Abstract:
A method for producing an anode material for a secondary battery according to the present invention includes: a step for filling a container with a powder-type spheroidal graphite and then maintaining a vacuum state; a step for producing a pitch-graphite paste by injecting and stirring a pitch solution in the container; a step for coating the spheroidal graphite with pitch by heating the pitch-graphite paste to a vacuum state and volatilizing a solvent; and a step for performing heat treatment and carbonizing treatment on the pitch-coated spheroidal graphite.
Abstract:
Provided are a negative electrode active material for a rechargeable lithium battery containing a core particle that contains an active particle, a first carbon-based particle, a first amorphous carbon, and a pore; and a shell layer that is coated on a surface of the core particle and contains a second carbon-based particle and a second amorphous carbon, the active particle containing a metal particle, a metal-containing compound particle, or a combination thereof, the first carbon-based particle and the second carbon-based particle being identical to or different from each other, and containing scaly graphite, fine carbon particles, or a combination thereof, and the first amorphous carbon and the second amorphous carbon being identical to or different from each other, and containing soft carbon, hard carbon, or a combination thereof, a method for preparing same, and a negative electrode and a rechargeable lithium battery including same.
Abstract:
Disclosed is an anode active material for a rechargeable battery. The anode active material according to an embodiment of the present invention contains first spherical particles in which first particle precursors, which are scaly graphite fragments, are headed; and second particles that are dispersed between the scaly graphite fragments in the first particles. The second particles contain (i) at least one selected from a group consisting of SiOx, Si1-xMxOy, and a combination thereof; (ii) a combination of SiOx and Si; and (iii) at least one material selected from a group consisting of a combination of Si1-xMxOy and Si.
Abstract:
The present invention relates to an activated carbon where pore distribution is regulated and a method of manufacturing the same. Disclosed are a method to manufacture activated carbon by preparing a powder form of coconut shells activated carbon or coconut shells chars where coconut shells are carbonized as a first raw material and activated carbon having brewers grain powder as a raw material or brewers grain chars which brewers grains are carbonized as a second raw material; adding a combining material in the first and the second material and evenly mixing; molding the mixed materials; carbonizing the molded raw material in an inactivated condition; and activating the carbonized mixture, and activated carbon manufactured thereby. [Reference numerals] (S100) Preparing a powder form of coconut shells activated carbon or coconut shells chars; (S110) Preparing brewers grain powder or brewers grain chars; (S120) Adding and evenly mixing a combining material; (S130) Molding the mixed materials; (S140) Carbonizing the molded raw material in an inactivated condition; (S150) Activating the carbonized mixture
Abstract:
본 발명은 제철 공정 중 용융철(용선)의 냉각 중에 석출하는 키쉬(Kish) 흑연의 회수 방법에 관한 것으로서, 제철공정 부산물을 분급하여 소정 범위의 입도를 갖는 키쉬 흑연 함유 시료를 선별하는 분급 선별 단계, 상기 키쉬 흑연 함유 시료를 수용액화하고, 수용액 상부에 부유된 키쉬 흑연 시료를 분리하는 부유 선별 단계, 상기 분리된 키쉬 흑연 시료를 분쇄하여 시료 중의 철 및 철 산화물 입자를 탈리하는 분쇄 단계 및 상기 분쇄된 키쉬 흑연 시료를 상기 철 및 철 산화물 입자로부터 분리 회수하는 분리 회수단계를 포함하는 키쉬 흑연 분리방법을 제공하며, 나아가, 본 발명은 상기 얻어진 키쉬 흑연을 이용한 그래핀 혹은 유사 그래핀을 제조하는 방법을 제공한다.
Abstract:
본 발명은 출발물질인 천연 그라파이트 및 카본 나노 섬유 분말과 황산 및 질산 용액을 반응시켜 그라파이트 옥사이드를 합성하는 제1 단계; 합성된 상기 그라파이트 옥사이드를 박리시켜 그래핀을 제조하는 제2 단계 및 제조된 상기 그래핀을 질소 분위기 플라즈마 처리하여 상기 그래핀의 격자 내에 질소 관능기를 치환시키는 제3 단계를 포함하는 것을 특징으로 하는 함질소 그래핀 제조방법 을 제공한다. 본 발명에 의하면, 그래핀의 박리도를 조절할 수 있고, 질소와 같은 이종원소를 포함하는 그래핀을 간단하게 제조할 수 있다.
Abstract:
본 발명은 제강용 첨가제로 사용되는 백운석 또는 생석회의 분말에 폴리스티렌이 슬러리 형태로 유동화된 용액으로 이루어지는 결합제를 혼합하고 압력을 가하여 성형하는 제강용 첨가제 및 이의 제조 방법에 관한 것으로, 본 발명의 제강용 첨가제는 소성된 백운석 및 생석회 중 어느 하나의 분말로 이루어지는 기재와; 폴리스티렌 및 상기 폴리스티렌의 용해가 가능한 용매가 혼합된 혼합 용액으로 이루어지는 결합제를 포함하며, 상기 폴리스티렌 1 중량부에 대하여 기재 2 내지 200 중량부, 용매 0.5 내지 10 중량부가 혼합된다. 제강, 첨가제, 백운석, 생석회, 폴리스티렌
Abstract:
PURPOSE: A particle including the composite oxide and the composite carbide of calcium and magnesium, a method for manufacturing the particle, a furnace wall protecting additive including the same are provided to maintain the intensity of the particle by carbonizing the surface of a material containing the composite oxide. CONSTITUTION: A particle(10) includes a core part(11) and a surface layer(12). The core part includes the composite oxide of calcium and magnesium. The surface layer includes the composite carbide of the calcium and the magnesium. The core part is the massive body of the composite oxide or the molded body of the powdered composite oxide of the calcium and the magnesium. A binder is one selected from textrin, molasse, and Pregelatinized starch. The molded body includes 0.5-30 parts by weight of the binder, based on the 100.0 of the powdered composite oxide. The particle is obtained by contacting the core part with carbon dioxide.
Abstract:
A carbon raw material pre-treating method for preparing activated carbon is provided to prepare activated carbon having high yield and capacitance by pre-treating the carbon raw material for preparing the activated carbon. A carbon raw material pre-treating method for preparing activated carbon comprises the steps of: adding 100 to 200 parts by weight of an alkali salt to 100 parts by weight of carbon raw material; heat-treating the mixture to a temperature of 300 to 500 deg.C; and adding 100 to 400 parts by weight of an alkali salt to 100 parts by weight of the heat-treated mixture to activate the resulting mixture. The carbon raw material is coal-, petroleum-, or wood-based carbon raw material.