公开(公告)号：US20190140273A1

公开(公告)日：2019-05-09

申请号：US16182787

申请日：2018-11-07

Applicant: KOREA BASIC SCIENCE INSTITUTE

Inventor： MING YOUNG SONG ,  HAE JIN KIM ,  WON GI HONG ,  JIN BAE LEE ,  JONG GUK KIM

IPC: H01M4/505 ,  H01M10/0525

Abstract: A manufacturing method of a cathode active material for lithium secondary battery, including: preparing a first solution by mixing a metal oxide and a solvent; preparing a metal-mixed solution by adding an acidic solution to the first solution and then applying ultrasonic waves to the mixture; centrifuging the metal-mixed solution; preparing a second solution by mixing a supernatant of the centrifuged metal-mixed solution, a reductant, and a solvent and then applying ultrasonic waves to the mixture; obtaining powder by filtering and then drying the second solution; forming mesoporous spherical nanoparticles by mixing the powder, a metal, a lithium precursor, and a solvent, applying ultrasonic waves to the mixture and then drying the mixture; and performing a heat treatment to the spherical nanoparticles, and a cathode active material for a lithium secondary battery obtained by the manufacturing method. The cathode active material for lithium secondary battery is mesoporous spherical nanoparticles.

公开(公告)号：US20190140272A1

公开(公告)日：2019-05-09

申请号：US16182738

申请日：2018-11-07

Applicant: KOREA BASIC SCIENCE INSTITUTE

Inventor： JONG GUK KIM ,  HAE JIN KIM ,  WON GI HONG ,  JIN BAE LEE

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: Provided are a cathode active material for a lithium secondary battery which is represented by general formula (1) below and has a nanorod shape, a manufacturing method thereof, and a lithium secondary battery including the same. LiNi1−x−yMnxMyO2   (1)

公开(公告)号：US20190140263A1

公开(公告)日：2019-05-09

申请号：US16182954

申请日：2018-11-07

Applicant: KOREA BASIC SCIENCE INSTITUTE

Inventor： YOU NA KO ,  HAE JIN KIM ,  WON GI HONG ,  JIN BAE LEE

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/587

Abstract: The present disclosure provides a process for the production of a cathode active material complex which is used for a lithium secondary battery, comprising the steps of: mixing a lithium metal phosphate with a solvent to prepare a first precursor; mixing the first precursor with a graphene oxide to prepare a second precursor solution; forming droplets from the second precursor solution; and making the droplets into a powder; wherein the formation of the powder is performed by spray pyrolysis method.