Lg Chem, Ltd

Lg Energy Solution, Ltd.

Yoon-Ah Kang

Je-Young Kim

Yong-Ju Lee

Hye-Ran Jung

Sang-Wook Woo

Eun-Kyung Kim

Oh-Byong Chae

Mi-Rim Lee

Jun-Hyuk Song

Jung-Woo Yoo

Geun-Sik Jo

Seung-Youn Choi

Soo-Hee Kang

So-Young Choo

A method for pre-lithiation of a negative electrode is disclosed, including the steps of: producing a lithium metal laminate which includes i) lithium metal foil; and ii) a buffer layer including carbonaceous material particles, inorganic compound particles, polymer compound particles or their combination, and coated on one surface of the lithium metal foil; producing a negative electrode including a negative electrode current collector, and a negative electrode active material layer formed on at least one surface of the negative electrode current collector; and laminating the lithium metal laminate with the negative electrode in such a manner that the buffer layer of the lithium metal laminate is in contact with the negative electrode active material layer. A lithium metal laminate used for the method is also provided. The pre-lithiation of a negative electrode that includes a buffer layer reduces the problem of rapid volumetric swelling occurring.

Method for pre-lithiation of negative electrode for lithium secondary battery and lithium metal laminate used therefor

A method for patterning a lithium metal surface, including the steps of (S1) forming an intaglio or relief pattern having a predetermined size on a patterning substrate; (S2) either (a) compressing lithium metal physically to a surface of the patterning substrate having the pattern formed thereon to form the predetermined pattern on the surface of the lithium metal, or (b) applying liquid lithium to the surface of the patterning substrate having the pattern formed thereon and solidifying the liquid lithium to form the predetermined pattern on the surface of the lithium metal; and (S3) separating the lithium metal having the predetermined pattern formed thereon from the patterning substrate, wherein the patterning substrate is at least one selected from a silicon wafer or polycarbonate substrate.

Method for patterning lithium metal surface and electrode for lithium secondary battery using the same

An anode active material and a method for preparing the same, wherein the anode active material has a core-shell structure having formula (MOx-Liy)-C (here, M is a metal (or metalloid), x is greater than 0 and less than 1.5, and y is greater than 0 and less than 4) and including a core part containing an alloy of a metal (or metalloid) oxide-Li (MOx-Liy) and a shell part containing a carbon material coated on a surface of the core part, wherein the shell part contains lithium in an amount less than 5 atm % in the surface and the inner portion thereof. The anode active material can provide high capacity, excellent cycle characteristics, excellent volume expansion control capability, and high initial efficiency.

Anode active material with a core-shell structure, lithium secondary battery comprising same, and method for preparing anode active material with a core-shell structure

The anode active material of the present invention comprises silicon-based particles obtained from at least one of silicon, a silicon oxide and a silicon alloy, and the silicon-based particles have a faceted shape, thereby providing high capacity and good life characteristics without causing any deterioration which has been generated in the use of conventional silicon-based particles, and eventually providing a lithium secondary battery having such characteristics.

Anode active material for lithium secondary battery and lithium secondary battery comprising the same

The present disclosure relates to an anode active material comprising a composite of a core-shell structure, a lithium secondary battery comprising the same, and a method of manufacturing the anode active material. According to an aspect of the present disclosure, there is provided an anode active material of a core-shell structure comprising a core including alloyed (quasi)metal oxide-Li (MO&#x2014;Li) and a shell including a carbon material coated on a surface of the core. According to another aspect of the present disclosure, there is provided a method of manufacturing the anode active material of the core-shell structure. According to an aspect of the present disclosure, an anode active material with high capacity, excellent cycle characteristics and volume expansion control capacity, and high initial efficiency is provided.

Anode active material, lithium secondary battery comprising the same, and method of manufacturing anode active material

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Daejeon, South Korea

Yoon-Ah Kang