic liquid. An anode in an electrochemical cell containing metallic sodium particles. An electrochemical cell comprising a presodiated anode.