Abstract:
PURPOSE: A separator for an electrochemical stability is provided to have excellent high temperature stability and to improve a shut down function thereof. CONSTITUTION: A separator for an electrochemical stability(100) comprises a base film(10) with a nonwoven type and a coating layer which consists of a ceramic powder(20), a polymer powder(30), and a polymer binder(40), and is formed on the surface of a non-woven fabric base film. A manufacturing method for the separator comprises: a step of manufacturing a mixed solution by mixing ceramic powder and polymer powder with an acetone solution; a step of manufacturing slurry by mixing the mixed solution and polymer binder; and a step of coating the unwoven fabric base film with the slurry and drying the slurry.
Abstract:
PURPOSE: A separator for a lithium-air secondary battery is provided to restrain shortage of electrolyte generated at reacting with air by controlling air permeability and to improve life time of lithium-air secondary battery. CONSTITUTION: A separator for a lithium-air secondary battery(100) comprises: a polyolefin-based separator main body(10); and a coating layer(20) coated on the surface of the separator main body with a polyvinylidene fluoride- hexafluoropropene copolymer. The comprises amount of the coating layer is 50 wt% or less and the thickness is 10 micron or less. The coating layer additionally comprises 20wt% or less of oxide. The oxide comprises at least one selected from ZrO2, SiO2, Al2O3, BaTiO3, TiO2 and CaCO3.
Abstract:
PURPOSE: A microcapsules with a built-in extinguisher composition is provided to not influence operation of a battery and to reduce activity of internal material or stopping the operation of a battery due to malfunction. CONSTITUTION: A microcapsules(10) for a lithium secondary battery comprises a micro-sized cell wall(12) in which a closed space is formed while formed of a thermoplastic resin, and an extinguisher composition filled in a closed space of the cell body. The melting point of the thermoplastic resin is 70-200 °C. The extinguishing composition is a fluorinated ketone compound or a first ammonium phosphate of solid phase. The extinguishing composition contains two or less of hydrogen atoms and has a boiling point of 80-100 °C. The cell body has a spherical or tubular shape.
Abstract:
본 발명은 레독스 플로우 이차 전지에 관한 것이다. 이러한 본 발명은 다공성 금속으로 형성되고, 상기 다공성 금속의 표면에 카본이 코팅되어 형성되는 한 쌍의 전극을 포함하는 단위 셀을 포함한다. 이러한 본 발명에 따르면, 탄소가 균일하게 코팅된 다공성 금속 전극을 사용하는 레독스 플로우 이차전지를 제공함으로써, 전극의 전도성이 향상되며, 또한, 표면에 비표면적이 넓은 탄소층을 균일하게 코팅함으로써, 반응성을 향상 시킬 수 있다. 결과적으로 레독스 플로우 이차전지의 용량 및 에너지 효율을 향상 시킬 수 있으며 셀의 저항을 효과적으로 감소시킬 수 있다. 게다가, 전극에 탄소층을 균일하게 코팅함으로써, 부식 저항성 또한 개선시킬 수 있다.
Abstract:
PURPOSE: A flow secondary battery has high energy storage density, high capacity, and high efficiency. CONSTITUTION: A flow secondary battery includes an ion separation film and a positive electrode and a negative electrode (21,23) each of which is arranged on both sides of the ion separation film. Electrolyte solution is supplied to each of the positive and negative electrode. As a catholyte, polysulfide solution is supplied. The catholyte is manufactured by mixing Li2S and sulfur into LiTFSI(Lithium bistrifluoromethanesulfonimide) TEGDME : DOXL (1 : 1) electrolyte solution. An anolyte of the electrolyte solution is LiTFSI(Lithium bistrifluoromethanesulfonimide) TEGDME : DOXL (1 : 1) electrolyte solution. [Reference numerals] (AA) Discharge; (BB) Charge