Lg Chem, Ltd

Ulsan National Institute of Science and Technology

Unist, Inc.

Jang-Bae Kim

Byoung-Bae Lee

Ji-Hye Yang

Jong-Hyun Chae

Soo-Jin Park

Kyoung-Ho Kim

Sang-Kyun Lee

Su-Hwan Kim

Bok-Kyu Choi

Bong-Hyun Jeong

Eui-Yong Hwang

Jae-Geon Ryu

Dong-Ki Hong

The present disclosure relates to a negative electrode material including, as an active material, silicon flakes with a hyperporous structure, represented by the following chemical formula 1:Si.(1&#x2212;)A&#x2003;&#x2003;(1)

Negative electrode material comprising silicon flakes and preparing method of silicon flakes

A secondary battery using a vanadium oxide as a positive electrode active material is provided. The secondary battery is prevented from degradation of capacity by preventing dissolution of vanadium. The vanadium oxide includes secondary particles formed by assemblage of primary particles.

Lithium ion secondary battery

The present disclosure relates to a method for prelithiation, and in particular, to a method for prelithiation that predopes lithium into at least one unit cell uniformly in large amounts. According to an aspect of the present disclosure, there is provided a method for prelithiation including an preparing at least one unit cell, the unit cell comprising a cathode, an anode, and a separator interposed between the cathode and the anode, disposing the prepared at least one unit cell in a reaction tank, and connecting electrodes having the same polarity, adding an electrolyte solution into the reaction tank, disposing a lithium metal plate in the electrolyte solution, and connecting the lithium metal plate to the anode, and doping the anode.

Method for prelithiation, method for fabricating lithium secondary battery comprising the method, and lithium secondary battery fabricated from the fabricating method

The present disclosure relates to an anode active material-containing slurry, an anode using the slurry, and an electrochemical device comprising the anode. More specifically, the present disclosure relates to a slurry comprising an anode active material; a polymer binder comprising styrene butadiene rubber and potassium polyacrylate; a conductive material; and a dispersing medium, an anode using the slurry, and an electrochemical device comprising the anode. The anode active material-containing slurry according to one aspect of the present disclosure can relieve the volume expansion of an anode active material by the intercalation and disintercalation of lithium during cycles of electrochemical devices to improve the durability of an anode active material layer, thereby enhancing the life characteristics of the electrochemical devices, and can form an anode active material layer having a high peeling force even though potassium polyacrylate with a relatively lower weight-average molecular weight is used.

Anode active material-containing slurry, anode using the slurry and electrochemical device comprising the anode

The present disclosure relates to a binder solution for an anode, comprising a thermally cross-linkable polymer binder that is cross-linked by heat, and a solvent for dissolving the thermally cross-linkable polymer binder, and exhibiting a concentration of hydrogen ions corresponding to pH 2.5 to pH 4.5; an active material slurry for an anode, comprising the binder solution; an anode using the slurry; and an electrochemical device comprising the anode. The binder solution for an anode according to one aspect of the present disclosure can relieve the volume expansion of an anode active material by the intercalation and disintercalation of lithium during cycles of electrochemical devices to improve the durability of an anode active material layer, thereby enhancing the life characteristics of the electrochemical devices, and also can provide good dispersibility to the active material slurry for an anode, thereby improving the coating stability of an anode active material layer.

Binder solution for anode, active material slurry for anode comprising the binder solution, anode using the slurry and electrochemical device comprising the anode

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Daejeon, South Korea

Jang-Bae Kim