Abstract: An all-solid-state lithium ion secondary battery includes the lithium-free negative electrode having two or more carbon materials with different particle sizes to increase the contact area with the solid electrolyte. The all-solid-state lithium ion secondary battery includes a positive electrode, a solid electrolyte layer, a negative electrode current collector, and a negative electrode active material layer disposed between the solid electrolyte layer and the negative electrode current collector, wherein the negative electrode active material layer includes a first carbon material; a second carbon material; and Ag; wherein the first carbon material and the second carbon material have different average particle sizes.

Abstract: An all-solid-state lithium ion secondary battery includes the lithium-free negative electrode having two or more carbon materials with different particle sizes to increase the contact area with the solid electrolyte. The all-solid-state lithium ion secondary battery includes a positive electrode, a solid electrolyte layer, a negative electrode current collector, and a negative electrode active material layer disposed between the solid electrolyte layer and the negative electrode current collector, wherein the negative electrode active material layer includes a first carbon material; a second carbon material; and Ag; wherein the first carbon material and the second carbon material have different average particle sizes.

Abstract: A negative electrode includes a current collector and a negative electrode active material layer, wherein the negative electrode active material layer includes one or more layers, and any one of the one or more layers of the negative electrode active material layer contains oxygen in an amount of 2 to 10 at %. A lithium-ion secondary battery containing the negative electrode and a method of making the negative electrode are also provided.

Abstract: An all-solid-state lithium-ion secondary battery includes a positive electrode, a negative electrode, and a solid electrolyte between the positive electrode and the negative electrode. The negative electrode has a negative electrode current collector and a negative electrode active material layer that comprises a carbon material and Ag.

Abstract: An all-solid-state lithium-ion secondary battery includes a positive electrode, a negative electrode, and a solid electrolyte between the positive electrode and the negative electrode. The negative electrode has a negative electrode current collector and a negative electrode active material layer that comprises a carbon material and Ag.

Abstract: A method for manufacturing an all-solid-state battery capable of suppressing a short phenomenon occurring at a lateral portion during battery operation by laminating each of the unit cells after isostatic pressurization is provided. The method of manufacturing an all-solid-state battery includes the steps of a) sequentially laminating a solid electrolyte and a positive electrode on one side or both sides of a negative electrode to form a monocell or bicell; b) isostatically pressurizing the monocell or bicell; and c) laminating two or more of the isostatically pressurized monocells or bicells with a positive electrode current collector interposed therebetween, thereby contacting both sides of the interposed positive electrode current collector with the positive electrodes.

Abstract: A carrier-nanoparticle complex including: a carbon carrier; a polymer layer provided on a surface of the carbon carrier; and metal nanoparticles provided on the polymer layer, a catalyst including the same, an electrochemical cell or a fuel cell including the catalyst, and a method for preparing the same.

Abstract: The present disclosure provides an all-solid-state battery using lithium or a lithium alloy as an anode active material, the all-solid-state battery including: a cathode, a solid electrolyte layer, a coating layer, and an anode current collector, wherein the coating layer comprises an amorphous carbon, wherein the amorphous carbon comprises a nitrogen-containing amorphous carbon, and wherein a nitrogen amount (atomic %) included in the coating layer ranges from 0.5% to 7%. The all-solid-state battery according to the present disclosure may exhibit excellent capacity retention over cycles during high-rate charge and discharge.

Abstract: Disclosed is a lithium-sulfur battery having a high energy density, which is capable of utilizing 80% or more of the theoretical discharging capacity, 1,675 mAh/g, of sulfur by using SSE (sparingly solvating electrolyte) electrolyte system (discharging capacity: ˜1,600 mAh/gs) rather than the existing catholyte electrolyte system (discharging capacity: ˜1,200 mAh/gs) and by not using a nitrile-based solvent, and also is capable of implementing an excellent life performance by using a positive electrode carbon material having high specific surface area. The lithium-sulfur battery comprises an electrolyte including a first solvent containing a fluorine-based ether compound, a second solvent containing a glyme-based compound, and a lithium salt; and a positive electrode including an active material containing sulfur and a carbon material, and the carbon material includes two or more carbon materials having different average pore sizes from each other.

Abstract: A method for preparing a support for an electrode catalyst including forming first and second polymer layers having charges different from each other on a surface of a carbon support and carbonizing the result, wherein the polymers included in the first and the second polymer layers are an aromatic compound including a heteroatom, and the first or the second polymer includes a pyridine group.

Abstract: The present disclosure relates to a positive electrode for a lithium secondary battery comprising Mo6S8 treated with a base as an additive for a positive electrode active material layer, and a lithium secondary battery comprising the same.

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 lithium-sulfur battery with improved lifetime performance is provided. The lithium-sulfur battery comprises an electrolyte including a first solvent containing fluorine-based ether compounds, a second solvent containing a glyme-based compound, and a lithium salt containing lithium bis (pentafluoroethanesulfonyl) imide; and a positive electrode including an active material containing sulfur and carbon material, and can utilize 80% or more of the theory discharging capacity of sulfur and can operate for a long life, by using an electrolyte system of SSE excluding nitrile solvents and at the same time applying a carbon material with a high specific surface area to the positive electrode.

Abstract: A porous carbon material, a method for preparing the same, a positive electrode including the same, and a lithium-sulfur battery including the same are provided. The porous carbon material has a specific surface area of 200 to 1,700 m2/g and impurities therefrom are removed through pre-treatment using microwaves. The porous carbon material, when applied to the positive electrode of the lithium-sulfur battery, improves the charging overvoltage problem of the lithium-sulfur battery.

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: Disclosed is a heat exchange system between an external plan such as a data center and a water treatment device of a sewage treatment plant. The present system includes a hot-air supply unit that supplies heat generated from the external plant to a reactor using microorganisms in the water treatment device, and a coolant supply unit that supplies treated water discharged from the water treatment device to the external plant as a coolant for heat dissipation of the external plant. It is possible to simultaneously solve various problems in terms of environmental and economic aspects by enabling complementary heat exchange between the external plant and the sewage treatment plant.