Abstract:
PURPOSE: A room temperature chemical deposition system combining electron cyclotron resonance(ECR) plasma and a pulse-type direct current(DC) bias is provided to form a metal composite layer at a room temperature by accelerating the ions analyzed by plasma over a substrate while using a high voltage potential difference generated from a DC bias. CONSTITUTION: The substrate(11) on which a sample(12) is mounted is installed in a reaction chamber(1). An ECR apparatus(2) supplies plasma, connected to the reaction chamber. A precursor supply apparatus(3) supplies an organic metal compound ionized by the plasma, connected to the reaction chamber. An induction apparatus induces the ionized metal ions and organic ions to the sample on the substrate.
Abstract:
PURPOSE: A carbon active material, its preparation method, a carbon negative electrode containing the active material and a lithium secondary battery containing the carbon active material are provided, to improve the conductivity, the high efficiency charge/discharge characteristic and the cycle lifetime characteristic of an electrode. CONSTITUTION: The carbon active material comprises a thin film or a cluster layer made of a metal or a metal oxide with a thickness of 1-300 nm on the surface. Preferably the metal in the metal or the metal oxide is selected from the group consisting of Li, Al, Sn, Bi, Si, Sb, Ni, Cu, Ti, V, Cr, Mn, Fe, Co, Ag, and their alloy; and the carbon is graphite, coke or hard carbon. The method comprises the steps of suspending a carbon particle at a temperature of 100 deg.C or less by using a gas to form a layer; spraying a metal salt solution to the suspended carbon particle layer to coat the carbon particle with the metal salt; and heating the coated carbon particle at a temperature of 200-800 deg.C under the gas condition selected from hydrogen, nitrogen and argon.
Abstract:
PURPOSE: By adding a specific amount of an anionic surfactant or anionic surfactant/nonionic surfactant in aqueous solution of carbamide £(NH2)2CO| employed in selective non-catalytic reduction of nitric oxides, it is possible to spray carbamide solution finer than use aqueous solution of carbamide alone, especially accelerate chemical decomposition of carbamide over a relatively low temperature range of less than 900°C. CONSTITUTION: In the selective non-catalytic reducing agent for reducing nitric oxides(NOx) containing aqueous solution of carbamide £(NH2)2CO| as main Ingredient, the selective non-catalytic reducing agent is added with a sulfone-based anionic surfactant in an amount of 0.1 to 20wt.%, wherein the sulfone-based anionic surfactant is selected from sodium alpha olefin sulfonate 0.1-10 wt.% and linear alkylbenzene sulfonic acid 0.1-5 wt.%. Further, the selective non-catalytic reducing agent is added with coconut diethanol amide nonionic surfactant in an amount of 0.1-20 wt.%.
Abstract:
PURPOSE: Provided are a surface-modified carbon-based cathode for a lithium secondary battery, which has improved conductivity, high ratio charge and discharge property, electrode capacity, and cycle property, a preparation thereof, and the lithium secondary battery containing the same. CONSTITUTION: The cathode contains the carbon material as a cathode active material, wherein the particle surface of the carbon material is coated with metal or metal oxides by a chemical fluid deposition technique and the thickness of the coating layer is 1-300nm. The carbon material is graphite, coke, or hard carbon. The metal and/or the metal oxides are Li, Al, Sn, Bi, Si, Sb, Ni, Cu, Ti, V, Cr, Mn, Fe, Co, Ag, La, Pd, Ru, Au, Pt, Ir, alloy thereof, and/or the metal oxides thereof. The process for producing the cathode contains the steps of: fluidizing the carbon material by using inert gas; and supplying precursors of the metal or the metal oxides with associated gas under the proper temperature and pressure for coating.
Abstract:
본 발명은 배연 가스 중에 포함된 유해 가스 중 질소 산화물을 제거하는데 유용한, 백금(Pt) 또는 백금과 다른 금속(예, 구리, 니켈, 코발트)이 공침된 실리코알 루미노프스페이트-34(SAPO-34)계 분자체 촉매 및 그의 제조 방법 및 그를 이용한 질소 산화물의 탈질 방법에 관한 것이다. 본 발명의 백금이 담지된 SAPO-34계 촉매는 SAPO-34 분자체에 백금 화합물 또는 백금과 다른 금속 화합물(Me=구리, 니켈, 코발트)을 물리적으로 균질하게 혼합한 후 압력을 가하여 두께 약 1㎜의 원판으로 만든 후, 이를 작은 조각으로 분쇄하고 산소를 유입하면서 승온시킨 다음 소성시켜 얻는다. 본 발명의 방법으로 제조된 촉매는 종래의 제올라이트계의 촉매에 비해서 열안정성이 높고, 수증기와 산소에 의해서도 활성이 잃지 않는 우수한 특성을 나타내므로 질소 산화물 제거에서 유용하다.