Industry-University Cooperation Foundation Hanyang University

Sk Innovation Co., Ltd.

Enerceramic Inc.

Lg Chem, Ltd

Iucf-hyu

Industry-university Cooperation Foundation

Yang Kook Sun

Sang Ho Park

Seung Min Oh

Jang Yeon Hwang

Sung Woo Oh

Jung Hoon Kim

Jung Min Han

Myoung Hun Lee

Yoon Jung Kang

Myung Hoon Kim

Gil Ho Kim

Shin Ho Suk

Ki Soo Lee

Hun Gi Jung

Min Woo Jang

Woo Seong Kim

Doo Kyun Lee

Hyung Joo Noh

Other Metals are uniformly doped in a sodium transition metal oxide particle to obtain a cathode active material. As a result, it is possible to improve the battery performance by improving the physical properties of the material itself and stabilizing the structure during the charge/discharge process as well as electrochemical properties.

Metal-doped cathode active material for sodium secondary battery, method for manufacturing the same, and sodium secondary battery comprising the same

Provided are a positive electrode for a metal-sulfur battery, a method of manufacturing the same, and a metal-sulfur battery including the same. The positive electrode comprises a positive electrode active material layer including carbon material and sulfur-containing material. In the positive electrode active material layer, a region in which the sulfur-containing material is densified and a region in which the carbon material is densified are arranged separately. By providing a positive electrode capable of exhibiting a high utilization rate of sulfur, it is possible to provide a metal-sulfur battery having high capacity and stable life characteristics.

Positive electrode for metal-sulfur battery, manufacturing method therefor, and metal-sulfur battery comprising the same

Disclosed is a method for producing a cathode active material precursor for a sodium secondary battery by using a coprecipitation technique and a cathode active material precursor for a sodium secondary battery produced thereby, and a cathode active material for a sodium secondary battery using the cathode active material precursor for a sodium secondary battery and a method for producing the same.

Manufacturing method of positive active material precursor for sodium rechargeable batteries, positive active material precursor for sodium rechargeable batteries made by the same, and manufacturing method of positive active material for sodium rechargeable batteries, positive active material for sodium rechargeable batteries made by the same

Disclosed herein are double-layer cathode active materials comprising a nickel-based cathode active material as an inner layer material and a transition metal mixture-based cathode active material as an outer layer material facing an electrolyte. Since the nickel-based cathode active material as an inner layer material has high-capacity characteristics and the transition metal mixture-based cathode active material as an outer layer material facing an electrolyte has superior thermal safety, the double-layer cathode active materials have high capacity, high charge density, improved cycle characteristics and superior thermal safety.

Double-layer cathode active materials for lithium secondary batteries, method for preparing the active materials, and lithium secondary batteries using the active materials

The present invention relates to a rechargeable battery comprising a non-aqueous electrolytic solution using an alkyl methanesulfonate as a solvent for dissolving the electrolytic salt, and can improve the life characteristics of the battery at high temperature and the high-temperature performance.

Rechargeable battery comprising non-aqueous electrolytic solution using alkyl methanesulfonate as solvent for dissolving electrolytic salt

Disclosed herein is a 3V class spinel oxide with improved high-rate characteristics which has the composition Li[MMn]OS(0&#x2266;x&#x2266;0.1, 0.01&#x2266;y&#x2266;0.5, 0.01&#x2266;z&#x2266;0.5, and M is Mn, Ni or Mg). Further disclosed is a method for preparing the 3V class spinel oxide by carbonate coprecipitation of starting materials, addition of sulfur, followed by calcining. The 3V class spinel oxide is spherical and has a uniform size distribution. A lithium secondary battery including the 3V class spinel oxide has a constant plateau at a potential of 3V and shows superior cycle characteristics.

3V class spinel complex oxides as cathode active materials for lithium secondary batteries, method for preparing the same by carbonate coprecipitation, and lithium secondary batteries using the same

The present invention relates to a method for manufacturing a carbon-sulfur composite, a carbon-sulfur composite manufactured by the method, and a lithium-sulfur battery including the same. In the carbon-sulfur composite manufactured by the method for manufacturing the carbon-sulfur composite, the sulfur is filled up to inside of the carbon balls, and thereby uniformly distributed. Accordingly, the sulfur content is increased, resulting to increase of capacity property, and also electrode structure does not collapse even though the sulfur is changed to a liquid phase while charging or discharging the battery, resulting to showing stable cycle property.

Method for manufacturing carbon-sulfur composite, carbon-sulfur composite manufactured thereby, and lithium-sulfur battery

Disclosed herein is a cathode active material coated with a fluorine compound for lithium secondary batteries. The cathode active material is structurally stable, and improves the charge-discharge characteristics, cycle characteristics, high-voltage characteristics, high-rate characteristics and thermal stability of batteries.

Cathode active material coated with flourine compound for lithium secondary batteries and method for preparing the same

The present invention relates to a cathode active material for a lithium secondary battery and a process for preparing the same. In accordance with the present invention, the cathode active material having a high packing density was designed and synthesized and thus provided is a cathode active material for a lithium secondary battery exhibiting structural stability such as improved characteristics for charge/discharge, service life and high-rate and thermal stability, by modifying surface of the electrode active material with amphoteric or basic compounds capable of neutralizing acid produced around the cathode active material.

Cathode active material for lithium secondary battery, process for preparing the same and reactor for use in the same process

Disclosed herein are a manganese carbonate useful as a material for spinel-type LiMnO, having a spherical morphology, and a method of preparing the same. The spheric manganese carbonate has a high packing density and shows superior lifetime characteristics, leading to spinel-type LiMnOresistant to structural changes and having superior lifetime characteristics.

Process of precipitation for spheric manganese carbonate and the products produced thereby

Disclosed herein is a core-shell spinel cathode active material for lithium secondary batteries. The core portion of the active material is made of a spinel manganese-containing material substituted with fluorine or sulfur, having 4V-grade potential and showing low-cost and high-output characteristics, and the shell portion, which comes into contact with an electrolyte, is made of a spinel transition metal-containing material, having excellent thermal stability and cycle life characteristics and showing low reactivity with the electrolyte. Thus, the cathode active material shows significantly improved cycle life characteristics and excellent thermal stability.

Core-shell spinel cathode active materials for lithium secondary batteries, lithium secondary batteries using the same and method for preparing thereof

Growing community of inventors

Seoul, South Korea

Yang Kook Sun