Lg Energy Solution, Ltd.

Lg Chem, Ltd

Lg Chem, Ld.

Hee Won Choi

Sang Wook Woo

Je Young Kim

Eun Kyung Kim

Li Lin Piao

Oh Byong Chae

Jae Wook Lee

Dong Sub Jung

Seung Youn Choi

Ki Hwan Kim

Dong Hyuk Kim

Jeong Woo Shon

Ju Ho Chung

Joo Yul Baek

Chan Ki Park

Yeon Ji Oh

Disclosed is a negative electrode including a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material and a conductive agent. The negative electrode active material includes carbon-based active material particles including natural graphite and an amorphous carbon-based material. The carbon-based active material particles have a specific surface area of 1.4 m/g to 2.3 m/g, and the conductive agent includes carbon nanotubes having an average length of 1 μm to 12 μm. A secondary battery including the negative electrode is also disclosed.

Negative electrode and secondary battery including the negative electrode

A negative electrode active material for a lithium secondary battery which includes first negative electrode active material particles including artificial graphite particles and a carbon coating layer formed on the artificial graphite particle; and second negative electrode active material particles including natural graphite particles, wherein the first negative electrode active material particles have a larger average particle diameter (D) than an average particle diameter (D) of the second negative electrode active material particles, and a weight ratio of the first negative electrode active material particles and the second negative electrode active material particles is in a range of 70:30 to 95:5.

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

A negative electrode active material for a secondary battery including: natural graphite particles; and a carbon coating layer on a surface and in an inside of the natural graphite particles. The negative electrode active material for a secondary battery has a porosity of 3% to 13%.

Negative electrode active material for secondary battery, method of producing the same, and negative electrode for secondary battery and lithium secondary battery including the same

A negative electrode including a negative electrode active material layer including a negative electrode active material, wherein the negative electrode active material includes a core and a coating layer disposed on the core. The core includes natural graphite and an amorphous carbon layer on the natural graphite, wherein the natural graphite has an average particle diameter, D, of 10 μm to 14 μm.ONH The negative electrode active material includes 1,500 ppm wt % to 2,000 ppm wt % of oxygen, 200 ppm wt % to 300 ppm wt % of nitrogen, and 200 ppm wt % to 300 ppm wt % of hydrogen as measured by an ONH analysis, and the coating layer includes carbon nanofibers.

A negative electrode for a secondary battery including: a negative electrode current collector; and a negative electrode active material layer present on the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material, wherein the negative electrode active material for a secondary battery includes natural graphite, and has a sphericity of 0.58 to 1, a tap density of 1.08 g/cc to 1.32 g/cc, and D−Dof 16 μm to 19 μm, wherein D−Dis a difference between a maximum particle diameter Dand a minimum particle diameter Din a particle size distribution.

Method of producing negative electrode active material for secondary battery, negative electrode for secondary battery, and lithium secondary battery including the same

A negative electrode and a secondary battery including the negative electrode. The negative electrode including a current collector and a negative electrode active material layer, wherein the negative electrode active material layer includes negative electrode active material particles, the negative electrode active material particles include natural graphite particles and a carbon coating layer disposed on the natural graphite particles. The negative electrode active material particles have a Dof 6 μm to 9.2 μm and a half-width of 5.0 μm to 5.5 μm based on a particle size distribution, and the specific surface area of the negative electrode active material particles is from 0.6 m/g to 2.2 m/g.

A negative electrode active material which includes a core including artificial graphite, and a carbon coating layer disposed on the surface of the core, wherein an edge plane of the negative electrode active material has a specific surface area of 1.0 m/g to 1.9 m/g, a negative electrode including the same, and a secondary battery including the negative electrode.

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

An anode active material for secondary batteries which has improved cycle swelling characteristics and rapid charge performance, an anode comprising same, and a method for manufacturing same, in which the anode active material is manufactured by modifying the surface of natural graphite particles. The natural graphite particles have a Dmax/Dmin value of 1.6 to 2.1 in the particle size distribution thereof and have, formed in the surface thereof, pores having a diameter of 0.5 μm to 2.0 μm.

Anode active material for secondary battery, anode comprising same, and method for manufacturing same

An anode active material for a secondary battery that has improved cycle swelling properties and rapid charge performance, an anode comprising same, and a method for manufacturing same. The anode active material is a mixture of artificial graphite and spherical natural graphite, wherein the spherical natural graphite has an average particle diameter (D 50) of 12 μm or less, with D 90-D 10 value ranging from 5 μm to 12 μm.

An anode active material for a secondary battery, which has improved cycle swelling properties and rapid charge performance, an anode comprising an anode active material for a secondary battery, and a method for manufacturing same. The anode active material is a mixture of scaly natural graphite and spherical natural graphite. An average particle diameter (D) of the scaly natural graphite is 10 &#x3bc;m to 15 &#x3bc;m and an average particle diameter (D) of the spherical natural graphite is 14 &#x3bc;m or less.

Anode active material for secondary battery, electrode comprising same, and method for manufacturing same

A negative electrode active material for a lithium secondary battery, including: first negative electrode active material particles including first artificial graphite particles and a carbon coating layer on a surface of the first artificial graphite particles, wherein the carbon coating layer comprises hard carbon; and second negative electrode active material particles including second artificial graphite particles, wherein a difference between an average particle diameter Dof the first negative electrode active material particles and an average particle diameter Dof the second negative electrode active material particles is 5 &#x3bc;m or less, and a temperature at an exothermic peak in differential thermogravimetric analysis of the carbon coating layer is in a range of 580&#xb0; C. to 690&#xb0; C.

Negative electrode active material for lithium secondary battery, method of preparing the same, and negative electrode for lithium secondary battery and lithium secondary battery including the same

A negative electrode for a lithium secondary battery 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. The negative electrode active material layer includes a negative electrode active material including artificial graphite particles, and the negative electrode has a pore resistance Rof 6&#x3a9; or less.

Negative electrode for lithium secondary battery and lithium secondary battery including the same

A negative electrode active material for a lithium secondary battery, a negative electrode including the same, and a lithium secondary battery including the negative electrode. Specifically, the present invention relates to a negative electrode active material capable of minimizing changes in a structure and internal total pore volume of an electrode during rolling of the electrode by controlling the type and amount of carbon coated on a surface of an artificial graphite active material, a negative electrode including the same, and a lithium secondary battery including the negative electrode.

Negative electrode active material for lithium secondary battery and negative electrode for lithium secondary battery including the same

A negative electrode for a lithium secondary battery, in which a LiF layer comprising amorphous LiF in an amount of 30 mol % or more is formed on a negative electrode active material layer comprising a carbon-based active material, a lithium secondary battery comprising the same, and a preparation method thereof.

Negative electrode for lithium secondary battery, lithium secondary battery comprising the same, and preparation method thereof

A negative electrode for a lithium-metal secondary battery, which has a wide specific surface area and a current density distribution that can be uniformly implemented, and a lithium-metal secondary battery including the same.

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Daejeon, South Korea

Hee Won Choi