Lg Chem, Ltd

Hanwha Chemical Corporation

Lg Energy Solution, Ltd.

Lg Chemical Ltd.

Sung-Kyun Chang

JungMin Han

Je Young Kim

Hong Kyu Park

Jeong-Ju Cho

Sin Young Park

Jae-Hyun Lee

In Sung Uhm

Seung-Tae Hong

Donghun Lee

Dong Hun Lee

Soojin Kim

Je-Young Kim

Yo-Han Kwon

Hong-Kyu Park

Sang Min Park

Byung Chun Park

Sang-Wook Woo

Sang-Hoon Choy

Byung-Hun Oh

Seong Hoon Kang

Ho Suk Shin

Sinyoung Park

Ki-Young Lee

Jin-Hyung Lim

SungJin Kim

Dong-Sub Jung

Min-Chul Jang

Wang Mo Jung

Cheol-Hee Park

Sang Hoon Choy

Song Taek Oh

Yong Tae Lee

Yong-Tae Lee

Ho-Chun Lee

Duk-Hyun Ryu

WonSeok Chang

Won Seok Chang

Soo-Hyun Ha

YoHan Kwon

Joon-Hwan Lee

Jinhyung Lim

Mikyung Chung

Hyo-Shik Kil

Wan-Jae Myeong

Kyu-Ho Song

Hera Lee

Joo-Hyeong Lee

Eui-Yong Bang

Young-Sik Hahn

Myung-Ho Cho

Jung-Soo Kang

Jung Min Han

Su-min Park

Ho Seon Shin

JiEun Lee

Tae-Shin Cho

Hyelim Jeon

Byungchun Park

Hyeong-Jin Kim

Hyun Jin Oh

Eun-Young Goh

Sang Uck Lee

HoSuk Shin

WonSeok Jang

ByungHun Oh

Seung-tae Hong

Jun-Yong Jeong

Saebomi Park

Jong-San Chang

Hee-Sang Park

Young-Kyu Hwang

Deok-Kyu Kim

Seong-Yong Park

Sung-Hwa Jhung

Hosuk Shin

Sungjin Kim

Jin-Hee Yeon

Disclosed are a transition metal precursor for preparation of a lithium transition metal oxide, in which a ratio of tap density of the precursor to average particle diameter D50 of the precursor satisfies the condition represented by Equation 1 below, and a lithium transition metal oxide prepared using the same. 

Transition metal precursor having low tap density and lithium transition metal oxide having high particle strength

Disclosed is a cathode active material for secondary batteries comprising at least one compound selected from the following formula 1:(1&#x2212;)[Li(LiMnNiCo)O]*[LiCO]*[LiOH]&#x2003;&#x2003;(1)wherein 0&#x3c;a&#x3c;0.2, 0&#x3c;x&#x3c;0.9, 0&#x3c;y&#x3c;0.5, a+x+y&#x3c;1, 0&#x3c;s&#x3c;0.03, and 0&#x3c;t&#x3c;0.03; and a, x and y represent a molar ratio, and a and t represent a weight ratio. The cathode active material has long lifespan at room temperature and high temperatures and provides superior stability, although charge and discharge are repeated at a high current.

Cathode active material and lithium secondary battery comprising the same

Disclosed is a method of manufacturing a secondary battery, built in a battery case, having an electrode assembly impregnated with an electrolyte solution, the method including: A secondary battery manufactured according to the method may have improved electrolyte solution impregnation properties, ionic conductivity, electronic conductivity and the like and, as such, may have improved electrochemical performance.

Method of manufacturing secondary battery

Disclosed is a transition metal precursor used for preparation of lithium composite transition metal oxide, the transition metal precursor comprising a composite transition metal compound represented by the following Formula 1:M(OH)A&#x2003;&#x2003;(1) The transition metal precursor according to the present invention contains a specific anion. A lithium composite transition metal oxide prepared using the transition metal precursor comprises the anion homogeneously present on the surface and inside thereof, and a secondary battery based on the lithium composite transition metal oxide thus exerts superior power and lifespan characteristics, and high charge and discharge efficiency.

Precursor for preparing lithium composite transition metal oxide and method for preparing the same

Disclosed is a method of manufacturing a secondary battery wherein an electrode assembly impregnated with an electrolytic solution is embedded in a battery case, A secondary battery manufactured according to the method may have improved ionic conductivity, electronic conductivity and the like and, as such, may have improved electrochemical performance.

Disclosed is a cathode active material for secondary batteries comprising at least one compound selected from the following formula 1:(1&#x2212;s&#x2212;t)[Li(LiMnNiCo)O]*s[LiCO]*t[LiOH]&#x2003;&#x2003;(1)wherein 0&#x3c;a&#x3c;0.2, 0&#x3c;x&#x3c;0.9, 0&#x3c;y&#x3c;0.5, a+x+y&#x3c;1, 0&#x3c;s&#x3c;0.03, and 0&#x3c;t&#x3c;0.03; and a, x and y represent a molar ratio, and a and t represent a weight ratio. The cathode active material has long lifespan at room temperature and high temperatures and provides superior stability, although charge and discharge are repeated at a high current.

Disclosed is a cathode active material for secondary batteries comprising one or more compounds having a layered-crystal structure, represented by the following Formula 1, wherein a transition metal layer contains Li, in an amount lower than 20%, based on a total amount of a transition metal site, and a ratio of Ni positioned in a lithium layer, that is, a cation mixing ratio is 1% to 4.5%, based on a total amount of a lithium site in the lithium layer to stably support the layered-crystal structure: (1-s-t)[Li(LiMnNiCo)O]*s[LiCO]*t[LiOH] (1), wherein 0&#x3c;a&#x3c;0.2; 0&#x3c;x&#x3c;0.9; 0&#x3c;y&#x3c;0.5; a+x+y&#x3c;1; 0&#x3c;s&#x3c;0.03; and 0&#x3c;t&#x3c;0.03. The cathode active material exhibits long lifespan and superior stability at room temperature and high temperatures in spite of repeated charge and discharge at a high current.

Disclosed herein is an integrated electrode assembly including a cathode, an anode, and a separation layer integrated between the cathode and the anode. The separation layer includes 3 phases including a liquid-phase component containing an ionic salt, which partially flows from the separation layer into the cathode and the anode during preparation of the integrated electrode assembly to increase ionic conductivity of the cathode and the anode, a solid-phase component supporting the separation layer between the cathode and the anode, and a polymer matrix having affinity for the liquid-phase component and providing binding force with the cathode and the anode.

Unification-typed electrode assembly and secondary battery using the same

The present invention relates to a cable-type secondary battery comprising a polymer electrolyte having a first electrolyte layer comprising a mixture of a first polymer and a first organic electrolyte solution in a weight ratio of 50:50 and 80:20; and a second electrolyte layer formed on at least one surface of the first electrolyte layer and comprising a mixture of a second polymer and a second organic electrolyte solution in a weight ratio of 20:80 and 50:50. Since the multiple-layered polymer electrode film of the present invention exhibits good characteristics in terms of both mechanical property and ionic conductivity, the cable-type secondary battery comprising the same according to the present invention has superior battery performances and flexibility, as well as good strength for withstanding external impact.

Cable-type secondary battery

Disclosed is a polymer electrolyte having a multilayer structure including a first polymer layer providing mechanical strength against external force and a second polymer layer to secure a conduction path for lithium ions, wherein the first polymer layer includes an organic electrolyte containing an ionic salt in an amount of 0 wt % to 60 wt % based on a weight of a polymer matrix of the first polymer layer and the second polymer layer includes an organic electrolyte containing an ionic salt in an amount of 60 wt % to 400 wt % based on a weight of a polymer matrix of the second polymer layer, and a lithium secondary battery including the same.

Polymer electrolyte and lithium secondary battery including the same

Disclosed herein is an integrated electrode assembly including a cathode, an anode, and a separation layer disposed between the cathode and the anode. The cathode, the anode, and the separation layer are integrated with each other. The separation layer includes 3 phases including a liquid-phase component containing an ionic salt, a solid-phase component supporting the separation layer between the cathode and the anode, and a polymer matrix in which linear polymers and cross-linked polymers form a viscoelastic structure with the liquid-phase component and the solid-phase component being incorporated in the polymer matrix. The polymer matrix is coupled to each of the cathode and the anode. The liquid-phase component of the separation layer flows into the electrodes (i.e., the cathode and anode) during preparation of the integrated electrode assembly to greatly improve wetting properties of the electrodes and to increase ionic conductivity of the electrodes.

Integrated electrode assembly and secondary battery using same

Disclosed is a lithium iron phosphate with an olivine crystal structure wherein the lithium iron phosphate has a composition represented by the following Formula 1 and carbon (C) is coated on the surface of the lithium iron phosphate by chemical bonding via a heterogeneous element other than carbon. LiFeM(PO)X(1) (wherein M, X, a, x, and b are the same as defined in the specification).

Carbon-coated lithium iron phosphate of olivine crystal structure and lithium secondary battery using the same

Disclosed is a cathode mix for secondary batteries, comprising lithium iron phosphate, coated with carbon (C), having an olivine crystal structure that contains a compound represented by the following formula 1 as a cathode active material, wherein a mean particle diameter of primary particles in the cathode active material is 2 &#x3bc;m or less, and the cathode mix contains a hydrophilic conductive material as a conductive material.(1&#x2212;)LiFeM(PO)AC&#x2003;&#x2003;(1) wherein M is at least one selected from Al, Mg, Ni, Co, Mn, Ti, Ga, Cu, V, Nb, Zr, Ce, In, Zn and Y, A is at least one selected from F, S and N, and 0&#x3c;x&#x2266;0.2, &#x2212;0.5&#x2266;a&#x2266;+0.5, 0&#x2266;y&#x2266;0.5, 0&#x2266;z&#x2266;0.1.

Cathode mix for secondary battery and secondary battery comprising the same

Growing community of inventors

Daejeon, South Korea

Sung-Kyun Chang