Titles:
CARBON-SULFUR COMPLEX AND MANUFACTURING METHOD OF THE SAME
황-탄소 복합체 및 그의 제조방법
Abstracts:
The present invention provides a method for manufacturing a sulfur-carbon complex, comprising steps of: (a) stirring a porous carbon material with a solvent in which a carbonate-based compound and a volatile solvent are mixed, followed by drying the same; and (b) mixing sulfur with the porous carbon material and then carrying sulfur by a heat melting method. In addition, the present invention relates to the method for manufacturing the sulfur-carbon complex, comprising steps of: (a) mixing the porous carbon material and sulfur with the solvent in which the carbonate-based compound and the volatile solvent are mixed, and then stirring and drying the same; and (b) carrying sulfur with the porous carbon material with the heat melting method. According to the present invention, unlike existing technology, it is possible to reduce the occurrence of overvoltage and to increase an internal reactivity.
본 발명은 (a) 카보네이트계 화합물과 휘발성 용매가 혼합된 용매로, 다공성 탄소재를 교반 처리한 후 건조하는 단계; 및 (b) 다공성 탄소재에 황을 혼합한 후, 가열 용융 방법으로 황을 담지하는 단계;를 포함하는 황-탄소 복합체의 제조방법에 관한 것이다. 또한, 본 발명은 (a) 카보네이트계 화합물과 휘발성 용매가 혼합된 용매로, 다공성 탄소재 및 황을 혼합하여, 교반 처리한 후 건조하는 단계; 및 (b) 다공성 탄소재를 가열 용융 방법으로 황을 담지하는 단계;를 포함하는 황-탄소 복합체의 제조방법에 관한 것이다.
Applicant:
LG CHEMICAL LTD [KR] (주식회사 엘지화학)
Inventors:
KIM SOO HYUN (김수현)
HAN SUENG HOON (한승훈)
SOHN KWON NAM (손권남)
YANG DOO KYUNG (양두경)
Other family members:
US 2020152971 A1,
Pub. Date: 2020-05-14,
EPO Reference
Titles:
Carbon-doped sulfur composite samarium nitrate material and preparation method and application thereof
一种碳掺杂硫复合硝酸钐材料及其制备方法、应用
Abstracts:
The invention discloses a method for preparing a carbon-doped sulfur composite samarium nitrate material, which includes the following steps: disperse resorcinol, resorcinol, samarium nitrate, dispersant, and catalyst in water, adjust the temperature, and add formaldehyde , Stir the heat until the solution turns white, keep it warm, and then stand still to obtain a carbon precursor; take the carbon precursor and calcine it to get C‑Sm composite material; mix and grind the C‑Sm composite material with sulfur, then melt and diffuse to get carbon Doped with sulfur composite samarium nitrate material. The invention also discloses a carbon-doped sulfur composite samarium nitrate material, which is prepared according to the preparation method of the carbon-doped sulfur composite samarium nitrate material. The invention also discloses the application of the carbon-doped sulfur composite samarium nitrate material in lithium-sulfur batteries. The invention has a rich pore structure, which effectively improves the "shuttle effect" of polysulfides in lithium-sulfur batteries, improves the utilization rate of active materials and the electrochemical performance of lithium-sulfur batteries.
Titles:
Sulfur-containing composite material, preparation method and application thereof
一种含硫复合材料及其制备方法与应用
Abstracts:
A sulfur-containing composite material and its preparation method and application belong to the technical field of lithium-sulfur batteries. The sulfur-containing composite material includes a graphene layer, an XMnO nanosheet layer, and sulfur, where X = Co, Zn, or Mg; the graphene layer and the XMnO nanosheet layer are alternately stacked, and the graphene layer and the XMnO nanosheet The layers contain sulfur. The sulfur-containing composite material is used in a positive electrode of a lithium-sulfur battery. The advantages of the present invention are: the present invention obtains a graphene / XMnO nanosheet composite by a simple solution method, the synthesis method is easy to scale up, industrial production is performed, and the composite material can be prepared on a large scale. When the composite material of the present invention is used as a positive electrode material for a lithium-sulfur battery, it not only utilizes the high conductivity of graphene, but also takes into account the rate performance and capacity of the lithium-sulfur battery due to the adsorption effect of the bimetal oxide XMnO on polysulfide And cycle stability, high-performance lithium-sulfur batteries can be obtained.
Titles:
Silicon aluminum phosphate-sulfur composite material and preparation method thereof, lithium-sulfur battery positive electrode and lithium-sulfur battery
磷酸硅铝-硫复合材料及其制备方法、锂硫电池正极和锂硫电池
Abstracts:
The invention provides a silicon aluminum phosphate-sulfur composite material and a preparation method thereof, a lithium-sulfur battery positive electrode and a lithium-sulfur battery. Preparation method of silicoaluminum phosphate-sulfur composite material: pseudo-boehmite slurry and phosphoric acid solution are mixed and reacted to obtain a first solution; the aluminum salt solution and the silicon source solution are mixed to adjust the pH to alkaline, and the first solution and ring are added A suspension of hexylamine and hydrofluoric acid is obtained, the reaction is heated, the pH is adjusted to neutral or weakly alkaline, and the reaction is continued to obtain a silicoaluminophosphate template; the silicoaluminophosphate template is mixed with a sulfur-water suspension and heated to obtain a compound Materials, heat treatment of composite materials. The silicon aluminum phosphate-sulfur composite material is prepared using the preparation method described. The positive electrode of the lithium-sulfur battery is made of silicon aluminum phosphate-sulfur composite material. The lithium-sulfur battery includes the positive electrode of the lithium-sulfur battery. The silicon aluminum phosphate-sulfur composite material provided by this application can solve the problem of volume expansion of lithium-sulfur batteries, with higher energy density and good electrochemical cycle stability.
Titles:
Metal lithium surface protection method, negative electrode and metal lithium secondary battery
一种金属锂表面保护方法、负极及金属锂二次电池
Abstracts:
The invention provides a metal lithium surface protection method, a negative electrode and a metal lithium secondary battery. The method is: the phytic acid is dissolved in an organic solution such as dimethyl sulfoxide to treat the surface of the lithium metal, which is converted in one step by in-situ Means to obtain an organic-inorganic composite protective layer containing highly uniformly dispersed lithium phosphate on the surface, thereby ensuring uniform distribution of lithium ion flow on the surface of metallic lithium, fast ion transmission rate and dynamic process, making lithium deposition more uniform, and at the same time, the composite protective layer The flexibility also provides a certain buffer for the large volume expansion generated during the charging and discharging of the metal lithium anode, inhibits the growth of lithium dendrites, and realizes rapid charging and discharging at high current density. In the end, it can be applied to lithium-sulfur battery systems with high energy density to improve the charge-discharge specific capacity and cycle life of lithium-sulfur batteries.
Titles:
MANUFACTURING METHOD OF CARBON-SULFUR COMPLEX
황-탄소 복합체의 제조방법
Abstracts:
The present invention relates to a method for producing a sulfur-carbon composite to control the particle size of the sulfur-carbon composite to a specific range.
본 발명은 황-탄소 복합체의 입도를 특정범위로 조절하는 황-탄소 복합체의 제조방법에 관한 것이다.
The present invention provides a lithium-sulfur secondary battery comprising a cathode, an anode, a separator and an electrolytic solution. The cathode has an SC factor, represented by mathematical formula 1, of 0.45 or greater. The electrolytic solution comprises a solvent and a lithium salt, and the solvent comprises a first solvent having a DV2 factor represented by mathematical formula 2, of 1.7 or less, and a second solvent which is a fluorinated ether-based solvent.
본 발명은 양극, 음극, 분리막 및 전해액을 포함하는 리튬-황 이차전지를 제공한다. 상기 양극은 상기 수학식 1로 표시되는 SC factor 값이 0.45 이상이다. 상기 전해액은 용매 및 리튬염을 포함하며, 상기 용매는 상기 수학식 2로 표시되는 DV2 factor 값이 1.7 이하인 제1 용매, 및 불소화된 에테르계 용매인 제2 용매를 포함한다.
Applicant:
LG CHEMICAL LTD [KR] (주식회사 엘지화학)
Inventors:
PARK INTAE [KR] (박인태)
YANG DOO KYUNG [KR] (양두경)
CHOI YOUNGCHEOL [KR] (최영철)
KIM SOOHYUN [KR] (김수현)
LEE CHANGHOON [KR] (이창훈)
Titles:
Preparation method of modified three-dimensional graphene-coated sulfur positive electrode for lithium-sulfur battery
一种锂硫电池用改性三维石墨烯包覆硫正极的制备方法
Abstracts:
The invention discloses a method for preparing a modified three-dimensional graphene-coated sulfur positive electrode for a lithium-sulfur battery. The graphite powder is oxidized and peeled to form graphene oxide, and then the three-dimensional graphene is formed by high-temperature heating and freeze drying. The three-dimensional graphene is sulfonated, and then combined with polyaniline through in-situ reaction to form a modified three-dimensional graphene / polyaniline composite material. Finally, the elemental sulfur is coated on the modified three-dimensional graphene / polyaniline composite by melt dipping In the material, it can inhibit the dissolution and shuttle of polysulfide in the electrochemical reaction, improve the mechanical strength of the positive electrode material, improve the conductivity of the positive electrode material, and suppress the volume change of the sulfur positive electrode during charge and discharge.
Titles:
Composite material and its preparation method and application
一种复合材料及其制备方法与应用
Abstracts:
A composite material and its preparation method and application belong to the technical field of lithium-sulfur batteries. The structure of the composite material is composed of an XMoO layer, a YMoO layer, and a ZMoO layer in order from inside to outside. X, Y, and Z are divalent transition metal ions selected from Fe, Co, Ni, Cu, Mn, Zn, and Mg , Ca, Ba, which are different from each other; the mass percentages of the XMoO layer, YMoO layer, and ZMoO layer are a%, b%, c%, a≥b≥c, a + b + c = 100 & # 0x3002; The composite material is used in the cathode material of a lithium-sulfur battery. The composite material of the present invention has a gradient structure. When compounded with sulfur, the inner layer contains the most sulfur and the outer layer contains the least sulfur, which realizes gradient interception of polysulfide ions and is beneficial to achieve high capacity and long cycle.
