Chonnam National University

Lg Chem, Ltd

Hyundai Motor Company

Korea Advanced Institute of Science and Technology

Seoul National University

Postech Research and Business Development Foundation

Institute for Basic Science

Jae Kook Kim

Jin Sub Lim

Song Taek Oh

Dong Han Kim

Geun Chang Chung

Seung Ho Ahn

Su Rim Lee

Ki Suk Kang

Sang Uck Lee

Mi Ju Kim

In Sun Yoo

Tae Ryang Kim

Chul Hong Woo

Ji Hyun Hong

Eun Joung Kim

Dong Hwa Seo

Eun Seok Choi

Yung Eun Sung

Kug Seung Lee

A method for preparing a transition metal electrochemical catalyst according to an embodiment of the present disclosure includes dissolving a nitrogen precursor and a transition metal precursor in a polyol-based solvent so as to prepare a solution in which transition metal ions and free anions are coordinated, and mixing same with a support so as to prepare a mixture, igniting the mixture so as to carbonize the polyol-based solvent, thereby forming transition metal nanoparticles encompassed by carbon, performing heat treatment in order to carbonize remaining organic matter contained in the mixture, and removing, through acid treatment, impurities and transition metal nanoparticles not encompassed by carbon, and then removing remaining acid through washing and additional heat treatment, thereby a nanocatalyst having a structure in which a single-atom transition metal-nitrogen bonding structure and/or transition metal nanoparticles encompassed by carbon exist is synthesized.

Transition metal electrochemical catalyst prepared using ultrafast combustion method, and synthesis method therefor

Provided are a mixed cathode active material having improved power characteristics and safety, and a lithium secondary battery including the same. More particularly, the present invention relates to a mixed cathode active material which may assist power in a low SOC range to widen an available state of charge (SOC) range and may simultaneously provide improved safety by blending substituted LFP, in which operating voltage is adjusted by substituting a portion of iron (Fe) with other elements such as titanium (Ti), in order to prevent a rapid increase in resistance of manganese (Mn)-rich having high capacity but low operating voltage in a low SOC range (e.g., a SOC range of 10% to 40%), and a lithium secondary battery including the mixed cathode active material.

Mixed cathode active material having improved power characteristics and safety, and lithium secondary battery including the same

Provided is a secondary battery comprising a positive electrode active material represented by the following Chemical Formula 1,Li{LiMnMM'}O&#x2003;&#x2003;[Chemical Formula 1]

Positive electrode active material having improved safety and lifetime characteristics and lithium secondary battery comprising the same

The present invention features a high-capacity anode material for rapidly chargeable and dischargeable lithium secondary batteries, which is composed of LiTiOnanoparticles. The LiTiOnanoparticles of the present invention exhibit excellent crystallinity and high rate capability compared to those synthesized using a conventional polyol process or solid reaction process by converting LiTiO, which is a zero-strain insert material spotlighted as an anode active material for lithium secondary batteries, into LiTiO, having a high crystalline nanostructure using a solvothermal synthesis process without performing additional heat treatment. The present invention also features methods of, and a method of preparing the high-capacity anode materials described herein.

High-capacity anode material for lithium secondary batteries and process for synthesizing the same

Provided are embodiments of a method of synthesizing nano scale electrode materials using an ultrafast combustion technique and nano scale electrode materials synthesized using the method. The method does not require a process of annealing reaction products required for synthesis of electrode materials or any other additional processes, such as cleaning, filtering, and drying processes, so that it can take only several seconds to several minutes to obtain a resultant product.

Method for synthesizing nano scale electrode materials using an ultra-fast combustion method, and nano scale electrode materials synthesized by the method

An electrode material obtained using a polyol process and a synthesis method is provided. The synthesis method includes steps of preparing a mixed solution by mixing a transition metal compound, a polyacid anionic compound and a lithium compound with a polyol solvent; and obtaining a resultant product by reacting the mixed solution in a heating apparatus. There is an advantage in that the electrode material, which has crystallinity due to a structure such as an olivine structure or a nasicon structure, can be synthesized using a polyol process at a low temperature without performing a heat treatment proces. The nanoelectrode material synthesized by the method has a high crystallinity, uniform particles, and a structure having a diameter ranging from several nanometers to several micrometers. Further, the electrode material has a high electrochemical stability.

Method for synthesizing electrode material using polyol process

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Gwangju, South Korea

Jae Kook Kim