Lg Chem, Ltd

Seyang Polymer

Soo Min Park

Hong-Kyu Park

Ji Eun Lee

Sung Kyun Chang

Sinyoung Park

Cheol-Hee Park

Sanghoon Choy

Hyo-Shik Kil

Yong Chul Lee

Yong Tae Lee

Geun-Chang Chung

Youn Eung Lee

Hyelim Jeon

Sun Hwa Jang

Tae-Young Ha

Jin Kyu Lee

Keun Wan An

Sunkyu Kim

Hyuk Jin Kim

Young Hwa Jung

Hong Sun Na

The present disclosure relates to a liquid crystal polyester resin composition and an electronic component material comprising the same with low dust characteristics. Specifically, the present disclosure relates to a liquid crystal polyester resin composition for preventing dust generation comprising 65% by weight or more and 85% by weight or less of a liquid crystal polyester resin; more than 0.5% by weight and less than 10% by weight of a transition metal compound containing a Group 6 element of the periodic table; 2% by weight or more and 10% by weight or less of a barium compound; 2% by weight or more and 10% by weight or less of an organic filler; and 12% by weight or more and 30% by weight or less of a filler.

Liquid crystal polyester resin composition and electronic component material containing the same

Provided is an olivine-type lithium iron phosphate having a composition represented by Formula I, comprising 0.1 to 5% by weight of LiPO, and comprising no LiCOor, if present, comprising LiCOin an amount less than 0.25% by weight: LiFeM(PO)X(I) wherein M, X, a, x and b are as defined above. The lithium iron phosphate comprises no lithium carbonate (LiCO) or, if present, comprises the LiCOin an extremely small amount, and comprises LiPOhaving superior electrochemical stability, thermal stability and ionic conductivity, thus advantageously imparting high-temperature and storage stability as well as stability and rate properties to lithium secondary batteries, when used as a cathode active material for the lithium secondary batteries.

Lithium iron phosphate having olivine structure and method for analyzing the same

Provided is an olivine-type lithium iron phosphate composed of secondary particles having a mean particle diameter (D50) of 5 to 100 &#x3bc;m, formed by aggregation of primary particles having a mean particle diameter (D50) of 50 to 550 nm, wherein the primary and secondary particles have a composition represented by Formula I below and the secondary particles have a porosity of 15 to 40%: LiFeM(PO)X(I) wherein M is selected from Al, Mg, Ni, Co, Mn, Ti, Ga, Cu, V, Nb, Zr, Ce, In, Zn, Y and combinations thereof; X is selected from F, S, N and combinations thereof; &#x2212;0.5&#x2266;a&#x2266;+0.5; 0&#x2266;x&#x2266;0.5; and 0&#x2266;b&#x2266;0.1.

Lithium iron phosphate having olivine structure and method for preparing the same

Provided is a cathode for lithium secondary batteries comprising a combination of one or more compounds selected from Formula 1 and one or more compounds selected from Formula 2. The cathode provides a high power lithium secondary battery composed of a non-aqueous electrolyte which exhibits long lifespan, long-period storage properties and superior stability at ambient temperature and high temperatures.

Cathode based upon two kinds of compounds and lithium secondary battery comprising the same

Disclosed is a cathode active material represented by the following Formula 1, the cathode active material being in the form of a solid solution or a composite, and a secondary battery including the cathode active material.LiMOLiM'OLiM&#x2033;OLiPO&#x2003;&#x2003;(1)

Cathode active material for secondary batteries

Provided is a cathode active material having a composition represented by the following Formula I: LiFe(PO) (I) wherein a molar fraction (1&#x2212;x) of phosphorus (P) is in the range of 0.910 to 0.999, to allow operational efficiency of the cathode active material to be leveled to a lower operational efficiency of an anode active material and improve energy density of the cathode active material. Furthermore, a cathode active material, wherein a molar fraction (1&#x2212;x) of phosphorus (P) is lower than 1, contains both Feand Fe, thus advantageously preventing structural deformation, improving ionic conductivity, exhibiting superior rate properties and inhibiting IR drop upon charge/discharge, thereby imparting high energy density to batteries.

Cathode active material providing improved efficiency and energy density of electrode

Provided is a cathode mix for lithium secondary batteries, comprising a cathode active material having a composition represented by the following Formula I: LiFe(PO) (I) wherein a molar fraction (1&#x2212;x) of phosphorus (P) is in the range of 0.910 to 0.999, to allow operational efficiency of the cathode active material to be leveled to a lower operational efficiency of an anode active material and improve energy density of the cathode active material. The cathode mix maximizes operational efficiency of batteries, minimizes electrode waste and thus reduces manufacturing costs of batteries. Furthermore, The cathode active material, wherein a molar fraction (1&#x2212;x) of phosphorus (P) is lower than 1, according to the present invention contains both Feand Fe, thus advantageously causing no structural deformation, improving ionic conductivity, exhibiting superior rate properties, inhibiting IR drop upon charge/discharge, thereby imparting high energy density to batteries.

Cathode mix having improved efficiency and energy density of electrode

Provided is a cathode for lithium secondary batteries comprising a combination of one or more compounds selected from Formula 1 and one or more compounds selected from Formula 2. The cathode provides a high-power lithium secondary battery composed of a non-aqueous electrolyte which exhibits long lifespan, long-period storage properties and superior stability at ambient temperature and high temperatures.

Disclosed herein is a cathode active material for a secondary battery, which includes a combination of one or more selected from compounds represented by Formula 1, one or more selected from compounds represented by Formula 2, and one or more selected from compounds represented by Formula 3,(1-s-t)[Li(LiMnNiCo)O]*s[LiCO]*t[LiOH]&#x2003;&#x2003;(1)Li(LiMnO&#x2003;&#x2003;(2)(1-u)LiFePO*uC&#x2003;&#x2003;(3)In these formulae 0&#x3c;a&#x3c;0.3; 0&#x3c;x&#x3c;0.8; 0&#x3e;y&#x3e;0.6; 0&#x3c;s&#x3c;0.05; 0&#x3c;t&#x3c;0.05; 0&#x3c;b&#x3c;0.3; 0.01&#x3c;u&#x3c;0.1, wherein a, b, x and y denote mole ratios; and s, t and u denote weight ratios. The disclosed cathode active material has long lifespan and storage characteristics at room temperature and/or high temperature and excellent safety, and is effectively used to fabricate a non-aqueous electrolyte type high power lithium secondary battery having excellent rate properties and power characteristics.

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Daejeon, South Korea

Soo Min Park