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.

公开(公告)号：US20190140275A1

公开(公告)日：2019-05-09

申请号：US16182890

申请日：2018-11-07

Applicant: KOREA BASIC SCIENCE INSTITUTE

Inventor： YEON HO KIM ,  HAE JIN KIM ,  WON GI HONG ,  JONG GUK KIM

IPC: H01M4/52 ,  H01M10/0525 ,  H01M2/16 ,  H01M4/62

Abstract: Provided are an anode active material for secondary battery which includes porous iron oxide nanoparticles, a manufacturing method thereof, and a secondary battery including the same. The anode active material for secondary battery of the present disclosure minimizes a volume change of iron oxide caused by intercalation and deintercalation of lithium even during consecutive charges and discharges and thus can improve the capacity and lifespan characteristics of a secondary battery employing the anode active material. Further, the manufacturing method of an anode active material for secondary battery makes it possible to manufacture an anode active material for secondary battery including iron oxide nanoparticles in an environmentally friendly and simple manner and thus makes it possible to mass-produce the anode active material.

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.