Titles:
Positive electrode active material for lithium secondary battery method for preparing the same and lithium secondary battery including the positive electrode active material
리튬 이차전지용 양극 활물질, 그 제조방법 및 이를 포함하는 리튬 이차전지
Abstracts:
Disclosed are a positive electrode active material for a lithium secondary battery, a method of manufacturing the same, and a lithium secondary battery including the same, capable of improving battery performance by applying various types of carbon-sulfur composite as a multilayer as a positive electrode active material. The cathode active material for a lithium secondary battery includes two or more active material composite layers in which sulfur is supported on a carbon material, and the carbon material included in the active material composite of one of the two or more active material composite layers is carbon contained in the active material composite of the other layer. It is characterized in that at least one of the material and the average particle size and shape are different.
다종의 탄소-황 복합체를 다중층으로서 양극 활물질로 적용하여 전지의 성능을 개선시킬 수 있는, 리튬 이차전지용 양극 활물질, 그 제조방법 및 이를 포함하는 리튬 이차전지가 개시된다. 상기 리튬 이차전지용 양극 활물질은, 황이 탄소재에 담지된 둘 이상의 활물질 복합체 층을 포함하며, 상기 둘 이상의 활물질 복합체 층 중 어느 한 층의 활물질 복합체에 포함된 탄소재는 다른 층의 활물질 복합체에 포함된 탄소재와 평균입도 및 형상 중 어느 하나 이상이 다른 것을 특징으로 한다.
Titles:
Nitrogen-doped porous carbon pore-loaded titanium nitride anode material for lithium-sulfur battery and preparation method thereof
一种锂硫电池用氮掺杂多孔碳孔道负载氮化钛负极材料及其制备方法
Abstracts:
The invention discloses a nitrogen-doped porous carbon pore-supported titanium nitride anode material for lithium-sulfur batteries, wherein the anode material comprises nitrogen-doped porous carbon and titanium nitride, and the titanium nitride is used for polysulfide adsorption Material, the nitrogen-doped porous carbon is used as a carrier, and the titanium nitride is supported in the pores of the nitrogen-doped porous carbon. The invention also discloses a preparation method of the above-mentioned materials. The nitrogen-doped porous carbon disclosed in the present invention has a large pore diameter, and titanium nitride can be loaded in its pores, so that the resulting negative electrode material has a physical confinement effect and a chemical adsorption structure, and the material is applied to lithium-sulfur batteries. It can make the battery have high conductivity, electric capacity and high stability, and has a wide range of application prospects in the battery field.
Titles:
Co-Ni carbon material loaded g-CN-rGO lithium-sulfur battery cathode material and preparation method thereof
一种Co-Ni碳材料负载g-CN-rGO的锂硫电池正极材料及其制法
Abstracts:
The invention relates to the technical field of lithium-sulfur battery cathode materials, and discloses a lithium-sulfur battery cathode material loaded with g-C3N4-rGO on Co-Ni carbon material, which includes the following formula raw materials: organic ligands, Co(NO), NiCl, g‑CN‑rGO composite material, sublimed sulfur. This Co-Ni carbon material supports g-CN-rGO as a cathode material for lithium-sulfur batteries. g-CN and rGO have a huge specific surface area, and g-CN contains a large amount of pyridine nitrogen structure, which can be formed with lithium polysulfide The N-Li bond realizes the adsorption and binding of lithium polysulfide under the synergistic effect, which reduces the shuttle effect of lithium polysulfide. The composite material has strong electrical conductivity and increases the transfer rate of charge. It is generated by in-situ polymerization. CoNi bimetallic MOFs are thermally cracked to form Co-Ni carbon material as a sulfur carrier. Under the synergistic catalysis of Co-Ni bimetal, it promotes the kinetic reaction of sulfur in the positive electrode, and the Co-Ni carbon material has a rich medium The pore and pore structure improve the elastic buffer for the volume expansion of sulfur during discharge.
