Lg Chem, Ltd

Lg Energy Solution, Ltd.

Youngcheol Choi

Kyoung Hoon Kim

Minchul Jang

Jonghyun Chae

Daeil Kim

Lucia Kim

Yeonju Lee

Seungha Kim

Doo Kyung Yang

Hyuk Joo Kim

Soohyun Kim

Byoungkuk Son

Sangwoo Lee

Junghun Choi

Tae Geun Noh

Intae Park

Doyoung Kim

Seong Ho Choi

Sung Chul Lim

InSung Uhm

Hye Sung Cho

Changhoon Lee

Minkyu Min

Chanyeup Chung

Hye Mi Kim

Kyunga Sung

The present disclosure provides an irreversible additive contained in a cathode material for a secondary battery, wherein the irreversible additive is an oxide represented by the following chemical Formula 1, and wherein the oxide has a trigonal structure, a cathode material including the irreversible additive, and a secondary battery including the cathode material:LiNiMOO  (1)

Irreversible additive comprised in cathode material for secondary battery, cathode material comprising the same, and secondary battery comprising cathode material

A lithium-sulfur secondary battery comprising a positive electrode, a negative electrode, a separator, and an electrolyte solution are provided. The positive electrode has an SC factor value of 0.45 or more. The electrolyte solution includes a solvent and a lithium salt, and the solvent includes a first solvent having a DVfactor value of 1.7 or less, and a second solvent which is a fluorinated ether-based solvent.

Lithium-sulfur secondary battery

A polymer solid electrolyte having high ion conductivity, heat resistance and dimensional stability, and having excellent oxidation stability and voltage stability, and a lithium secondary battery including the same.

Polymeric solid electrolyte and lithium secondary battery comprising same

A negative electrode including an electrode protective material and a lithium secondary battery including the negative electrode, wherein the negative electrode containing the protective material can inhibit the growth of lithium dendrite on the surface of the electrode, effectively transfer lithium ions to the lithium metal electrode and has an excellent ion conductivity, and thus the protective layer itself including the protective material does not act as a resistive layer, overvoltage is not applied during charging and discharging, thereby preventing degradation of the performance of the battery and ensuring stability when driving the battery.

Negative electrode containing electrode protective layer and lithium secondary battery comprising the same

A polymer solid electrolyte having high ion conductivity and interfacial stability is provided. An additive including an organic compound having a highest occupied molecular orbital (HOMO) energy of &#x2212;8.5 eV or higher is used, which facilitates film formation in a positive electrode due to low oxidation potential. The resulting polymer solid electrolytes have enhanced film formation on the surface of a positive electrode surface and enhanced interfacial stability, while maintaining battery performance. Lithium secondary battery having enhanced performance are also described.

Polymer solid electrolyte and lithium secondary battery comprising same

Provided are a polymer electrolyte composition, an electrolyte membrane, a membrane electrolyte assembly, and a fuel cell. The polymer electrolyte composition according to an exemplary embodiment of this application includes a first solvent, a second solvent which is different from the first solvent, and a polymer which is reacted with the first solvent and the second solvent, in which the polymer includes a functional group which reacts with the first solvent by a first reaction energy and with the second solvent by a second reaction energy, and the second reaction energy is smaller than the first reaction energy.

Polymer electrolyte composition, electrolyte membrane, membrane-electrode assembly and fuel cell

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Daejeon, South Korea

Youngcheol Choi