Abstract: Disclosed is a cathode active material having a core-shell structure. The core-shell cathode active material includes a core including a lithium transition metal oxide with excellent electrochemical properties and a shell formed by coating the surface of the core with a transition metal oxide. The formation of the shell by coating a transition metal oxide on the surface of the core comprising a lithium transition metal oxide prevents the structure of the lithium transition metal oxide from collapsing and inhibits the dissolution of manganese ions, enabling the fabrication of a hybrid capacitor with improved energy density and rate characteristics. Also disclosed is a method for producing the cathode active material.

Abstract: A method of manufacturing crystalline titanium dioxide (TiO2) powder, a method of a negative active material, and a negative active material and a rechargeable lithium battery including the crystalline titanium dioxide (TiO2) powder are provided. The method of manufacturing the crystalline titanium dioxide powder may include: preparing a titanyl chloride (TiOCl2) aqueous solution by adding titanium tetrachloride (TiCl4) to water at a temperature ranging from 0° C. to 10° C.; adding alcohol, urea, and a sphere-shaping agent to the titanyl chloride aqueous solution to prepare a mixture; and hydrothermally synthesizing the mixture under a pressure ranging from 1.5 atm to 5 atm at a temperature ranging from 80° C. to 155° C.

Abstract: The present invention relates to a lithium-air battery, and more particularly, to a lithium-air battery which comprises a gas diffusion-type positive electrode formed in a portion thereof contacting air, and which employs a low-volatility electrolyte, thus exhibiting the effect of preventing volatilization of the electrolyte, thereby enabling the battery to be used over a long period of time without safety problems and without degradation of the charging/discharging characteristics of the battery, and the effect of air flowing into the battery being provided in a quicker and more uniform manner while passing through the gas diffusion-type positive electrode, thus improving the performance of the battery.

Abstract: The present invention relates to a method for manufacturing a carbon-sulfur composite, a carbon-sulfur composite manufactured by the method, and a lithium-sulfur battery including the same. In the carbon-sulfur composite manufactured by the method for manufacturing the carbon-sulfur composite, the sulfur is filled up to inside of the carbon balls, and thereby uniformly distributed. Accordingly, the sulfur content is increased, resulting to increase of capacity property, and also electrode structure does not collapse even though the sulfur is changed to a liquid phase while charging or discharging the battery, resulting to showing stable cycle property.

Abstract: Provided is a separator for a rechargeable lithium battery including a porous support including a polymer derived from polyamic acid or a polymer derived from polyimide, wherein the polyamic acid and the polyimide include a repeating unit prepared from aromatic diamine including at least one ortho-positioned functional group relative to an amine group and dianhydride.

Abstract: Disclosed is a lithium air battery that includes a positive electrode including a current collector and a positive active material layer disposed on the current collector and including a positive active material, a negative electrode including a negative active material, and an electrolyte, wherein the positive active material includes lithium peroxide (Li2O2), lithium oxide (Li2O), lithium hydroxide (LiOH), or a combination thereof, and the negative active material includes a lithium metal alloy, a material being capable of doping and dedoping lithium, a transition element oxide, or a combination thereof.

Abstract: A method of manufacturing crystalline titanium dioxide (TiO2) powder, a method of a negative active material, and a negative active material and a rechargeable lithium battery including the crystalline titanium dioxide (TiO2) powder are provided. The method of manufacturing the crystalline titanium dioxide powder may include: preparing a titanyl chloride (TiOCl2) aqueous solution by adding titanium tetrachloride (TiCl4) to water at a temperature ranging from 0° C. to 10° C.; adding alcohol, urea, and a sphere-shaping agent to the titanyl chloride aqueous solution to prepare a mixture; and hydrothermally synthesizing the mixture under a pressure ranging from 1.5 atm to 5 atm at a temperature ranging from 80° C. to 155° C.