- - POSITIVE ELECTRODE FOR LITHIUM-SULFUR BATTERY AND LITHIUM-SULFUR BATTERY COMPRISING THEREOF
리튬-황 전지용 양극 및 이를 포함하는 리튬-황 전지
The present invention relates to a positive electrode for a lithium-sulfur battery including a sulfur-carbon composite having a plurality of island-shaped carbon coating layers on its surface, and a lithium-sulfur battery including the same. The positive electrode for a lithium-sulfur battery according to the present invention has excellent electrochemical reactivity, enabling high capacity, high output, and long lifespan of a lithium-sulfur battery including the positive electrode.
본 발명은 표면에 다수의 아일랜드 형상의 탄소 코팅층을 갖는 황-탄소 복합체를 포함하는 리튬-황 전지용 양극 및 이를 포함하는 리튬-황 전지에 관한 것이다. 본 발명에 따른 리튬-황 전지용 양극은 전기화학적 반응성이 우수하여 이를 포함하는 리튬-황 전지의 고용량화, 고출력화, 및 장수명화를 가능하게 한다.
LG ENERGY SOLUTION LTD [KR] (주식회사 엘지에너지솔루션)
KANG DA YOUNG (강다영)
YANG SEUNG BO (양승보)
LEE CHANG HOON (이창훈)
SONG MYEONG JUN (송명준)
LENGTH-WISE WELDED ELECTRODES INCORPORATED IN CYLINDRICAL CELL FORMAT LITHIUM-SULFUR BATTERIES
A lithium-sulfur battery includes a casing having a length and a width, the casing including at least an anode and a cathode wound into a jelly roll oriented parallel to the length of the casing, an electrolyte disposed in the lithium-sulfur battery, a negative terminal extending along the length of the casing, and a positive terminal extending along the length of the casing, the positive terminal and the negative terminal parallel to one another.
A kind of cathode material of lithium-sulfur battery and its preparation method and application
The present invention is a lithium-sulfur battery positive electrode material and its preparation method and application. The present invention first uses graphene oxide and a compound containing cobalt ions as raw materials, and obtains a cobalt complex-coated reduced graphene precursor through a reflux reaction; Then the CVD method is used to obtain the reduced graphene-carbon nanotube composite material modified by cobalt carbide, and finally the sulfur nanoparticles are evenly distributed on the surface of the cobalt carbide-modified graphene-carbon nanotube composite material by melting and diffusion method to obtain the cobalt carbide-modified graphene-carbon nanotube composite material. Graphene‑carbon nanotube/sulfur (Co2C@RGO‑CNT/S) composite. The composite material of the present invention has the advantages of large specific surface area, porous structure, and high conductivity as a lithium-sulfur battery cathode material, and its application to lithium-sulfur batteries can significantly improve the cycle performance and rate performance of the cathode material to effectively solve the problem of electrode The problem of too fast capacity fading occurs during the reaction. Moreover, the invention is simple and easy to implement, and can be applied to engineering production.