Abstract:
본 발명은, 공기극을 하측에 위치함으로써 성능측정 도중 알칼리용액이 증발하더라도 정확한 성능측정을 할 수 있는 아연공기전지의 성능측정장치를 제공하기 위한 것으로, 아연극을 포함하는 알칼리용액을 내부에 수용하는 통 형상의 알칼리용액용기와; 상기 알칼리용액용기의 하부와 결합되는 공기극케이스 내부에 위치하는 공기극과; 상기 아연극과 상기 공기극의 전위차를 측정하는 전위측정부를 포함하는 공기아연전지의 성능 측정장치를 제공한다.
Abstract:
PURPOSE: A silicon anodal active material is provided to improve conductivity while reducing shrinkability and volume expansion of silicon anodal active material in charging/discharging repetition so that degradation of a battery and a sudden reduction of discharge capacity are suppressed and cycleability and coulombic efficiencies become excellent. CONSTITUTION: A manufacturing method of a silicon anodal active material for alithium secondary battery comprises the steps of: dipping a metallic catalyst (2) on the surface of 'the silicon particle (1) selected from (i) Si, Si-M alloy, and SiO and their combination', and growing a silicon nanostructure (3) from the surface of (ii) 'the silicon particle dipped' in the metallic catalyst. The M in the steps is 'an element selected from groups comprising the transition metal, alkaline earth metal, 2 group, 13 group, group 14 elements, rare-earth materials and their combination', not Si.
Abstract:
리튬을 삽입 및 탈리할 수 있는 화합물을 포함하는 1차 입자; 및 상기 1차 입자가 모여서 형성된 2차 입자를 포함하고, 상기 2차 입자는 코어부분이 비어있는 구조를 가지는 것인 리튬 이차 전지용 양극 활물질, 이의 제조 방법 및 이를 포함하는 리튬 이차 전지를 제공한다.
Abstract:
PURPOSE: A manufacturing method of a catalyst for oxygen reduction electrode is provided to provide the catalyst for oxygen reduction with excellent oxygen reduction catalytic activity and electric conductivity through a simple production process supporting nanoparticles of metal or metal oxide onto a catalyst support. CONSTITUTION: A manufacturing method of a catalyst for oxygen reduction electrode comprises: a support of a graphene oxide nanosheet which is reduced after being modified by ionic liquid; and a nanoparticle of metal or metal oxide supported by the support. A manufacturing method of the catalyst for oxygen reduction electrode comprises: a step of manufacturing an oxidation graphene nanosheet modified by ionic liquid by reacting the oxidation graphene nanosheet with the ionic liquid; a step of manufacturing a support by reducing the oxidation graphene nanosheet; and a step of mixing the support with a precursor of the metal or metal oxide, and growing the metal and metal oxide on the support by a solution-based growth mechanism. [Reference numerals] (1) Modifying step; (2) Reducing step; (3) Catalyst forming step
Abstract:
산화철(Ⅲ)(Fe 2 O 3 )을 용해제로 용해시켜 3가의 철 이온을 형성하는 단계; 상기 3가의 철 이온을 환원제로 환원시켜 2가의 철 이온을 형성하는 단계; 상기 2가의 철 이온, 리튬 공급원, 인산 공급원 및 용매를 혼합하여 침전물을 형성하는 단계; 및 상기 침전물을 열처리하는 단계를 포함하는 리튬 이차 전지용 양극 활물질의 제조 방법, 상기 제조 방법에 따라 제조된 리튬 이차 전지용 양극 활물질, 및 상기 리튬 이차 전지용 양극 활물질을 포함하는 리튬 이차 전지를 제공한다.
Abstract:
PURPOSE: A negative electrode active material for lithium secondary battery and a manufacturing method thereof are provided to simplify manufacturing process, enable mass production, and enhance lifetime of a battery. CONSTITUTION: A negative electrode active material for lithium secondary battery comprises a material(100) which is able to dope/de-dope lithium, a plurality of 0.1-3micron size external pores(101) formed on the material surface, a plurality of 10-50nm internal pores inside of the external pores. The material which is able to dope/de-dope contains Si. The negative electrode active material for lithium secondary battery has a Brunauer-Emmett Teller(BET) non-surface area of 2.0-20.0 m/g and a total pore volume of 0.03-0.06 cc/g.
Abstract:
PURPOSE: A negative active material for a rechargeable lithium battery is provided to ensure excellent coulomb efficiency, rate property and cycle lifetime. CONSTITUTION: A negative active material(10) for a rechargeable lithium battery comprises: an inner layer(3) including a material capable of doping and de-doping lithium; a carbon layer(5) located at the outside of the inner layer; and an outer layer(7) including a material capable of doping and de-doping lithium, which is located on the carbon layer. The materials capable of doping and de-doping lithium in the inner layer and the outer layer are the same or different.