Lg Chem, Ltd

Lg Energy Solution, Ltd.

Chang Hun Park

Min Chul Jang

Doo Kyung Yang

Da Young Sung

Taek Gyoung Kim

Eun Kyung Park

Chan Yeup Chung

Jung Hun Choi

Byoung Kuk Son

Myeong Hun Song

Byong Kuk Son

A film-shaped coating layer including at least one lithium ion conductive compound having a band gap of 5.5 eV to 10 eV formed on the surface of a core including a lithium composite metal oxide to a thickness at which dielectric breakdown does not occur according to types of the lithium ion conductive compound and the lithium composite metal oxide under charge and discharge conditions. Thereby, an oxidation/reduction reaction is suppressed by blocking the movement of electrons at an interface between an active material and an electrolyte solution by the coating layer which surrounds the surface of particles and has lithium ion conductivity, and, as a result, a positive electrode active material for a secondary battery, which may improve energy density of an electrode and life characteristics of a battery, and a secondary battery including the same are provided.

Cathode active material for secondary battery and secondary battery comprising same

The present disclosure relates to a lithium sulfur battery, and the battery includes a cathode and an anode arranged facing each other; a separator interposed between the cathode and the anode; and an electrolyte, and further includes at least one or more membranes of a lithium ion conductive polymer membrane positioned between the cathode and the separator and having a sulfonic acid group (&#x2014;SOH), and a metal oxide membrane positioned between the anode and the separator, and therefore, an electrode active material loss is reduced, an improved lifespan characteristic is obtained by blocking the spread of lithium polysulfide to the anode, and in addition thereto, enhanced safety is obtained by suppressing a dendrite growth in the anode.

Lithium sulfur battery

Growing community of inventors

Daejeon, South Korea

Chang Hun Park