Lg Chem, Ltd

Lg Energy Solution, Ltd.

Other

Lg Electronics Inc.

Unist-academy Industry Research Corporation

Yoon Ah Kang

Je Young Kim

Yong Ju Lee

Eun Kyung Kim

Oh Byong Chae

Sang Wook Woo

Jun Hyuk Song

Mi Rim Lee

Jung Woo Yoo

Rae Hwan Jo

Hye Ran Jung

Ki Hwan Kim

Sun Young Shin

Jin Hyong Lim

Hyun Chul Kim

Hoon Jeong

Sang Hyun Lee

Jin Soo Kim

Min Joo Kim

Ki Tae Kim

Jeong Hyuk Yoon

Hye Youn Cho

Min Soo Park

Dong Sub Jung

Chae-Ok Yun

Jae Phil Cho

Sangwook Woo

Seung Youn Choi

Hyo Jin Suh

Hye Eun Shin

Jung In Lee

Hang Jun Cho

Se Il Hwang

Soo Jin Park

Joo-Hang Kim

Hyun Chul Shin

A method of preparing a negative electrode for a lithium secondary battery, which includes forming a negative electrode mixture layer including a negative electrode active material on a negative electrode current collector, disposing lithium metal powder on at least a part of the negative electrode mixture layer, pressing the negative electrode mixture layer on which the lithium metal powder is disposed, wetting the pressed negative electrode mixture layer with a first electrolyte solution, and drying the wet negative electrode mixture layer. A battery including the negative electrode of the present invention has enhanced rapid charge/discharge characteristics and enhanced lifespan characteristics.

Method of preparing negative electrode for lithium secondary battery

The present invention relates to a negative electrode for a secondary battery which comprises a negative electrode collector, a negative electrode active material layer formed on the negative electrode collector, and a lithium metal layer, wherein an adhesive layer is disposed between the negative electrode active material layer and the lithium metal layer, and the lithium metal layer comprises lithium and metal oxide in a weight ratio of 50:50 to 99:1.

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

A method for pre-lithiating a silicon oxide negative electrode for a secondary battery, specifically a method for pre-lithiation by immersing the silicon oxide negative electrode in an electrolytic solution for wetting, and by applying pressure while a lithium metal is in direct contact with the wetted silicon oxide negative electrode. The silicon oxide negative electrode for a secondary battery manufactured through pre-lithiation provided in the present disclosure has improved initial irreversibility, and a secondary battery manufactured using such a silicon oxide negative electrode for a secondary battery has excellent charge/discharge efficiency.

Pre-lithiation method of silicon oxide anode electrodes for secondary battery

A negative electrode for a lithium secondary battery, which includes a negative electrode active material layer formed on a negative electrode collector, and a coating layer formed on the negative electrode active material layer and which includes lithium metal and metal oxide, a lithium secondary battery including the same, and a method of preparing the negative electrode.

A lithium secondary battery including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode, wherein the negative electrode is lithiated by pre-lithiation, a total capacity of a negative electrode active material of the negative electrode is larger than a total capacity of a positive electrode active material of the positive electrode, and a charge capacity of the negative electrode is smaller than a charge capacity of the positive electrode by the pre-lithiation.

Lithium secondary battery and method for preparing the same

A pre-lithiation apparatus that pre-lithiates a negative electrode structure having a first surface on which a negative electrode is disposed to produce a negative electrode unit of a battery, the apparatus includes a first roll rotatable to wind or unwind the negative electrode structure before the pre-lithiation is performed, a second roll installed to be spaced apart from the first roll and rotatable to wind and collect the negative electrode structure, on which the pre-lithiation is performed, and a lithium roll crossing a direction in which the negative electrode structure is transferred from the first roll to the second roll to come into contact with at least one of a first surface and a second surface of the negative electrode structure while being transferred from the first roll to the second roll. The lithium roll includes a lithium foil and an elastic member.

Pre-lithiation apparatus, method of producing negative electrode unit and negative electrode unit

A method for pre-lithiation of a negative electrode and a negative electrode formed by the method, the method including forming a mixture of inorganic material powder and molten lithium, forming a lithium metal-inorganic material composite ribbon, rolling the ribbon into a film and bonding the lithium metal-inorganic material composite film on a surface of a negative electrode to form a lithium metal-inorganic material composite layer on the surface of the negative electrode. This method reduces the deterioration of lithium during application of a mixture slurry and a negative electrode for a secondary battery, manufactured by the method for pre-lithiation, has improved initial irreversibility, and a secondary battery manufactured using such a negative electrode has excellent charging and discharging efficiency.

Method for forming lithium metal and inorganic material composite thin film and method for pre-lithiation of negative electrode for lithium secondary battery by using same

A method of pre-lithiating a negative electrode for a secondary battery, including: dispersing a lithium metal powder, an inorganic material powder and a binder in a solvent to prepare a mixed solution; and applying the mixed solution to the negative electrode to form a lithium metal-inorganic composite layer on the negative electrode, thereby forming the pre-lithiated negative electrode. Also, a method for pre-lithiating a negative electrode having a high capacity by a simple process. Further, a negative electrode for a secondary battery manufactured through the pre-lithiation method provided in the present invention has an improved initial irreversibility, and secondary batteries manufactured using such a negative electrode for a secondary battery have excellent charge/discharge efficiency.

Pre-lithiation using lithium metal and inorganic composite layer

A method of pre-lithiating an electrode for a secondary battery, the method including: a first step of bringing a lithium metal into direct contact with an electrode in an electrolyte and applying pressure to the electrode to prepare a pre-lithiated electrode; and a second step of removing the lithium metal and then applying pressure to the pre-lithiated electrode to perform a stabilization process. The electrode for the secondary battery after going through the pre-lithiation can relieve volume change of the electrode and reduce contact loss of the electrode.

Pre-lithiation method of negative electrode for secondary battery

A negative electrode active material of the present invention includes a core containing silicon-based nanoparticles and polymer carbides distributed on the nanoparticles, wherein the core has a size of 30-300 nm, and such a negative electrode active material is prepared using a method including dispersing a suspension in which silicon-based nanoparticles and water-soluble polymer are added to a solvent using ultrasonic waves; and preparing a core including the silicon-based nanoparticles having the polymer carbides on the surface by carbonizing the water-soluble polymer. As a result, a negative electrode active material having a significantly low volume expansion rate compared with general non-carbon-based negative electrode active materials, and having excellent electric conductivity may be provided.

Silicon-based negative electrode active material and method for preparing the same

Provided is an electrode for a lithium secondary battery in which a hygroscopic material is disposed in pores which are formed by arranging an active material in an active material layer, wherein, since the electrode for a lithium secondary battery according to the present invention may remove moisture present in the electrode and an electrolyte solution by disposing the hygroscopic material in the pores which are formed by the active material in the active material layer, a side reaction due to the presence of moisture in the battery may be excluded, and thus, the performance of the battery may be improved.

Electrode for lithium secondary battery comprising hygroscopic material and lithium secondary battery comprising the same

Provided are a composite for an anode active material and a method of preparing the same. More particularly, the present invention provides a composite for an anode active material including a (semi) metal oxide and an amorphous carbon layer on a surface of the (semi) metal oxide, wherein the amorphous carbon layer comprises a conductive agent, and a method of preparing the composite.

Composite for anode active material and method of preparing the same

Provided are a negative electrode active material including spherical artificial graphite and natural flake graphite, wherein the spherical artificial graphite and the natural flake graphite are included in a weight ratio of 80:20 to 95:5, and a negative electrode for a lithium secondary battery including the same.

Negative electrode active material and negative electrode for secondary battery comprising the same

Provided are an anode active material including a porous silicon oxide-carbon material composite which includes a porous silicon oxide including pores and a line-type carbon material coated on a surface, in the pores, or on the surface and in the pores of the porous silicon oxide, and a method of preparing the anode active material. Since the silicon oxide of the anode active material according to an embodiment of the present invention may include the plurality of pores, resistance to the mechanical stress due to a volume change may be improved. Also, since the line-type carbon material is bonded to the inside of the pores, conductivity may not be decreased even in the case in which internal cracks occur in the porous silicon oxide and lifetime characteristics may be improved.

Anode active material including porous silicon oxide-carbon material composite and method of preparing the same

Disclosed herein is an electrode active material for a secondary battery, and more particularly to an electrode active material comprising a porous silicon oxide-based composite and the method for preparing a porous silicon oxide-based composite.

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Daejeon, South Korea

Yoon Ah Kang