PROBLEM TO BE SOLVED: To provide a lithium sulfur battery capable of maintaining high discharge capacity at a high level. SOLUTION: In a lithium sulfur battery comprising a positive electrode current collector, a positive electrode, an electrolytic solution layer, a negative electrode and a negative electrode current collector, a positive electrode and a positive electrode current collector are present in this order on one side of the electrolytic solution layer, A negative electrode and a negative electrode current collector are present in this order on the other surface of the layer, and the positive electrode comprises a first positive electrode layer and a second positive electrode layer in order from the side close to the positive electrode current collector, the first positive electrode layer Is characterized in that it contains sulfur particles coated with a polymer, sulfur particles and carbon, and the second positive electrode layer contains carbon and does not contain sulfur. (FIG.
Titles:
Cathode for lithium sulfur battery and lithium sulfur battery comprising the same
리튬 황 전지용 양극 및 이를 포함한 리튬 황 전지
Abstracts:
Collecting house; And a cathode active material layer formed on at least one surface of the current collector and containing a cathode active material including a sulfur element, a sulfur-based compound, or a mixture thereof, and a 2,2-dithio-bis-benzothiazole based compound A positive electrode for a lithium sulfur battery, and a lithium sulfur battery including the same.
집전체; 및 상기 집전체의 적어도 일면 이상에 형성되고, 황 원소, 황 계열 화합물 또는 이들의 혼합물을 포함하는 양극활물질과 2,2-디티오-비스-벤조티아졸계 화합물을 포함하는 양극활물질층;을 구비하는 리튬 황 전지용 양극, 및 이를 포함하는 리튬 황 전지가 제시된다.
Applicant:
LG CHEMICAL LTD [KR] (주식회사 엘지화학)
Inventors:
LEE CHOONG HYEON (이충현)
YANG DOO KYUNG (양두경)
KIM YU MI (김유미)
Titles:
Lithium-sulfur battery functional electrolyte and preparation method thereof
种锂硫电池功能电解液及其制备方法
Abstracts:
The invention discloses a lithium-sulfur battery functional electrolyte, wherein the functional electrolyte comprises a lithium salt, an organic solvent and a functional additive; wherein the functional additive is 3-methyl-1,4,2-dioxazole-5-ketone . The invention adds a functional additive 3 - methyl -1,4,2 - oxazol-5-one to the electrolyte, and the additive forms a stable solid electrolyte phase interface (SEI film) on the surface of the negative electrode by electrochemical process or chemical process. ), can protect the negative electrode in the lithium-sulfur battery, improve the compatibility of the electrolyte and the negative electrode, and improve the cycle performance and rate performance of the battery.
Titles:
Lithium-sulfur battery positive electrode protection material and its application
种锂硫电池正极保护材料及其应用
Abstracts:
Embodiments of the present invention provide a lithium-sulfur battery positive electrode protection material, which comprises a nanoporous carbon mesh and inorganic nanoparticles uniformly distributed in the nanoporous carbon mesh, and the spacing between any adjacent two inorganic nanoparticles is 3 nm-50 nm. The inorganic nanoparticles are metal compound nanoparticles or metal-metal compound composite nanoparticles, and the nanoporous carbon network and the inorganic nanoparticles constitute a three-dimensional nanoporous composite network. The positive electrode protection material has physical and chemical double-effect adsorption, can restrict lithium polysulfide to the vicinity of the positive electrode, effectively suppress the loss of the active material of the lithium-sulfur battery positive electrode, and accelerate the conversion of the soluble lithium polysulfide to the insoluble LiS or LiS. Thereby, the energy conversion efficiency and rate performance of the lithium-sulfur battery are greatly improved, and good cycle performance at high energy density can be achieved. The embodiment of the invention also provides a specific application of the lithium sulfur battery positive electrode protection material in a lithium sulfur battery.
Titles:
SULFUR-CARBON COMPOSITE AND METHOD FOR PREPARING THEREOF
황-탄소 복합체 및 이의 제조방법
Abstracts:
A crystalline or pseudocratic carbonaceous conductive material having a three-dimensional framework structure formed by aggregating a plurality of primary particles having pores; Sulfur existing in the pores of the plurality of primary particles and on the surface of the three-dimensional framework structure; And an outermost carbonaceous coating layer surrounding the carbonaceous conductive material and the sulfur.
기공을 갖는 복수의 일차 입자들이 집합되어 형성된 3차원 골격 구조를 갖는 결정상(crystalline) 또는 유사결정상(paracrystalline)의 탄소질 도전재; 상기 복수의 일차 입자들의 기공 내부 및 상기 3차원 골격 구조의 표면에 존재하는 황; 및 상기 탄소질 도전재 및 상기 황을 둘러싸는 최외각 탄소질 코팅층을 포함하는 황-탄소 복합체를 제공한다.
