Lg Energy Solution, Ltd.

Lg Chem, Ltd

Korea Research Institute of Standards and Science

Korea Advanced Institute of Science and Technology

Sk on Co., Ltd.

Korea Institute of Industrial Technology

Sang Wook Lee

Wang Mo Jung

Sang Min Park

Byung Chun Park

So Ra Baek

Ju Kyung Shin

Eun Sol Lho

Min Suk Kang

Ji Hoon Ryu

Dong Hun Lee

Seul Ki Kim

Hye Lim Jeon

Seong Hoon Kang

Gi Beom Han

Yong-Gyoo Kim

Wen Xiu Wang

Tae Gon Kim

Minsuk Kang

Hyelim Jeon

Eunsol Lho

Byung Il Choi

Sora Baek

Jong Cheol Kim

Sang Bong Woo

Soo Hyun Kim

Jin Hwan Kim

Jung Min Han

Donghun Lee

Dong Hwi Kim

Dae Jin Lee

Hak Yoon Kim

Seung Hwan Jo

Su Yong Kwon

Jin Doo Choi

Sung Yoon Ryu

Won Sik Kwon

Hyub Lee

Eun Jo

Seung Ryeol Oh

Je Young Kim

Kyung-Soo Kim

Sun Sik Shin

Jung Woo Yoo

Dae Ho Kim

Bo Ram Lee

Ji Young Park

Jin Tae Hwang

Yong Hyun Cho

Sang Han Lee

Dong Ho Park

Young Cheol Choi

Byung Moon Moon

Tae U Yu

Sungjun Lee

Youngseok Lee

Gang June Kim

Hyun Jin Koo

Byoung Beom Lim

Eun Su Jang

Hyeong Ii Kim

Sunghun Kim

Kyung-Suo Kim

Su Yeon Oh

A method of preparing a positive electrode active material includes preparing a lithium transition metal oxide containing nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, impregnating the lithium transition metal oxide with 300 ppm to 1,000 ppm of moisture based on 100 parts by weight of the lithium transition metal oxide, and performing a heat treatment on the lithium transition metal oxide impregnated with the moisture, wherein a lithium by-product present on a surface of the lithium transition metal oxide and the moisture react to form a passivation layer on the surface of the lithium transition metal oxide. A positive electrode active material prepared by the above-described preparation method, and a positive electrode and a lithium secondary battery which include the positive electrode active material are also provided.

Method of preparing positive electrode active material for lithium secondary battery and positive electrode active material prepared by the same

A positive electrode active material for a secondary battery which includes a nickel-based lithium composite transition metal oxide including nickel (Ni), wherein the lithium composite transition metal oxide satisfies Equation 1 and Equation 2 below80 nm≤crystallite size≤150 nm  [Equation 1]Δ size(|crystallite size−crystallite size|)≤20  [Equation 2]

Positive electrode active material for secondary battery and lithium secondary battery including the same

A positive electrode active material includes a nickel-based lithium composite metal oxide having a Ni content of 80 atm % or greater among transition metals except lithium, and in the form of a single particle or pseudo-single particle. The nickel-based lithium composite metal oxide has a coating layer positioned on the surface thereof, wherein the coating layer contains cobalt. The positive electrode active material also satisfies [Equation 1] 1≤XY/Z≤3, wherein X is the molar number (mol %) of Co in the coating layer based on 100 moles of the nickel-based lithium composite metal oxide, Y is the average particle diameter (μm) of nodules of the nickel-based lithium composite metal oxide, and Z is D(μm) of the positive electrode active material, wherein Z is from 5 μm to 12 μm.

Positive electrode active material and positive electrode including the same

A positive electrode active material for a secondary battery includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), and a glassy coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein, in the lithium composite transition metal oxide, an amount of the nickel (Ni) in a total amount of transition metals is 60 mol % or more, and an amount of the manganese (Mn) is greater than an amount of the cobalt (Co), and the glassy coating layer includes a glassy compound represented by Formula 1.LiMO  [Formula 1]

Positive electrode active material for secondary battery, method of preparing the same, and lithium secondary battery including the positive electrode active material

In one arrangement, the present disclosure relates to a positive electrode active material including a nickel-cobalt-manganese-based lithium transition metal oxide which contains nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, wherein the nickel-cobalt-manganese-based lithium transition metal oxide is doped with doping element M(where the doping element Mis a metallic element including Al) and doping element M(where the doping element Mis at least one metallic element selected from the group consisting of Mg, La, Ti, Zn, B, W, Ni, Co, Fe, Cr, V, Ru, Cu, Cd, Ag, Y, Sc, Ga, In, As, Sb, Pt, Au, and Si), where the doping element Mcan be in an amount of 100 ppm to 10,000 ppm, and the doping element Mand the doping element Mare included in a weight ratio of 50:50 to 99:1.

Positive electrode active material, and positive electrode and lithium secondary battery which include the positive electrode active material

The present disclosure relates to a thermocouple wafer calibration system including: a main body portion composed of a chamber forming a sealed space, and a support installed a lower edge of the chamber and supporting the chamber to be spaced apart from the ground; a thermocouple wafer composed of a plate installed to be horizontal inside the sealed space of the chamber, and a first thermocouple unit attached to a upper surface of the plate so as to form a plurality of first measurement contact points; a calibration portion provided with a second thermocouple unit penetrating the chamber in a space where the chamber spaced from the ground, then partially accommodated inside the sealed space, and calibrated to form a plurality of second measurement contact points in contact with a lower surface of the plate at a position corresponding to each of the first measurement contact points; a temperature measurement portion partially accommodated inside the sealed space of the chamber and measuring a temperature of the sealed space; a heating portion accommodated inside the sealed space of the chamber, allowing thermogenesis and being in thermal contact with the second thermocouple unit directly; a measurement portion connected to the first and second thermocouple units respectively, and measuring each thermal electromotive force for the first and second measurement contact points occurring when the first and second thermocouple units are in contact indirectly at both sides on the basis of the plate; and a temperature control portion calculating each temperature value for the first and second measurement contact points depending on values measured from the measurement portion, and, after comparing and analyzing the calculated temperature values and temperature values measured from the temperature measurement portion, allowing adjusting the temperature of the sealed space by controlling the heating portion based on the analysis result.

Thermocouple wafer calibration system and calibration method using the same

The present disclosure relates to a positive electrode active material for a secondary battery, the positive electrode active material being a lithium composite transition metal oxide particle including nickel (Ni) and cobalt (Co) and including at least one of manganese (Mn) and aluminum (Al), wherein the lithium composite transition metal oxide particle includes 60 mol % or greater of the nickel (Ni) in all metals excluding lithium, a doping element is doped on the lithium composite transition metal oxide particle, and the particle intensity of the lithium composite transition metal oxide particle is 210 MPa to 290 MPa.

Positive electrode active material for secondary battery, preparation method thereof, and positive electrode for secondary battery including same

A method of producing a positive electrode material for a secondary battery includes preparing a lithium composite transition metal oxide containing nickel, cobalt, and manganese, forming a coating layer on a surface of the lithium composite transition metal oxide, and post-treating the lithium composite transition metal oxide having the coating layer formed thereon, wherein the post-treating is performed by exposing the lithium composite transition metal oxide having the coating layer formed thereon to moisture at a relative humidity of 10% to 50% at 25° C., and then heat treating the lithium composite transition metal oxide to remove residual moisture.

Method of producing positive electrode material for secondary battery

A positive electrode active material may include a lithium layer doped with a first doping element and a transition metal layer doped with a second doping element. An I(003)/I(006) peak intensity ratio in X-ray diffraction measurement is equal to or less than 23.8.

Positive electrode active material, manufacturing method thereof, and positive electrode for lithium secondary battery comprising the same

A positive electrode active material for a secondary battery which includes a nickel-based lithium composite transition metal oxide including nickel (Ni), wherein the lithium composite transition metal oxide satisfies Equation 1 and Equation 2 below80 nm≤crystallite size≤150 nm  [Equation 1]Δsize(|crystallite size−crystallite size|)≤20  [Equation 2]

A positive electrode active material includes a core and a coating layer disposed on the core, wherein the core includes LiMO, wherein M is at least one element selected from the group consisting of nickel (Ni), cobalt (Co), and copper (Cu), and 1≤x≤5 and 0≤y≤2, and the coating layer includes carbon-based particles, wherein the carbon-based particle includes a structure in which a plurality of graphene sheets are connected, the carbon-based particle has an oxygen content of 1 wt % or more in the carbon-based particle, and the carbon-based particle has a D/G peak ratio of 1.55 or less during Raman spectrum measurement. A method of preparing the positive electrode active material, a positive electrode including the positive electrode active material, and a secondary battery including the positive electrode are also provided.

Positive electrode active material, method of preparing the same, positive electrode including the positive electrode active material, and secondary battery including the positive electrode

An electrode includes an electrode active material, wherein the electrode active material layer includes an electrode active material, polyvinylidene fluoride, and a conductive agent, wherein the conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is included in an amount of 0.01 wt % to 0.5 wt % in the electrode active material layer. A secondary battery including the same, and a method of preparing the electrode are also provided.

Electrode, secondary battery including the electrode, and method of preparing the electrode

A conductive material, and a method for preparing the same are provided. The conductive material has a structure where a plurality of graphene sheets are interconnected, wherein an oxygen content is 1 wt % or higher based on the total weight of the conductive material, and a D/G peak ratio is 2.0 or less when the Raman spectrum is measured.

Conductive material, electrode comprising the conductive material, secondary battery comprising the electrode, and method for preparing the conductive material

The present disclosure relates to a cathode additive of a lithium secondary battery, and a method for preparing the same. The cathode additive exhibits high irreversible capacity, and may be effectively applied to a battery using an anode material having high energy density. In one embodiment, the cathode additive includes a compound represented by the following Chemical Formula 1:y(LiNiMO)-z(LiCoMO) &#x2003;&#x2003;[Chemical Formula 1]

Additive for cathode, method for preparing the same, cathode including the same, and lithium secondary battery including the same

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Daejeon, South Korea

Sang Wook Lee