Lg Chem, Ltd

Lg Energy Solution, Ltd.

Samsung Sds Co., Ltd.

Electronics and Telecommunications Research Institute

Korea Advanced Institute of Science and Technology

The Catholic University of Korea Industry-Academic Cooperation Foundation

Dongguk University Industry-Academic Cooperation Foundation

Sj Materials Co., Ltd.

The Catholic University of Korea Industry-Academic Cooperation Foundation, Catholic Univ. of Korea Songeui Campus

Sheisone Co., Ltd.

Lg Chem, Ld.

Sugentech, Inc.

Eun Kyung Kim

Yong Ju Lee

Sang Wook Woo

Oh Byong Chae

Sun Young Shin

Su Min Lee

Jun Hyuk Song

Jung Hyun Choi

Rae Hwan Jo

Dong Hyuk Kim

Yoon Ah Kang

Hee Won Choi

Hyun Chul Kim

Je Young Kim

Ju Ho Chung

Hyo Jin Yoon

Hyun Wook Kim

Sangwook Woo

Dong Sub Jung

Su Jin Park

Ye Ri Kim

Se Mi Park

Su Yeon Lee

Il Geun Oh

Seung Youn Choi

Ohbyong Chae

Duk Jae Moon

Tae Joong Kim

Jin Hyuck Jeong

Ki Hwan Kim

Hyun Jun Lee

Yu Ro Lee

Jeong Woo Shon

Jung Woo Yoo

Young Hyun Kim

Hyun Seo Park

Seung Kwon Baek

An Seok Lee

Byung Hun Oh

Mi Rim Lee

Ji Hoon Cho

Jung Hoon Sohn

Seung Hyun Kang

Sung-Hee Lee

Sung Bin Park

Ji Heon Ryu

Seok Ki Kim

Hee Soo Lee

Han Ho Lee

Mi-La Cho

Joo Hee Lee

Joo Sung Lee

Seon-Yeong Lee

Ki Hyo Moon

Won Ik Kim

Suk In Noh

Mi Kyeong Lee

Byoung Man Bang

Dong-Yun Shin

Jang Wook Choi

Chang Hoon Lee

Yoonah Kang

Jae Wook Lee

Heewon Choi

Chang Ju Lee

Lilin Piao

Eun-Jung Lee

Ji Hyun Yoon

Il Kyo Jeong

Young Jo Ko

Jae Heung Kim

Hye Jin Kim

Hong Kyu Park

Min Jung Kim

Heesoo Lee

Sung Hwan Park

Mi Young Yun

Jae Su Song

Soo Jung Jung

Joo Young Lee

Min-Jung Park

Sung-Hwan Park

Kyu Young Choi

Su-Min Lee

Mi La Cho

Hye-Jin Son

Mi Jin Sohn

Sung Man Lee

Seong Kwang Kim

Hyeon Min Song

Seung Kwon Cho

Yun Hee Cho

Jae-Kyung Kim

So Ra Lee

Hyun Woong Yun

Dong Gyu Lee

Kwan Sik Yoon

Mi Ru Jo

Yong Mook Kang

Seok-Jung Kim

There is provided a communication device. The communication device may comprise one or more processors; a communication interface; and a memory that stores a computer program executed by the one or more processors, wherein the computer program includes instructions for operations of: forming a general security channel according to a first transport layer security (TLS) protocol that does not support a post-quantum cryptography algorithm with another communication device; forming a communication channel of an application layer (L) with another communication device through the general security channel; forming a quantum security channel by performing a handshake procedure according to a second TLS protocol that supports the post-quantum cryptography algorithm with another communication device through the communication channel; and communicating with another communication device through the quantum security channel.

Communication method for quantum security and communication device supporting the same

The present invention relates to a negative electrode active material including a spherical carbon-based particle, and a carbon layer disposed on the spherical carbon-based particle and including a nano-particle, wherein the nano-particle has a silicon core, an oxide layer disposed on the silicon core and including SiO(0<x≤2), and a coating layer covering at least a portion of the surface of the oxide layer and including LiF.

Negative electrode active material, negative electrode including the same, and secondary battery including the negative electrode

A negative electrode active material for a lithium secondary battery which includes first negative electrode active material particles including artificial graphite particles and a carbon coating layer formed on the artificial graphite particle; and second negative electrode active material particles including natural graphite particles, wherein the first negative electrode active material particles have a larger average particle diameter (D) than an average particle diameter (D) of the second negative electrode active material particles, and a weight ratio of the first negative electrode active material particles and the second negative electrode active material particles is in a range of 70:30 to 95:5.

Negative electrode active material for lithium secondary battery, and negative electrode for lithium secondary battery and lithium secondary battery including the same

Provided are a negative electrode for a lithium secondary battery having reinforced insulating properties, which comprises a negative electrode active material layer; and a ceramic separating layer formed on the negative electrode active material layer, wherein the negative electrode active material layer has an arithmetic average surface roughness (Ra) of 0.01 μm to 0.3 μm, and the ceramic separating layer has a thickness of 1 μm to 30 μm, and a lithium secondary battery comprising the same.

Negative electrode for lithium secondary battery and lithium secondary battery comprising the same

A method for manufacturing a negative electrode for a lithium secondary battery including a patterned lithium metal that homogenizes the electron distribution in the lithium electrode and prevents the growth of the lithium dendrites when driving the lithium secondary battery.

Method for manufacturing anode for lithium secondary battery

A method according to an embodiment of the present disclosure includes obtaining proof data including a photographed image and a challenge code for proving original of the image, generating hash data by using the proof data, generating signature data for the hash data, transmitting the proof data, the hash data, and the signature data to a server, and receiving an access path to an original verification result of the proof data from the server.

Method for proving original of data, and apparatus therefor

A negative electrode active material for a lithium secondary battery, the negative electrode active material including, based on 100 parts by weight of the total negative electrode active material, 5 parts by weight to 20 parts by weight of a first carbon-based particle, 55 parts by weight to 90 parts by weight of a second carbon-based particle, and 1 part by weight to 40 parts by weight of a silicon-based particle, wherein the specific surface area of the first carbon-based particle is 1.5 m/g to 4.5 m/g, the specific surface area of the second carbon-based particle is 0.4 m/g to 1.5 m/g, and the specific surface area of the first carbon-based particle is greater than the specific surface area of the second carbon-based particle, and capable of solving the problem of lifespan deterioration which may be caused by the use of a silicon-based particle as a negative electrode active material.

Negative electrode active material for lithium secondary battery and lithium secondary battery comprising the same

A negative electrode active material including silicon-based active material particles each including a core including SiO, wherein 0≤x≤2, and a coating layer present on the core. Also, a negative electrode active material in which the coating layer is any one of a carbon coating layer or a polymer coating layer, and the coating layer includes a fluorinated material including at least one of an alkali metal or an alkaline earth metal.

Negative electrode active material, negative electrode including negative electrode active material, and secondary battery including negative electrode

A method for training an analysis model according to an embodiment includes receiving synthetic data for original data from a client apparatus, determining a hyperparameter value for analysis model training using the synthetic data, receiving a ciphertext for the original data from the client apparatus, and training the analysis model using the determined hyperparameter value and the received cipher text.

Method and apparatus with ciphertext training analysis model

A negative electrode active material as well as a method of preparing a negative electrode active material which includes preparing a silicon-based compound including SiO, wherein 0.5<x<1.3; disposing a polymer layer including a polymer compound on the silicon-based compound; disposing a metal catalyst layer on the polymer layer; heat treating the silicon-based compound on which the polymer layer and the metal catalyst layer are disposed; and removing the metal catalyst layer, wherein the polymer compound includes any one selected from the group consisting of glucose, fructose, galactose, maltose, lactose, sucrose, a phenolic resin, a naphthalene resin, a polyvinyl alcohol resin, a urethane resin, polyimide, a furan resin, a cellulose resin, an epoxy resin, a polystyrene resin, a resorcinol-based resin, a phloroglucinol-based resin, a coal-derived pitch, a petroleum-derived pitch, a tar and a mixture of two or more thereof.

Negative electrode active material, negative electrode including the negative electrode active material, secondary battery including the negative electrode, and method of preparing the negative electrode active material

A silicon-carbon complex comprising carbon-based particles and silicon-based particles, wherein the silicon-based particles are dispersed and positioned on surfaces of the carbon-based particles, the carbon-based particles have a specific surface area of 0.4 m/g to 1.5 m/g, and the silicon-based particles are doped with one or more elements selected from the group consisting of Mg, Li, Ca, and Al, and a negative electrode active material for lithium secondary battery comprising the same.

Silicon-carbon complex and lithium secondary battery comprising the same

The present specification relates to a negative electrode active material which includes a silicon-based composite represented by SiO(0&#x2264;a&#x3c;1), and a carbon coating layer distributed on a surface of the silicon-based composite, and which has a bimodal pore structure including nanopores and mesopores. In a lithium secondary battery including the negative electrode active material, an oxygen content in the silicon-based composite can be controlled to improve initial efficiency and capacity characteristics, and a specific surface area can also be controlled, and thus a side reaction with electrolyte can be reduced.

Negative electrode active material for lithium secondary battery and method of preparing the same

A negative electrode for a lithium secondary battery and a lithium secondary battery including the negative electrode are disclosed. The negative electrode includes a negative electrode current collector, a first negative electrode active material layer present on the negative electrode current collector, and a second negative electrode active material layer present on the first negative electrode active material layer. The first negative electrode active material layer includes two or more kinds of first negative electrode active materials, and the second negative electrode active material layer includes a second negative electrode active material having swelling that is smaller than that of the first negative electrode active material layer. Therefore, the surface of the negative electrode does not exhibit deformation during pre-lithiation.

A negative electrode active material for a lithium secondary battery, including: first negative electrode active material particles including first artificial graphite particles and a carbon coating layer on a surface of the first artificial graphite particles, wherein the carbon coating layer comprises hard carbon; and second negative electrode active material particles including second artificial graphite particles, wherein a difference between an average particle diameter Dof the first negative electrode active material particles and an average particle diameter Dof the second negative electrode active material particles is 5 &#x3bc;m or less, and a temperature at an exothermic peak in differential thermogravimetric analysis of the carbon coating layer is in a range of 580&#xb0; C. to 690&#xb0; C.

Negative electrode active material for lithium secondary battery, method of preparing the same, and negative electrode for lithium secondary battery and lithium secondary battery including the same

Growing community of inventors

Daejeon, South Korea

Eun Kyung Kim