Abstract: A lithium secondary battery, and more particularly, to a lithium secondary battery having improved performance by minimizing the content of impurities such as sodium in the battery.

Abstract: A slurry composition, and a positive electrode and a lithium secondary battery including the same are provided. The slurry composition includes a positive electrode active material, an electrically conductive material, a binder, a thickener comprising a lithiated carboxymethyl cellulose, an additive comprising a carbodiimide-based compound, and a solvent, and provides an improved processability in a slurry coating process for manufacturing a positive electrode for a lithium secondary battery due to its thixotropy by which sufficient flowability to flexibly respond to changes in slurry coating rate is secured.

Abstract: A slurry composition, and a positive electrode and a lithium secondary battery including the same are provided. The slurry composition includes a positive electrode active material, an electrically conductive material, a binder, a thickener comprising a lithiated carboxymethyl cellulose, an additive comprising a succinimide-based compound, and a solvent, and provides an improved processability in a slurry coating process for manufacturing a positive electrode for a lithium secondary battery, due to its thixotropy by which sufficient flowability to flexibly respond to changes in slurry coating rate is secured.

Abstract: The present disclosure relates to a positive electrode additive for a lithium secondary battery, and a positive electrode active material, a positive electrode and a lithium secondary battery including the same, and in particular, the positive electrode additive represented by Formula 1 is formed on a surface of a carbon material included in the positive electrode active material and is not dissolved in an electrolyte solution, which functions to electrically separate the positive electrode and a negative electrode, and accordingly, battery performance is enhanced by suppressing side reactions in the battery.

Abstract: Disclosed is a carbon-based fiber sheet and a lithium-sulfur battery including the same. The carbon-based fiber sheet for the lithium-sulfur battery is doped with a high concentration of nitrogen and thus plays a role of preventing diffusion by adsorbing lithium polysulfide eluted from a positive electrode during charging and discharging, thereby suppressing a shuttle reaction and thus improving capacity and lifecycle properties of the lithium-sulfur battery.

Abstract: The present disclosure provides a method for determining the remaining capacity of a lithium-sulfur battery using a voltage drop value obtained by applying a constant current in an open-circuit state and a battery pack implementing the method.

Abstract: The present disclosure relates to a lithium secondary battery containing tellurium as an additive for a positive electrode and bis (2,2,2-trifluoroethyl)ether as an additive for an electrolyte solution, which has an effect of improving the lifetime characteristic of the lithium secondary battery.

Abstract: A binder for preparing a positive electrode of a lithium secondary battery, and a method for preparing a positive electrode using the same. The binder includes two or more different lithium-substituted polyacrylic acids with different molecular weights. The lithium-substituted polyacrylic acids include two different lithium-substituted polyacrylic acids differing in weight average molecular weight by 500,000 or more from each other.

Abstract: A lithium electrode and a lithium secondary battery including the same. The lithium electrode has a surface oxide layer with a controlled thickness and surface roughness. The lithium electrode may be used as a negative electrode of a lithium secondary battery, for example, a lithium-sulfur secondary battery. A lithium-sulfur battery including the lithium electrode has an enhanced lifetime due to suppression of side reactions with polysulfide.

Abstract: A positive electrode comprising a current collector and a positive electrode active material layer disposed on at least one surface of the current collector, and a lithium-sulfur battery comprising the positive electrode are provided. The positive electrode active material layer comprises a positive electrode active material and an additive, and the additive comprises a transition metal-ferrocyanide compound.

Abstract: A binder for preparing a positive electrode of a lithium secondary battery, and a method for preparing a positive electrode using the same. The binder includes two or more different lithium-substituted polyacrylic acids with different molecular weights. The lithium-substituted polyacrylic acids include two different lithium-substituted polyacrylic acids differing in weight average molecular weight by 500,000 or more from each other.

Abstract: The present disclosure relates to a slurry composition for a positive electrode for a lithium secondary battery, and a positive electrode and a lithium secondary battery including the same, and more particularly, when manufacturing the positive electrode for the lithium secondary battery including slurry coating process, it is possible to increase the processability during the manufacture of the positive electrode for the lithium secondary battery, by manufacturing the positive electrode using a slurry composition for positive electrode with thixotropy that can secure flowability to an extent that can respond flexibly to changes in the coating speed of the slurry.

Abstract: Disclosed is a positive electrode for a lithium-sulfur battery, including a current collector; and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer includes a positive electrode active material and a binder, and the positive electrode active material layer has surface properties defined by the following Sa (arithmetic mean surface roughness of the positive electrode) and Sz (maximum height roughness of the positive electrode) ((i) 1 ?m?Sa?5 ?m, (ii) 10 ?m?Sz?60 ?m (wherein Sa is the average value of the distance from the middle surface of the surface irregularity structure of the positive electrode to the highest point and the lowest point of each irregularity part, and Sz means the distance from the lowest point to the highest point of the positive electrode)) and a method for manufacturing the same.

Abstract: Disclosed is a modified iron oxyhydroxynitrate including iron oxyhydroxynitrate and hydrogen phosphate ions adsorbed on a surface thereof. Also disclosed is a method for preparing the same, a positive electrode for a lithium secondary battery including the modified iron oxyhydroxynitrate as a positive electrode additive, and a lithium secondary battery including the same.

Abstract: Disclosed is a binder for an electrode of a lithium secondary battery, a positive electrode for a lithium secondary battery including the same, and a lithium secondary battery, more specifically, a binder which comprises a polymer including a carboxylate group and a cationic polymer that interacts electrostatically with the carboxylate group, thereby improving the bonding force of the electrode and thus improving the electrochemical reactivity and stability of the electrode and making possible to improve the stability, increase the capacity, and extend the lifetime of the lithium secondary battery including the electrode.

Abstract: A lithium electrode and a lithium secondary battery including the same, and in particular, to a lithium electrode including a lithium metal layer; and a surface treatment layer formed on the lithium metal layer, wherein the surface treatment layer includes a surface treatment compound including a functional group capable of bonding with lithium metal and a hydrocarbon group substituted with one or more fluorine. By being provided with a surface treatment layer including a specific functional group, the lithium electrode improves stability of lithium metal as well as suppressing side reactions on the surface, and thereby allows high capacity, high stability and long lifetime of a lithium secondary battery.

Abstract: A lithium secondary battery, and more particularly, to a lithium secondary battery having improved performance by minimizing the content of impurities such as sodium in the battery.

Abstract: Disclosed is a carbon-based fiber sheet and a lithium-sulfur battery including the same. The carbon-based fiber sheet for the lithium-sulfur battery is doped with a high concentration of nitrogen and thus plays a role of preventing diffusion by adsorbing lithium polysulfide eluted from a positive electrode during charging and discharging, thereby suppressing a shuttle reaction and thus improving capacity and lifecycle properties of the lithium-sulfur battery.

Abstract: A binder for a lithium-sulfur secondary battery and a lithium-sulfur secondary battery including the same. The binder includes a copolymer having a first polymerization unit derived from a first monomer and a second polymerization unit derived from a second monomer. The first monomer is alkyl acrylate having at least one functional group or alkyl methacrylate having at least one functional group. The second monomer is acrylic acid or methacrylic acid. The at least one functional group in the first monomer is a functional group having a single or repeated structure of a hydroxy group substituted or unsubstituted with alkyl having 1 to 4 carbon atoms, a thiol group substituted or unsubstituted with alkyl having 1 to 4 carbon atoms, or an amino group substituted or unsubstituted with alkyl having 1 to 4 carbon atoms. The second polymerization unit may have a lithiated form.

Abstract: A lithium-sulfur battery is provided. More specifically, a lithium-sulfur battery including a polymer non-woven fabric containing a liquid electrolyte between a positive electrode including sulfur and a separator is provided. By including a polymer non-woven fabric containing a liquid electrolyte between a positive electrode and a separator, the lithium-sulfur battery according to the present invention is capable of continuously supplying the liquid electrolyte to the positive electrode, and suppressing polysulfide elution. Accordingly, the lithium-sulfur battery has a reduced discharge overvoltage, and exhibits excellent discharge capacity and life time properties.