Lg Energy Solution, Ltd.

Chung Ang University Industry Academic Cooperation

Lg Chem, Ltd

Yeilin Ham

Minchul Jang

Byoungkuk Son

Eunkyung Park

Da Young Sung

Suk Il Youn

Bora Jung

Changhun Park

Doyeon Kim

Minehul Jang

Myung Gil Kim

A lithium secondary battery including a positive electrode, a negative electrode comprising a negative electrode current collector, and an electrolyte disposed between the positive electrode and the negative electrode; and a lithium metal layer on the negative electrode current collector in the negative electrode. The electrolyte includes a first electrolyte layer and a second electrolyte disposed on the first electrolyte layer, wherein the first electrolyte layer faces the negative electrode, and the second electrolyte layer faces the positive electrode. The first electrolyte layer has higher ion conductivity than the second electrolyte layer, and wherein the lithium metal layer is formed by migration of lithium ions from the positive electrode after charging.

Lithium secondary battery

A lithium secondary battery including a negative electrode, a positive electrode, a first electrolyte layer facing the negative electrode; and a second electrolyte layer present on the first electrolyte layer, wherein the first electrolyte layer has a higher ion conductivity than the second electrolyte layer, and a lithium secondary battery comprising the electrolyte described above.

Electrolyte having differential ion conductivity and lithium secondary battery comprising same

A method for preparing a positive electrode active material, a positive electrode active material prepared using the same, and a lithium secondary battery, and in particular, to a method for preparing a positive electrode active material comprising the steps of (a) preparing a coating composition including a precursor of metal-phosphorous-oxynitride; (b) forming a precursor layer on a positive electrode active material with the coating composition of (a) using a solution process; and (c) forming a metal-phosphorous-oxynitride protective layer on the positive electrode active material by heat treating the positive electrode active material having the precursor layer formed thereon. The method for preparing a positive electrode active material uses a solution process, which is advantageous in terms of simplifying the whole process and reducing costs, and high capacity, high stabilization and long lifetime are obtained as well by the formed protective layer having excellent properties.

Method for manufacturing positive active material, and positive active material and lithium secondary battery using same

A porous separator including a porous layer including plate-type inorganic particles, and a first binder polymer located on a part of or all surfaces of the plate-type inorganic particles, wherein the first binder polymer connects and fixes the plate-type inorganic particles, and an electrochemical device including the same.

Porous separator including porous layer including plate-type inorganic particles and porous coating layer including spherical inorganic particles and electrochemical device including the same

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Daejeon, South Korea

Yeilin Ham