Abstract:
PURPOSE: A manufacturing method of a negative electrode active material is provided to economically manufacture a composite active material for a negative electrode, having improved cycle performance. CONSTITUTION: A manufacturing method of a negative electrode active material comprises a step of mixing a carbon-containing resin particle and silicon nanoparticle; a step of forming a resin matrix containing the silicon nanoparticle by compressing the resin particle; and a step of heat-treating the resin matrix, and forming the porous carbon matrix containing silicon nanoparticle. The resin matrix has a spherical particle shape, and the carbon matrix also has a spherical particle shape. The carbon-containing resin particle additionally includes nitrogen atoms. On the spherical carbon particle, the nitrogen is doped. [Reference numerals] (AA) Mix resin particles containing carbon and silicon nanoparticles; (BB) Condense resin particles; (CC) Heat-process/carbonize resin matrix
Abstract:
PURPOSE: Nitrogen-doped graphene, an ultra capacitor which includes the same, and a manufacturing method thereof are provided to improve the energy storage capacity and the life span of cycle by substituting at least one carbon atom with nitrogen, and arranging the nitrogen doping similar to pyridine, pyrrole, or graphite. CONSTITUTION: Nitrogen-doped graphene includes at least one carbon atom substituted with nitrogen. The nitrogen doping is arranged in a pyridine-like sequence, a pyrrole-like sequence, or a graphite-like sequence. The amount of the nitrogen doping is 1.5-3.0%. A manufacturing method of the nitrogen-doped graphene includes the following steps. Graphene is treated with nitrogen plasma. The graphene is annealed at a temperature of 250-400 deg. C. [Reference numerals] (AA) Graphene oxide; (BB) Nitrogen plasma; (CC) Nitrogen doped graphene
Abstract:
PURPOSE: A method for preparing light emitting nanoparticles using a core/shell structure is provided to reduce host-guest material consumption by surrounding the external side of a silica nanoparticle with the host-guest material. CONSTITUTION: A silica nanoparticle is prepared based on a sol-gel reaction. A host-guest shell material with a light emitting property is coated around the core of the silica nanoparticle to obtain a sphere light emitting particle. The host-guest material is composed of a metal ion or a metal oxide. The guest material is one or more selected from erbium, europium, ytterbium, holmium, thulium, or the oxide of the same. The host material is one or more selected from yttrium, gadolinium, vanadium, zinc, titanium, or the oxide of the same.
Abstract:
본 발명은 용액 증발법을 이용한 나노물질의 배열방법에 관한 것으로 보다 상세하게는 나노물질을 고분자 물질로 코팅한 후 용매에 고르게 분산시켜 나노물질 함유 용액을 제조하는 단계; 상기의 나노물질 함유 용액을 기판에 부어 용매의 증발에 따라 나노물질을 배열하는 것을 특징으로 하는 용액 증발법을 이용한 나노물질의 배열방법에 관한 것이다. 용액 증발법, 나노물질, 배열