Abstract:
PURPOSE: A redox flow secondary battery is provided to maximally expand an activation area by using porous metal foam as an electrode of the secondary battery, and to improve energy efficiency. CONSTITUTION: A redox flow secondary battery comprises the following: a unit cell (100) including a pair of electrodes which have a metallic coating layer on the outside, and are formed into porous foam; a pair of current collectors (40) combined to both sides of the unit cell; and a pair of cell frames (50) attached to each of the outside of the current collectors. The porous foam is capable of easily molding. The redox flow secondary battery includes an electrolyte and the porous electrodes (20) reacting with the electrolyte.
Abstract:
본 발명은 우수한 용량 특성과 높은 에너지 밀도를 갖는 리튬 이온 커패시터에 관한 것으로, 특히, 양극 활물질로 적용되는 탄소계 재료에 초기 비가역 용량이 큰 리튬 복합 금속 산화물을 특정의 양극 첨가제로 사용하는 리튬 이온 커패시터용 양극 활물질 및 그의 제조 방법, 이를 포함하는 리튬 이온 커패시터에 관한 것이다. 본 발명에 따르면, 금속 리튬을 사용하지 않고 전기화학적 방식으로 리튬을 음극에 도핑할 수 있고 리튬 이온 커패시터의 용량 특성 및 리튬 도핑 공정 안전성을 현저히 향상시킬 수 있다.
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: Cathode active materials for a lithium ion capacitor are provided to maximize the charging and discharging capacity of the lithium ion capacitor by electrochemically doping carbon cathode active materials with lithium. CONSTITUTION: An average outer diameter of a carbon nano tube is 500 um or less. A carbon nano tube composite has lithium metal oxide of 0.1 to 80 weights based on the carbon nano tube of 100 weights. The initial charging and discharging efficiency of the lithium metal oxide is 50 % or less. The average particle size of the lithium metal oxide is 10 um or less. The cathode has the cathode active materials. The anode has the anode active materials. A separator is formed between the cathode and the anode. [Reference numerals] (AA) Separator; (BB) Anode; (CC) Cathode; (DD) Current collector
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:
PURPOSE: A negative electrode active material is provided to restrain side reactions with an electrolyte on the surface of carbon based material, and to improve structural stability by forming a coating layer from heteroatom on the surface of carbon based material, thereby improving life time property of lithium secondary battery and rate property. CONSTITUTION: A non-aqueous negative electrode active material comprises carbon based material, and a coating layer formed through the substitution of heteroatom on the surface of the carbon based material. The heteroatom comprises phosphorous. The amount of the coating layer is 10 weight% or less based on the carbon based material. A manufacturing method of the negative electrode active material comprises a step of preparing the carbon based material and heteroatom material, and a step of forming the coating layer through the substitution of the heteroatom on the surface of the carbon based material.