Lg Chem, Ltd

Lg Energy Solution, Ltd.

Other

Sun Young Shin

Eun Kyung Kim

Su Min Lee

Oh Byong Chae

Yong Ju Lee

Hyun Wook Kim

Su Yeon Lee

Je Young Kim

Sang Wook Woo

Yoon Ah Kang

Se Mi Park

Lilin Piao

Dong Hyuk Kim

Jung Woo Yoo

Dong Sub Jung

Jung Hyun Choi

Hang Ah Park

Tae Gon Kim

Byung Hun Oh

Ye Lin Kim

Su Jin Park

Il Geun Oh

Su-Min Lee

Chang Ju Lee

Hyeon Min Song

So Ra Lee

Se Hui Sohn

Jee Eun Kim

Seo Young Kwon

Semi Park

Ilgeun Oh

Jae Young Lee

Hyun Min Jun

Provided is a negative electrode active material which includes: a silicon-based core; and an outer coating layer formed on the silicon-based core and including polyimide, wherein the polyimide comprises a fluorine-containing imide unit. The outer coating layer may be included in an amount of more than 0 wt % and 4.5 wt % or less in the negative electrode active material.

Negative electrode active material, and negative electrode and secondary battery including the same

A negative electrode active material including: silicon-containing composite particles including SiO(0<x<2) and pores; and a carbon layer on a surface of the silicon-containing composite particles and in the pores, in which the carbon layer includes a metal, the metal includes at least one selected from the group consisting of Li, Na and K, and the pores have an average diameter in a range of 2 nm to 45 nm, a negative electrode including the same, a secondary battery including the negative electrode and a method for preparing the negative electrode active material.

Negative electrode active material, negative electrode including negative electrode active material, secondary battery including negative electrode, and method for preparing negative electrode active material

The present invention relates to: a negative electrode active material including silicon-based composite particles containing SiO(0<x<2) and a MgSiOphase, wherein the MgSiOphase includes a first MgSiOphase having an enstatite structure and a second MgSiOphase having a clinoenstatite structure at a weight ratio of 1:1 to 1:5; a negative electrode including the same; and a secondary battery including the negative electrode.

Negative electrode active material, negative electrode including the negative electrode active material, and secondary battery including the negative electrode

The present invention relates to a negative electrode active material including a silicon-based composite and a carbon-based material, wherein the silicon-based composite includes SiO(0&#x2264;x&#x2264;2) including pores, a polymer disposed in the pores, and a metal compound disposed on a surface of the SiO(0&#x2264;x&#x2264;2) or on the surface and inside of the SiO(0&#x2264;x&#x2264;2), wherein the metal compound is a compound including at least one element selected from the group consisting of lithium (Li), magnesium (Mg), calcium (Ca), and aluminum (Al), a method of preparing the same, and a negative electrode and a lithium secondary battery which include the negative electrode active material.

Negative electrode active material, method of preparing the same, and negative electrode and lithium secondary battery which include the negative electrode active material

An LED stroboscope device synchronized with a camera, which comprises: a power supply unit; a stroboscope unit which receives power from the power supply unit so as to charge the power for generating a flashing light, and then, outputs a flashing light generation signal for electric discharge of the charged power; a continuous light unit which receives the power from the power supply unit so as to output a continuous light generation signal for generating continuous light; a light emitting unit which individually receives the flashing light generation signal and the continuous light generation signal so as to generate the flashing light and the continuous light; and a control unit which receives the power from the power supply unit so as to individually control the stroboscope unit and the continuous light unit, thereby outputting the flashing light generation signal and the continuous light generation signal.

Led stroboscope device synchronized with camera

An electrode for batteries that does not include a metal-film-type current collector is disclosed herein. In some embodiments, the electrode comprises a composite having a core-shell structure including a core having an electrode active material, and a metal material coated on or doped in the surface of the core. A secondary battery having the electrode has increased capacity and energy density and exhibits improved lifespan characteristics.

Electrode having no current collector and secondary battery including the same

The present invention relates to a composite negative electrode material for a secondary battery, and a negative electrode and a lithium secondary battery which include the same, and particularly to a composite negative electrode material for a secondary battery, which includes a graphene sheet, and two or more coating layers formed on both sides of the graphene sheet, wherein the two or more coating layers include at least one polymer coating layer and at least one pitch coating layer, and the graphene sheet and the two or more coating layers are included in a weight ratio of greater than 1:greater than 0.01 to less than 0.1, and a negative electrode and a lithium secondary battery which include the same.

Composite negative electrode material for secondary battery, and negative electrode and lithium secondary battery including the same

Since a surface of the artificial graphite of the negative electrode active material according to the present invention is modified with nitrogen, dispersibility in an aqueous system may be improved and accordingly, affinity between a binder and the negative electrode active material is increased to increase the adhesive strength of an electrode. Also, since the surface of the artificial graphite is modified with nitrogen, there is an effect of maintaining a high battery capacity. Furthermore, in the method of preparing a negative electrode active material according to the present invention, since an oxygen-containing functional group is connected to the artificial graphite by a mild oxidation process, the nitrogen may be easily attached to the artificial graphite so that the negative electrode active material becomes an electrical conductor by maintaining original crystallinity while having a hydrophilic property. Thus, excellent battery efficiency may be achieved.

Negative electrode active material and method of preparing the same

A negative electrode according to one embodiment of the present invention comprises a current collector and a negative electrode active material layer disposed on the current collector, wherein the negative electrode active material layer includes a first particle and a second particle, the first particle includes a first core including artificial graphite; and a first shell disposed on the first core, said first shell including an oxide of the artificial graphite, wherein a sphericity of the first particle measured through a particle shape analyzer is from 0.94 to 0.98, the second particle is artificial graphite having sphericity measured through the particle shape analyzer of 0.70 to 0.92, and a weight ratio of the first particle and the second particle is from 1:1 to 1:9.

Negative electrode and method for preparing negative electrode

The present invention relates to an anode active material including natural graphite and mosaic coke-based artificial graphite, and a lithium secondary battery including the same. According to an embodiment of the present invention, an anode active material including natural graphite and mosaic coke-based artificial graphite is used, when applied to a lithium secondary battery, intercalation and deintercalation of lithium ions is more facilitated and conductivity of an electrode is improved even if no or little conductive material is used. Furthermore, the increase in conductivity can lead to not only a further improvement in rate performance of a lithium secondary battery but also a reduction in interfacial resistance.

Anode active material and lithium secondary battery including the same

A method for manufacturing an electrode for a lithium secondary battery having reinforced safety is provided. In some embodiments, the method includes spraying a first mixture on a surface of an active material layer to form an insulating layer, wherein the insulating layer is a porous film and consists of a polymer or consists of the polymer and a first binder material, spraying a second mixture on the insulating layer to form a safety reinforcing layer, wherein the safety reinforcing layer consists of the second binder material and the inorganic oxide, and spraying a third mixture comprising microfilaments and a third binder material on the safety reinforcing layer to form an impregnation property improving layer, wherein a weight ratio of the microfilaments to the third binder material ranges from 10:90 to 30:70, and wherein the microfilaments have diameters of 0.1 to 10 &#x3bc;m and lengths of 50 to 500 &#x3bc;m.

Preparing method of electrode for lithium secondary battery, electrode for lithium secondary battery prepared thereby and lithium secondary battery comprising the same

The present invention relates to a negative electrode active material comprising a mixture of a first negative electrode active material and a second negative electrode active material, wherein the first negative electrode active material has a hardness of 1 kg/mmto 10 kg/mmon the basis of the Vickers hardness standard, and the second negative electrode active material has a higher hardness than the first negative electrode active material. The negative electrode active material according to the present invention comprises a mixture of negative electrode active materials having different hardness so that pores of an active material layer are maintained in spite of a rolling process at the time of producing an negative electrode, and the pores acting as an electrolyte flow passage of an electrode can effectively be secured, thereby producing a lithium secondary battery having excellent battery performance by lowering resistance when a battery is charged or discharged.

Negative electrode active material and lithium secondary battery comprising the same

A charging and discharging method for a lithium secondary battery is provided, wherein, while charging or discharging the lithium secondary battery using a constant current, the charge current or allowable discharge current is modified by measuring the internal resistance of the lithium secondary battery. In the charging and discharging method for a lithium secondary battery according to the present disclosure, the charging time and charge capacity, or the discharge current amount and discharge capacity, may be appropriately harmonized, and thus the method may be usefully used as a charging method and a discharging method for a lithium secondary battery.

Constant-current charging and discharging method for lithium secondary battery by controlling current based on internal resistance measurement

The present invention relates to a negative electrode and a secondary battery including the same, and particularly, to a negative electrode which includes a negative electrode active material layer including first active material particles each in the form of a secondary particle in which a plurality of primary particles are agglomerated; and second active material particles, wherein the second active material particles have an average particle size (D) equal to or less than an average particle size (D) of the primary particles, the first active material particle is artificial graphite, and the second active material particle is a graphite-based particle, and a secondary battery, a battery module, and a battery pack including the same.

Negative electrode, and secondary battery, battery module, and battery pack including the same

Provided is a metal mesh foil for a current collector of a lithium secondary battery having a hydrophobic deposition layer formed on a surface thereof, wherein the hydrophobic deposition layer is a deposition layer, in which a hydrophobic material is deposited, and has a thickness of 1 &#x212b; to 100 &#x212b;.

Metal mesh foil for current collector of lithium secondary battery, electrode for lithium secondary battery and lithium secondary battery comprising the same

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Daejeon, South Korea

Sun Young Shin