Lg Chem, Ltd

Lg Energy Solution, Ltd.

Kepco Nuclear Fuel Co., Ltd.

Dae Jin Lee

Wang Mo Jung

Dong Hun Lee

Dong Hwi Kim

Sun Sik Shin

Sang Wook Lee

Sin Young Park

Ji Hoon Ryu

Jin Tae Hwang

Gi Beom Han

Woo Yeon Kong

Seul Ki Chae

Hyeong Il Kim

Young Jae Choi

Seong Hoon Kang

Bo Ram Lee

Seul Ki Kim

Joo Hong Jin

Tae Gon Kim

Eun Sol Lho

Ki Won Sung

Sang Jong Lee

Hak Yoon Kim

Young Baek Kim

Kwang Woo Yoon

Se Hui Sohn

Seoung Eun Chun

Byung Joon Chae

Byung Chan Baek

Kyun Heo

Jae Kyu Lee

Jin Young Hwang

Hae Nam Yang

Kyung Woo Shim

Seung Yong Son

A negative electrode includes a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material and a conductive material. The negative electrode active material includes SiO(0≤x<2) particles and the conductive material includes secondary particles in which a portion of one graphene sheet is connected to a portion of an adjacent graphene sheet and a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are coupled to each other, wherein the oxygen content of the secondary particles is 1 wt % to 10 wt % based on the total weight of the secondary particles, the specific surface area of the secondary particles measured by a nitrogen adsorption BET method is 500 m/g to 1100 m/g, and the carbon nanotube structure is included in the negative electrode active material layer in an amount of an 0.01 wt % to 1.0 wt %.

Negative electrode and secondary battery including negative electrode

The present invention relates to an electrode of a double-layer structure including a different type of particulate active material having a different average particle diameter, and a secondary battery including the same, and according to the present invention, the mechanical strength and stability of the electrode increases, and the secondary battery to which they are applied exhibits excellent discharge capacity.

Secondary battery electrode including mixture layer of double layer structure containing active materials of different particle diameters, and method for manufacturing the same

A method of preparing a positive electrode active material for a secondary battery includes preparing a lithium composite transition metal oxide which includes nickel, cobalt, and manganese and contains 60 mol % or more of the nickel among all metals except lithium, adding a moisture absorbent and the lithium composite transition metal oxide into an atomic layer deposition (ALD) reactor, and adding a coating metal precursor into the atomic layer deposition (ALD) reactor and forming a metal oxide coating layer on surfaces of particles of the lithium composite transition metal oxide by atomic layer deposition (ALD).

Method of preparing positive electrode active material for secondary battery

The present invention relates to a method for recovering a positive electrode active material from a lithium secondary battery including: 1) separating a positive electrode into a collector and a positive electrode part; 2) removing an organic substance by firing the separated positive electrode part; 3) washing the fired resultant and removing remaining fluorine (F); 4) adding a lithium-containing material into the washed resultant and firing to recover a lithium transition metal oxide.

Method for recovering positive electrode active material from lithium secondary battery

The present invention relates to a positive electrode active material for a secondary battery, which comprises a core including a lithium composite metal oxide, and a surface treatment layer located on a surface of the core and including an amorphous oxide, wherein the amorphous oxide including silicon (Si), nitrogen (N) and at least one metal element selected from the group consisting of a Group 1A element, a Group 2A element, and a Group 3B element, and a method for preparing the same.

Positive electrode active material for secondary battery and method for preparing the same

A positive electrode active material for a secondary battery and a secondary battery including the same are provided. The positive electrode active material for a secondary battery includes on the surface of a core, a surface treatment layer composed of a B and Si-containing amorphous oxide, and thus may exhibit reduced moisture reactivity, improved thermal and chemical stability, and high-voltage stability.

Positive electrode active material for secondary battery and secondary battery including same

Disclosed are a precursor of an electrode active material for a lithium secondary battery, in which a metal material ionizable through electrolytic decomposition is uniformly coated on a surface of a primary precursor formed of a transition metal hydrate, and a method of preparing the same.

Precursor of electrode active material coated with metal and method of preparing the same

The present invention provides a positive electrode active material for a lithium secondary battery which is capable of preventing the degeneration of a positive electrode active material and the generation of a gas during operating a battery due to humidity, by including a surface treatment layer of an amorphous glass including an alkali metal oxide and an alkaline earth metal oxide on the surface of a core including a lithium composite metal oxide and by decreasing humidity reactivity, and a secondary battery including the same.

Positive electrode active material for secondary battery, and secondary battery including the same

Disclosed are a cathode active material and a lithium secondary battery including the same, and a method of manufacturing the cathode active material, the method including:

Cathode active material and lithium secondary battery including the same, and method of manufacturing cathode active material

A passive cooling system of a nuclear power plant includes a steam generator, a cooling water storage tank, a water cooling heat exchanger, an air cooling heat exchanger, a divergence valve, and a cooling tower. The steam generator generates steam by heat exchange with a primary coolant system, and the cooling water storage tank stores cooling water therein. The water cooling heat exchanger is disposed in the cooling water storage tank, and the air cooling heat exchanger is connected to the steam generator. The divergence valve is controllable to divert steam from the steam generator into both the water cooling heat exchanger and the air cooling heat exchanger. Each of the cooling water storage tank, the water cooling heat exchanger, and the air cooling heat exchanger are located in the cooling tower.

Passive cooling system of nuclear power plant

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Daejeon, South Korea

Dae Jin Lee