Abstract: Aspects of the present disclosure relates to an electrolyte for a lithium-sulfur secondary battery and a lithium-sulfur secondary battery comprising the same, and provides a lithium-sulfur secondary battery with improved life characteristics that can be imparted by adjusting a solvent, a nonsolvent and a lithium salt included in the electrolyte to specific conditions.

Abstract: Aspects of the present disclosure relate to an electrolyte for a lithium-sulfur secondary battery and a lithium-sulfur secondary battery comprising the same, and provides a lithium-sulfur secondary battery with improved life characteristics that may be imparted by adjusting a solvent, a nonsolvent and a lithium salt included in the electrolyte to specific conditions.

Abstract: Disclosed is a positive electrode for a lithium-sulfur battery, including a sulfur-carbon composite as a positive electrode active material. The sulfur-carbon composite includes a porous carbonaceous material having a high specific surface area, and the total pore volume in the carbonaceous material and a volume of pores having a specific diameter are controlled to specific ranges. Also disclosed is a lithium-sulfur battery using the sulfur-carbon composite. The lithium-sulfur battery shows reduced initial irreversible capacity and improved output characteristics and life characteristics.

Abstract: Disclosed is a positive electrode for a lithium-sulfur battery. The positive electrode includes a sulfur-carbon composite as a positive electrode active material. The sulfur-carbon composite includes a porous carbonaceous material having a high porosity and high specific surface area. Therefore, when the sulfur-carbon composite is applied to a battery, the battery shows a reduced initial irreversible capacity and improved output characteristics and life characteristics.

Abstract: Disclosed is a positive electrode for a lithium-sulfur battery, including a sulfur-carbon composite as a positive electrode active material. The sulfur-carbon composite includes a porous carbonaceous material having a high specific surface area, and the total pore volume in the carbonaceous material and a volume of pores having a specific diameter are controlled to specific ranges. Also disclosed is a lithium-sulfur battery using the sulfur-carbon composite. The lithium-sulfur battery shows reduced initial irreversible capacity and improved output characteristics and life characteristics.

Abstract: A positive electrode for a lithium-sulfur battery is provided. The positive electrode includes a positive electrode active material comprising a first and second sulfur-carbon composites respectively comprising a first and a second carbonaceous materials having a different specific surface area and pore volume from each other, and provides reduced initial irreversible capacity and improved output characteristics and life characteristics of a secondary battery.

Abstract: A method for preparing a sulfur-carbon composite including a step of pretreating a carbon material is provided. The method is capable of removing water and other impurities from the carbon material effectively, and the sulfur-carbon composite obtained by the method used as a positive electrode active material of a lithium-sulfur battery provides improved sulfur supportability and over-voltage performance of the lithium-sulfur battery, reduced initial irreversible capacity of the positive electrode active material, and improved output characteristics and life characteristics.

Abstract: A positive electrode for a lithium-sulfur battery is provided. The positive electrode includes a sulfur-carbon composite as a positive electrode active material. The sulfur-carbon composite includes a porous carbonaceous material having a BET specific surface area of larger than 1,600 m2/g and a particle diameter (D50) of primary particles of equal to or larger than 500 nm and less than 8 ?m provides reduced initial irreversible capacity and improved output characteristics and life characteristics of a lithium-sulfur battery.

Abstract: A lithium-sulfur battery which is capable of achieving high discharge capacity of sulfur (S) with a small amount of a positive electrode material is provided. The lithium-sulfur battery reduces cost for manufacturing a positive electrode due to the use of a dry manufacturing method including compressing a positive electrode active material powder into a predetermined shape without preparing a slurry for an electrode active material layer in the manufacture of the positive electrode. Using a multi-layered separator, the lithium-sulfur battery is capable of solving the nonuniform reactivity problem of the positive electrode manufactured by the dry manufacturing method.

Abstract: An electronic device includes: a communication unit which communicates with an information server that stores predetermined information, a plurality of address-offering servers that store IP addresses existing in a network and provide any one of the stored IP addresses, and a management server that includes area information on the network where the information server is located; and a controller which performs a request for an IP address of the information server for the use of information stored in the information server from the plurality of address-offering servers and the management server, checks whether the provided IP address can be used to the plurality of the address-offering servers and the management servers if one of the plurality of address-offering servers provides the IP address of the information server, and controls the communication unit to receive the information from the information server based on the IP address if a positive response signal for the use of the IP address is received from

Abstract: An electronic device includes: a communication unit which communicates with an information server that stores predetermined information, a plurality of address-offering servers that store IP addresses existing in a network and provide any one of the stored IP addresses, and a management server that includes area information on the network where the information server is located; and a controller which performs a request for an IP address of the information server for the use of information stored in the information server from the plurality of address-offering servers and the management server, checks whether the provided IP address can be used to the plurality of the address-offering servers and the management servers if one of the plurality of address-offering servers provides the IP address of the information server, and controls the communication unit to receive the information from the information server based on the IP address if a positive response signal for the use of the IP address is received from