Lg Energy Solution, Ltd.

Postech Academy-industry Foundation

Jihoon Ahn

Jonghyun Chae

Taek Gyoung Kim

Daeil Kim

Sung Chul Lim

Suhwan Kim

Suenghoon Han

Bong Soo Kim

Yun Kyoung Kim

Moon Jeong Park

Eun Kyoung Park

Dong Hyeop Han

Ha Young Jung

Disclosed is a positive electrode for a lithium-sulfur battery, including a current collector; and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer includes a positive electrode active material and a binder, and the positive electrode active material layer has surface properties defined by the following S(arithmetic mean surface roughness of the positive electrode) and S(maximum height roughness of the positive electrode) ((i) 1 μm≤S≤5 μm, (ii) 10 μm≤S≤60 μm (wherein Sis the average value of the distance from the middle surface of the surface irregularity structure of the positive electrode to the highest point and the lowest point of each irregularity part, and Smeans the distance from the lowest point to the highest point of the positive electrode)) and a method for manufacturing the same.

Positive electrode for lithium-sulfur battery and method for manufacturing same

Disclosed is a modified iron oxyhydroxynitrate including iron oxyhydroxynitrate and hydrogen phosphate ions adsorbed on a surface thereof. Also disclosed is a method for preparing the same, a positive electrode for a lithium secondary battery including the modified iron oxyhydroxynitrate as a positive electrode additive, and a lithium secondary battery including the same.

Iron oxyhydroxynitrate having phosphoric acid anion-adsorbed surface, preparation method therefor, cathode comprising iron oxyhydroxynitrate having phosphoric acid anion-adsorbed surface for lithium secondary battery, and lithium secondary battery comprising same

A solid polymer electrolyte and a method for preparing the solid polymer electrolyte are disclosed. More particularly, a solid polymer electrolyte including a multifunctional acrylate-based polymer, a C1 to C10 polyalkylene oxide, a flame-retardant polymer, a lithium salt, and a non-aqueous solvent, wherein the multifunctional acrylate-based polymer is cross-linked with the polyalkylene oxide to form semi-interpenetrating polymer networks (semi-IPN), and the flame-retardant polymer is present blended with the semi-interpenetrating polymer networks of the multifunctional acrylate-based polymer and the polyalkylene oxide, which shows high solid content and flame-retardant characteristics, and a method for preparing the same.

Solid electrolyte, method for preparing same, and all-solid-state battery including same

A polymer electrolyte is provided, which includes a polymer including an ethylene oxide unit; and a lithium salt, wherein the terminal of the polymer is substituted with one to four functional groups selected from the group consisting of a nitrogen compound functional group and phosphorus compound functional group, and the terminal of the polymer and the one to four functional groups are linked by one selected from the group consisting of a C2 to C20 alkylene linker, a C2 to C20 ether linker, and a C2 to C20 amine linker. A method for preparing the same is also provided.

Polymer electrolyte and method for producing same

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Daejeon, South Korea

Jihoon Ahn