Lg Chem, Ltd

Lg Energy Solution, Ltd.

YoHan Kwon

Je Young Kim

Sung-Kyun Chang

Seung-Tae Hong

Minchul Jang

Jae Hyun Lee

Byoungkuk Son

Eunkyung Park

Young Jae Kim

SungJin Kim

Su Jin Park

Sung Chul Lim

InSung Uhm

Ilhong Kim

Taegon Kim

Jaewook Lee

Seongmin Ha

Chan Soo Jun

ByungHun Oh

Seoyoung Jeon

A secondary battery according to an embodiment of the present disclosure is a secondary battery including a cathode in which a cathode material is applied onto a cathode current collector, wherein the cathode material includes an irreversible additive and a cathode active material, and the irreversible additive includes lithium nickel oxide (LNO) having a trigonal crystal structure within an operating range from 3.0 V or more to 4.0 V or less in the secondary battery.

Secondary battery including cathode material including irreversible additive, and method for manufacturing the same

Disclosed is a negative electrode composition, a negative electrode for a lithium secondary battery, including the same, and a lithium secondary battery including the negative electrode, and a method for preparing a negative electrode composition.

Negative electrode for lithium secondary battery, lithium secondary battery comprising negative electrode, and method for preparing negative electrode for lithium secondary battery

A lithium secondary battery including a positive electrode, a negative electrode comprising a negative electrode current collector, and an electrolyte interposed between the positive electrode and negative electrode. The lithium metal is formed on the negative electrode current collector by lithium ions migrating toward the negative electrode current collector after charge. The electrolyte comprises a sacrificial salt having an oxidation potential of 5 V or less with respect to lithium. The lithium secondary battery forms lithium metal while being blocked from the atmosphere, and thereby improves an existing problem caused by high reactivity of lithium metal. By including a sacrificial salt in an electrolyte, lithium consumption caused by an irreversible reaction of a negative electrode is reduced, which may prevent decline in the battery capacity and lifetime properties.

Lithium secondary battery

Disclosed herein is an integrated electrode assembly including a cathode, an anode, and a separation layer integrated between the cathode and the anode. The separation layer includes 3 phases including a liquid-phase component containing an ionic salt, which partially flows from the separation layer into the cathode and the anode during preparation of the integrated electrode assembly to increase ionic conductivity of the cathode and the anode, a solid-phase component supporting the separation layer between the cathode and the anode, and a polymer matrix having affinity for the liquid-phase component and providing binding force with the cathode and the anode.

Unification-typed electrode assembly and secondary battery using the same

Disclosed is a polymer electrolyte having a multilayer structure including a first polymer layer providing mechanical strength against external force and a second polymer layer to secure a conduction path for lithium ions, wherein the first polymer layer includes an organic electrolyte containing an ionic salt in an amount of 0 wt % to 60 wt % based on a weight of a polymer matrix of the first polymer layer and the second polymer layer includes an organic electrolyte containing an ionic salt in an amount of 60 wt % to 400 wt % based on a weight of a polymer matrix of the second polymer layer, and a lithium secondary battery including the same.

Polymer electrolyte and lithium secondary battery including the same

Disclosed herein is an integrated electrode assembly including a cathode, an anode, and a separation layer disposed between the cathode and the anode. The cathode, the anode, and the separation layer are integrated with each other. The separation layer includes 3 phases including a liquid-phase component containing an ionic salt, a solid-phase component supporting the separation layer between the cathode and the anode, and a polymer matrix in which linear polymers and cross-linked polymers form a viscoelastic structure with the liquid-phase component and the solid-phase component being incorporated in the polymer matrix. The polymer matrix is coupled to each of the cathode and the anode. The liquid-phase component of the separation layer flows into the electrodes (i.e., the cathode and anode) during preparation of the integrated electrode assembly to greatly improve wetting properties of the electrodes and to increase ionic conductivity of the electrodes.

Integrated electrode assembly and secondary battery using same

Disclosed is an integrated electrode assembly having a structure in which a cathode, an anode, and a separation layer disposed between the cathode and the anode are integrated with one another, wherein the separation layer has a multilayer structure including at least one two-phase electrolyte including a liquid phase component and a polymer matrix and at least one three-phase electrolyte including a liquid phase component, a solid component, and a polymer matrix, wherein the polymer matrices of the separation layer are coupled to the cathode or the anode and the liquid phase components of the separation layer are partially introduced into an electrode in a process of manufacturing the electrode assembly.

Electrode assembly having novel structure and secondary battery using the same

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Daejeon, South Korea

YoHan Kwon