Sk on Co., Ltd.

Mi Ryeong Lee

Hee Gyoung Kang

Jong Hyuk Lee

Gi Hyeon Moon

Hae Suk Hwang

So Hyun Park

Chan Young Jeon

The present disclosure relates to a negative electrode active material for a lithium ion secondary battery, a negative electrode, and a lithium ion secondary battery including the same. In the present disclosure, a crown ether-based host material which is a compound allowing selective coordination bonding with a lithium ion and having a similar cavity size to ions is included in the negative electrode active material, thereby suppressing lithium precipitation on the surface of the negative electrode active material to improve high rate charge/discharge characteristics of the battery, and also the crown ether-based host material solution is coated on the negative electrode active material layer of the battery to facilitate migration of lithium ions at high rate to improve an insertion/extraction speed of lithium ions during charge/discharge of the battery.

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

The lithium secondary battery includes a cathode which includes a cathode active material layer including a cathode current collector, a cathode tab protruding from one end thereof in a longitudinal direction of the cathode current collector, a second cathode portion disposed spaced apart from the cathode tab on the cathode current collector, and a first cathode portion disposed adjacent to the cathode tab on the cathode current collector and having an electrode density higher than that of the second cathode portion, and an anode disposed to face the cathode. Life-span characteristics of the lithium secondary battery may be improved by controlling the electrode density in the peripheral part of the cathode tab.

Lithium secondary battery

An electrode and a method of manufacturing the electrode are provided. The electrode includes an electrode current collector and an electrode active material layer on at least one surface of the electrode current collector. The electrode active material layer has a thickness of 200 μm or more, and when the electrode active material layer is divided into three portions of a surface layer portion, a middle layer portion, and a lower layer portion in a thickness direction, a difference in porosity between the surface layer portion and the lower layer portion by XRM analysis is 10% or less.

Electrode, secondary battery comprising electrode and method for preparing electrode

An anode active material for a secondary battery according to an embodiment of the present invention includes first particles serving as a core active material and second particles attached on surfaces of the first particles. A weight of the second particles based on 100 weight parts of a total weight of the first particles and the second particles satisfies a predetermined relation. A secondary battery including the anode active material is provided.

Anode active material for secondary battery, secondary battery including the same, and method of preparing the same

An electrode for a lithium secondary battery includes an electrode current collector, an electrode active material layer formed on at least one surface of the electrode current collector and including electrode active material particles, and a lithium salt-containing coating formed on at least portions of surfaces of the electrode active material particles or at least a portion of the surface of the electrode active material layer. The electrode for a lithium secondary battery may have a predetermined surface roughness.

Electrode for lithium secondary battery and lithium secondary battery including the same

Provided is a fabrication method of an electrode for a secondary battery including coating an electrode slurry containing an electrode active material and a binder on a current collector; drying the current collector on which the electrode slurry is coated to form an electrode active material layer; and surface-treating the electrode active material layer formed on the current collector to remove a binder layer on a surface of the electrode active material layer.

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Daejeon, South Korea

Mi Ryeong Lee