Lg Chem, Ltd

Sun Jung Hwang

Geun Chang Chung

Sin Kyu Kim

Jung Seok Choi

Sung Kyun Chang

Jae Hyun Lee

Song Taek Oh

Sin Young Park

Yong Tae Lee

Yoon Kyung Kwon

Hyun Kuk Noh

Su Hwan Kim

Jin Hyung Lim

Dong Seok Shin

Keun Wan An

Won Hee Jeong

Kyungkoo Lee

KeunWan An

Provided is a composite electrode for a lithium secondary battery for improving output and a lithium secondary battery including the composite electrode, in which, in a composite electrode having two or more active materials mixed therein, an active material having a small particle size is included in the composite electrode by being coagulated and secondarily granulated so as to allow mixed active material particles to have a uniform size, and thus, electrical conductivity is improved to have high output characteristics.

Active material for lithium secondary battery composite electrode for improving output and lithium secondary battery including the active material

Disclosed is a positive electrode for secondary batteries manufactured by coating and rolling a slurry for a positive electrode mix including positive electrode active material particles on a current collector, wherein the positive electrode active material particles include one or more selected from the group consisting of lithium iron phosphate particles having an olivine crystal structure and lithium nickel-manganese-cobalt composite oxide particles according to Formula 1, the lithium nickel-manganese-cobalt composite oxide particles existing as secondary particles formed by agglomeration of primary particles, in an amount of greater than 50% and less than 90% based on the total volume of lithium nickel-manganese-cobalt composite oxide, and the lithium iron phosphate particles existing as primary particles in an amount of greater than 50% and less than 100% based on the total volume of lithium iron phosphate (Formula 1 is the same as defined in Claim).

Positive electrode for secondary batteries and secondary battery including the same

Provided are a positive electrode active material for improving an output and a lithium secondary battery including the same. Particularly, graphite and conductive carbon which have shapes and sizes different from each other, may be simultaneously coated on a mixed positive electrode material of a 3-component system lithium-containing metal oxide having a layered structure and expressed as following Chemical Formula 1 and LiFePOhaving an olivine structure as an conductive material to improve high resistance occurrence and conductivity reduction phenomenon of a 3-component system lithium metal oxide due to a difference between particle sizes and surface areas of the 3-component system lithium-containing metal oxide and LiFePOolivine.LiNiCoMnO, 0&#x2266;&#x3c;0.5, 0&#x3c;&#x3c;1, 0&#x3c;&#x3c;0.5&#x2003;&#x2003;[Chemical formula 1]

Lithium secondary battery positive electrode material for improving output characteristics and lithium secondary battery including the same

The present invention relates to polymer-silicon composite particles using silicon having high energy density, a method of making the same, an anode and a lithium secondary battery including the same. The silicon having high energy density is used as an anode active material to provide a lithium secondary battery having large capacity. Silicon-polymer composite particles having a metal plated on the surface thereof are provided to solve the problem that silicon has low electrical conductivity and a method of preparing the same is provided to produce an electrode having improved electrical conductivity. Furthermore, silicon-polymer composite particles having a metal coated on the surface thereof through electroless plating are prepared and an electrode is formed using the silicon-polymer composite particles.

Polymer-silicon composite particles, method of making the same, and anode and lithium secondary battery including the same

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Daejeon, South Korea

Sun Jung Hwang