Korea Electronics Technology Institute

Woosuk Cho

Youngjun Kim

Junho Song

Sanggil Woo

Jeomsoo Kim

Taeeun Yim

Kyungjun Lee

Goojin Jeong

Jisang Yu

Kyungsu Kim

Yeonggwang Park

Kowoon Lee

The present disclosure provides a solid electrolyte including an oxysulfide-based compound represented by LiPMSOX (Formula 1) and having excellent stability against moisture, a method of manufacturing the solid electrolyte, and an all-solid-state battery showing superior manufacturing processability. In Formula 1, M is one selected from a group consisting of Zr, Nb, Hf, Ta, Ga, In, Ti, Pb, Bi, Ge, As, Sb, Si, B, Al, and a combination thereof. X is one selected from a group consisting of F, Cl, Br, and I. Also, 6&#x3c;a&#x2264;7, 0&#x3c;b&#x3c;1, 0&#x3c;c&#x3c;1, 4&#x3c;d&#x3c;5, and 0&#x3c;e&#x3c;1.

Solid electrolyte, preparation method thereof, and all-solid-state battery employing the same

The present invention relates to a non-aqueous cathode material for lithium secondary batteries using a spherical transition metal complex carbonate, and a method for preparing same. According to the present invention, since the surface of a spherical transition metal complex carbonate, which is prepared by using a cobalt material, nickel material, manganese material, carboxyl group material, and ammonia material, is coated with titanium dioxide. In addition, by mixing the prepared, surface-coated transition metal complex carbonate with a lithium material and heat-treating the resultant material, it is possible to prepare a spherical Li-rich cathode material having a primary particle size of 200 nm or more, and a 0.1 C capacity of 250 mAh/g or more, and capable of implementing 96% or more of the initial capacity in a full cell after charging and discharging 60 times.

Non-aqueous, high capacity cathode material for lithium secondary battery, and method for preparing same

The present invention relates to a cathode active material, a lithium secondary battery having the same, and a method for preparing the same, and the purpose of the present invention is to provide battery properties and thermal stability under a high temperature environment even if the Ni content of M in LiMO(M=Ni, Co, Ti, Zr, etc.) of layered oxide is increased to 65% or more. The present invention provides a cathode active material for a lithium secondary battery which is represented by chemical formula 1 below and is obtained by substituting a part of Ni, Co and Mn for a dissimilar metal (M) through heat treatment with a lithium source after coating the dissimilar metal (M) on the surface of a transition metal precursor comprising Ni, Co and Mn.LiNiCoMnMO&#x2003;&#x2003;[Chemical Formula

Cathode active material, lithium secondary battery having same, and method for preparing same

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Seongnam-si, South Korea

Woosuk Cho