Lg Chem, Ltd

Lg Energy Solution, Ltd.

Seokhyun Yoon

Seokhee Yoon

Hosub Lee

Byunggook Lyu

Taehun Yoon

Eun Ju Park

Donghoon Suh

Jongmin Roh

Eunju Park

Dongjun Lee

Inseok Hwang

Jae Hoon Choe

Dongwook Lee

Young Chang Byun

Yoon Jae Lee

Jinmi Jung

Bugon Shin

Seung Wook Kim

Jiyoung Hwang

Hoyoung Kwak

Sangki Chun

A lithium transition metal oxide which is capable of minimizing a side reaction with an electrolyte, thereby suppressing the generation of gas during charging and discharging of a lithium secondary battery is provided. The lithium transition metal oxide is a lithium cobalt oxide which contains a hetero-element, wherein the hetero-element includes a 4th period transition metal; and at least one selected from the group consisting of a group 2 element, a group 13 element, a group 14 element, a 5th period transition metal, and a 6th period transition metal. The lithium transition metal oxide has a cumulative 50% particle diameter (D50) of 10.0 μm to 25.0 μm and a ratio (D/D) of a maximum particle diameter (D) to a minimum particle diameter (D) of 10.0 to 60.0 when measured by laser diffraction scattering particle size distribution.

Lithium transition metal oxide, positive electrode additive for lithium secondary battery, and lithium secondary battery comprising the same

The method includes mixing and heat-treating carbon nanotubes, a water-soluble polymer dispersant, and an iron (Fe) precursor to form an iron oxide-carbon precursor; mixing and calcining a lithium precursor and the iron oxide-carbon precursor at a temperature of 500° C. or higher to form lithium-iron oxide particles; and heat-treating a mixture containing the lithium-iron oxide particles and a lithium difluoro(oxalato)borate under an oxygen-containing gas atmosphere at a temperature of less than 300° C. to form a lithium-iron oxide coated with a lithium difluoro(oxalato)borate-containing layer.

Manufacturing method of cathode additives for lithium secondary battery

A preparation method according to the present invention includes use of an amine-based coupling agent to prepare plate-type manganese dioxide nanoparticles. The plate-type manganese dioxide nanoparticles thus prepared can be suitably mixed with a carbon-based conductive material and are thus useful a positive electrode material for pseudo-capacitors.

Method for preparation of plate-type manganese dioxide nanoparticles

The present invention relates to a metal oxide coated with a conductive polymer, including: a metal oxide; and a coating layer which is formed on the surface of the metal oxide and includes a conductive polymer, wherein the conductive polymer is a polymer of protonated monomers.

Metal oxide coated with conductive polymer, electrode for electrochemical device comprising the same, and method of producing the metal oxide

The preparation method according to the present disclosure is to easily prepare hexagonal molybdenum oxide (h-MoO) having a nanorod shape even in a low temperature precipitation reaction at atmospheric pressure without applying hydrothermal synthesis under high temperature and high pressure conditions. The hexagonal molybdenum oxide (h-MoO) nanorods prepared therefrom can be properly mixed with carbon-based conductive materials such as carbon nanofiber, and thus can be usefully used as an anode material for a pseudocapacitor.

Preparation method of hexagonal molybdenum oxide nanorod

The present invention relates to a method for preparing a lithium manganese oxide-based material useful in applications such as for pseudocapacitors and lithium ions batteries. More specifically, by synthesizing manganese oxide nanoparticles and mixing them with lithium salts, and conducting stepwise heat treatment processes under optimized conditions, a lithium manganese oxide-based material with excellent specific capacitance, having a high surface area with a small size, can be prepared.

Method for producing lithium manganese oxide-based cathode active material

An anode material including a metal oxide-conductive inorganic material complex including a metal oxide and a conductive inorganic material bound to the metal oxide, wherein the complex is doped with one or more doping elements selected from the group consisting of transition metals and amphoteric metal elements, and a preparation method thereof, are provided.

Pseudocapacitor anode material and method for preparing the same

The present invention relates to an aqueous electrolyte capable of improving low temperature performance. More specifically, the present invention provides an aqueous electrolyte that is an aqueous solution including lithium trifluoromethanesulfonate at a predetermined concentration range without separate additives, and thus can prevent freezing and realize high performance even at a very low temperature of about &#x2212;30&#xb0; C. or less, and an energy storage device including the same.

Aqueous electrolyte and energy storage device comprising the same

A method of preparing an anode active material for a pseudocapacitor is provided. According to the present invention, a method of preparing an anode active material for a pseudocapacitor, which enables expression of high specific capacitance and excellent output characteristics, is provided.

Process for preparing anode active material for pseudocapacitor

An aqueous electrolyte for a pseudo-capacitor and a pseudo-capacitor comprising the same, and more particularly an aqueous electrolyte for a pseudo-capacitor comprising an aqueous solvent, and a certain concentration or more of a lithium salt and a zwitterionic compounds, and a pseudo-capacitor comprising the aqueous electrolyte described above.

Aqueous electrolyte and pseudocapacitor comprising same

The present disclosure provides a method of preparing an anode active material having high specific capacitance in a simple and inexpensive process without applying high temperature and high pressure conditions by synthesizing urchin-shaped goethite iron oxide (alpha-FeOOH) using an aqueous solution containing thiosulfate ions and sulfate ions, followed by heat treatment to synthesize hematite iron oxide (alpha-FeO) having a nano-sized urchin-like structure, in order to provide an anode for a pseudocapacitor that is excellent in specific capacitance.

Preparation method of anode active material for pseudocapacitor

Disclosed are a single-source precursor for synthesizing metal chalcogenide nanoparticles for producing a light absorption layer of solar cells comprising a Group VI element linked as a ligand to any one metal selected from the group consisting of copper (Cu), zinc (Zn) and tin (Sn), metal chalcogenide nanoparticles produced by heat-treating at least one type of the single-source precursor, a method of preparing the same, a thin film produced using the same and a method of producing the thin film.

Method of preparing metal chalcogenide nanoparticles and method of producing light absorption layer thin film based thereon

Disclosed herein are a polarizing film manufacturing method including (a) injecting a coating solution containing a component functioning as a polarizer into a sealed chamber to form an injection condition of the coating solution, (b) supplying a polyvinyl alcohol film into the chamber and dyeing outer surfaces of the polyvinyl alcohol film with the coating solution, and (c) discharging the polyvinyl alcohol film dyed with the coating solution out of the chamber, a polarizing film manufacturing apparatus, and a polarizing film exhibiting improved optical properties manufactured using the same.

Method for manufacturing polarizing film using ultrasonic vibrator for atomizing coating solution

Disclosed herein is a micro-channel reactor formed by placing a planar upper plate and a planar lower plate, each having a channel formed therein, such that the upper plate and the lower plate face each other, wherein the channel includes one or more introduction channels, into which different fluids are introduced respectively, a mixing channel, along which the fluids introduced into the introduction channels flow in a state in which the fluids join each other, and a discharge channel, from which the fluids joining in the mixing channel are discharged, the mixing channel includes a stem channel extending from the introduction channels to the discharge channel and one or more branch channels that diverge from the stem channel and are then interrupted, and, when the fluids are mixed through repetitive diverging and joining, the fluids diverge in upward and downward directions and then join each other in leftward and rightward directions.

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Daejeon, South Korea

Seokhyun Yoon