Abstract:
본 발명은 금속-황 전지에 사용하는 양극 활물질과 이의 제조 방법에 관한 것으로서, 본 발명에 따른 양극 활물질은 구형 유황 입자, 구형 유황 입자의 중심부를 관통하여 외부로 돌출되는 섬유상 도전재들, 상기 구형 유황 입자의 표면을 둘러싸는 구형 도전재를 포함하여 구성되어 있다. 본 발명의 양극 활물질에 의하면, 금속-황 전지의 유황활물질의 내부까지 도전재를 삽입하여 유황의 이용률을 최대화하여 용량을 증대시킬 수 있는 효과가 있다.
Abstract:
본 발명은 유황 다공성 도전재 나노복합체를 함유한 리튬유황 이차전지용 양극에 관한 것으로, 더욱 상세하게는 공극을 가진 다공성 도전재의 공극 내부에 유황입자가 충전되고, 표면을 산화 실리콘으로 코팅시킨 후 열처리를 통해 유황의 일부를 기화시켜 기공 내부에 빈 공간이 확보된 유황 다공성 도전재 나노복합체를 제조함으로써 리튬 폴리설파이드가 외부로 확산되어 나가지 못하도록 감금시키고, 폴리설파이드 셔틀 현상이 일어 나지 않아 충전시 자가방전 효과를 방지함으로써 배터리의 수명을 연장시키는 효과가 있는 유황 다공성 도전재 나노복합체를 함유한 리튬유황 이차전지용 양극에 관한 것이다.
Abstract:
An objective of the present invention is to provide a cathode electrode which: is capable of overcoming the limitation of sulfur capacity of a cathode active material using a traditional carbon material, especially extended graphite, to become a conductive material having large surface area, light weight, and high strength. Therefore, by increasing sulfur capacity, the charging and recharging lifespan of a battery can be effectively enhanced.
Abstract:
The present invention relates to a lithium-sulfur battery using a high-ionic solid composite conductor which prevents sulfur having fluidity at high temperature(more than or equal to 120°C) above a melting point from being leaked out so that the lithium-sulfur battery, which is operable at room temperature and even at high temperature, is implemented. Therefore, the said battery can be used without performance degradation, and ion conductivity at high temperature is even increased to improve the output performance of the battery.
Abstract:
The present invention relates to a high-ionic solid conductor for lithium battery and a lithium battery using the same, and more specifically, to a high-ionic solid conductor for lithium battery and a lithium battery using the same which stably secure an ion conduction pathway by minimizing interface resistance and minimize the interface resistance with an electrode active material in the inner region of the electrode. To this end, the present invention comprises: a pore-free part with a compact structure; and at least one multiporous part with a plurality of open pores. The multiporous part has 20-90% porosity.
Abstract:
PURPOSE: A positive electrode for a lithium sulfate secondary battery is provided to minimize self-discharging effect by preventing polysulfide shuffle phenomena, by having a three-dimensional network structure, thereby extending lifetime of a battery. CONSTITUTION: A positive electrode for a lithium sulfate secondary battery containing infiltrated mesoporous carbon nanocomposites with vacant mesoporous carbon has a nanocomposite structure which has pores filled with sulfate particles; and a porous conducting agent, and mesoporous conducting agent with an empty pore, by a mixing volume ratio of 1:0.1-0.9. The mesoporous conducting agent has an average particle diameter of 10 nm - 100 micron, and the porosity thereof is 10-90 %. The average particle diameter of the sulfur particle is 1 nm - 50 micron. [Reference numerals] (AA) Porous conductive material; (BB) Sulfur particle; (CC) Heat treatment; (DD) Sulfur/porous conductive mateiral nanocomposite; (EE) Sulfur/porous conductive material nanocomposite + Porous conductive material; (FF) Binder