公开(公告)号：US20240001403A1

公开(公告)日：2024-01-04

申请号：US18255070

申请日：2021-12-02

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Hyun Joo Lee ,  Sang Mok Lee ,  Gichan Yun

IPC: B06B1/02

CPC classification number: B06B1/0292

Abstract: Disclosed are a capacitive micromachined ultrasonic transducer having an adjustable bending angle and a method for manufacturing same. The ultrasonic transducer according to one embodiment may comprise: a substrate; a plurality of transducer elements spaced apart from each other and stacked on top of the substrate; flexible hinges which are positioned between the plurality of transducer elements and formed so as to pass through the substrate; a first polymer layer formed so as to cover the bottom of the substrate; and an actuator layer formed under the first polymer layer.

公开(公告)号：US20220181642A1

公开(公告)日：2022-06-09

申请号：US17398564

申请日：2021-08-10

Applicant: Hyundai Motor Company ,  Kia Corporation ,  Korea Advanced Institute of Science and Technology

Inventor： Dae Yong Son ,  Jung Han Yu ,  Byoung Su Kim ,  Hyun Joo Lee ,  Hee Eun Kim

IPC: H01M4/90 ,  H01M4/88

Abstract: Disclosed are a catalyst complex which may suppress cell voltage reversal in a fuel cell and a method for manufacturing the same. The catalyst complex includes a support, a first catalytic active material supported on the support and comprising a platinum component including one or more selected from the group consisting of platinum and a platinum alloy, and a second catalytic active material supported on the support and comprising one or more selected from a noble metal other than platinum and an oxide thereof, and the support includes functional groups including oxygen.

公开(公告)号：US11735746B2

公开(公告)日：2023-08-22

申请号：US16842459

申请日：2020-04-07

Applicant: Hyundai Motor Company ,  Kia Motors Corporation ,  Korea Advanced Institute of Science and Technology

Inventor： Jung Han Yu ,  Bo Ki Hong ,  Jong Kil Oh ,  Hyun Joo Lee ,  Chi Woo Roh

IPC: H01M4/00 ,  H01M4/86 ,  H01M4/92

CPC classification number: H01M4/8652 ,  H01M4/923 ,  H01M4/925

Abstract: Disclosed is a catalyst complex for a fuel cell. The catalyst complex includes a support including carbon (C), platinum (Pt) supported on the support, and an iridium (Ir) compound supported on the support, and the iridium compound includes at least one of iridium oxide represented by Chemical Formula 1, IrOx, and iridium-transition-metal oxide represented by Chemical Formula 2, IrMOx, wherein M is a transition metal selected from the group consisting of Fe, Co, Cu, Ni and combinations thereof, and x is from 1 to 2.

公开(公告)号：US10266475B2

公开(公告)日：2019-04-23

申请号：US15752181

申请日：2017-01-31

Applicant: LG CHEM, LTD. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Won Jae Lee ,  Dong Su Song ,  Yong Jin Choe ,  Hyun Joo Lee ,  Min Su Kim

IPC: C07C51/25 ,  C07C51/44 ,  C07C51/50 ,  C07C57/04 ,  B01J23/44 ,  B01J23/58 ,  B01J23/60 ,  B01J23/66 ,  B01J23/68 ,  B01J23/74 ,  B01J23/78 ,  B01J23/80 ,  B01J23/89 ,  B01J35/00 ,  B01J35/02 ,  B01J35/08 ,  B01J37/00 ,  B01J37/02 ,  B01J23/46 ,  B01J23/52 ,  B01J37/16

Abstract: A method for preparing acrylic acid, more specifically, to a method for preparing acrylic acid under a neutral condition at high yield in a short time without using a base, unlike the prior art in which a base is essentially used. The acrylic acid is produced using a supported catalyst having a specific composition when preparing acrylic acid by oxidation of allyl alcohol. Particularly, the preparation method can recover acrylic acid rather than acrylic acid salt as a final product, and thus has an advantage that the overall process cost can be reduced by eliminating essential processes in the prior art, such as ion exchange after the acidification process required for the conversion of acrylic acid salt to acrylic acid.