A method of manufacturing a lithium secondary battery, which includes coating a slurry for forming a porous coating layer on a porous polymer substrate and drying the porous coating layer under a humidified condition to form a preliminary separator; forming an electrode assembly, wherein the preliminary separator is interposed between a positive electrode and a negative electrode, placing the electrode assembly into a battery case and injecting an electrolytic solution into the battery case; and thermally treating the electrode assembly. A lithium secondary battery manufactured by the method is also provided. Accordingly, the separator has significantly improved ionic conductivity compared to separators commonly used in the art.

A method of manufacturing a lithium secondary battery, which includes coating a slurry for forming a porous coating layer on a porous polymer substrate and drying the porous coating layer under a humidified condition to form a preliminary separator; forming an electrode assembly, wherein the preliminary separator is interposed between a positive electrode and a negative electrode, placing the electrode assembly into a battery case and injecting an electrolytic solution into the battery case; and thermally treating the electrode assembly. A lithium secondary battery manufactured by the method is also provided. Accordingly, the separator has significantly improved ionic conductivity compared to separators commonly used in the art.

A separator in which at least one surface of a porous base is coated with a coating layer including partially-reduced graphene oxide and a lithium ion conducting polymer, and thereby capable of resolving problems caused by lithium polysulfide occurring in a lithium secondary battery, and a lithium secondary battery including the same.

A rechargeable lithium battery includes an electrode laminate including a positive electrode including a positive current collector and a positive active material layer disposed on the positive current collector; a negative electrode including a negative current collector, a negative active material layer disposed on the negative current collector, and a negative electrode functional layer disposed on the negative active material layer; and a separator, wherein the electrode laminate has a ratio (L/W) of a height (L), which is a length in a protruding direction of an electrode terminal, relative to a width (W), which is perpendicular to the protruding direction of the electrode terminal and parallel to the laminate surface, is about 1.1 to about 2.3, the positive active material layer includes a first positive active material including at least one of a composite oxide of a metal selected from cobalt, manganese, nickel, and a combination thereof and lithium and a second positive active material including a compound represented by Chemical Formula 1, the negative electrode functional layer includes flake-shaped polyethylene particles, and an operation voltage is greater than or equal to about 4.3 V.
Li.sub.aFe.sub.1-x1M.sub.x1PO.sub.4  [Chemical Formula 1] In Chemical Formula 1, 0.90≤a≤1.8, 0≤x1≤0.7, and M is Mn, Co, Ni, or a combination thereof.

A flexible Zn film electrode with ionic and electronic networks has been designed by utilizing ionic liquid based gel polymer as the binder, which can minimize the interface resistance between electrode and electrolytes. Ionic liquid electrolytes are good candidates for high surface area Zn anode due to their good electro(chemical) stability. Ionic liquid based gel polymer electrolytes (GPEs) are good candidates to replace liquid electrolytes or separators in some special applications, like surface coating structure batteries.

A flame retardant separator for secondary batteries, and more particularly, a flame retardant separator for secondary batteries comprising or coated with a metal hydroxide having a low Gibbs free energy among polymorphs of a metal hydroxide used as an inorganic flame retardant.

The present application relates to an electrochemical device. The electrochemical device includes: at least one electrode, the at least one electrode having a first surface; and a fiber coating layer, the fiber coating layer including a fiber and being disposed on the first surface. The electrochemical device has the advantages of high energy density, strong liquid retention ability, good drop resistance, good chemical stability and the like since its fiber coating layer has small thickness, high porosity and stronger interfacial adhesion to the electrode.

A separator for a rechargeable battery includes a porous substrate and a heat resistance layer on at least one surface of the porous substrate. The heat resistance layer includes an acryl-based copolymer, an alkali metal, and a filler. The acryl-based copolymer includes a unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing unit, and a sulfonate group-containing unit.

Systems and methods are provided for configuring cell performance using specific anode, cathode, and separator combinations. Separators with significant adhesive properties may be used in forming rechargeable cells, such as lithium-ion cells. The separator with significant adhesive properties may include an adhesive coating, applied on one or both sides of the separator, and/or adhesive material is dissolved or deposited within the separator. The separators with significant adhesive properties may also include one or more ceramic layers.

A printed energy storage device includes a first electrode including zinc, a second electrode including manganese dioxide, and a separator between the first electrode and the second electrode, the first electrode, second, electrode, and separator printed onto a substrate. The device may include a first current collector and/or a second current collector printed onto the substrate. The energy storage device may include a printed intermediate layer between the separator and the first electrode. The first electrode, and the second electrode may include 1-ethyl-3-methylimidazolium tetrafluoroborate (C.sub.2mimBF.sub.4). The first electrode and the second electrode may include an electrolyte having zinc tetrafluoroborate (ZnBF.sub.4) and 1-ethyl-3-methylimidazolium tetrafluoroborate (C.sub.2mimBF.sub.4). The first electrode, the second electrode, the first current collector, and/or the second current collector can include carbon nanotubes. The separator may include solid microspheres.