公开(公告)号：US20240332553A1

公开(公告)日：2024-10-03

申请号：US18369252

申请日：2023-09-18

Applicant: POSTECH Research and Business Development Foundation

Inventor： Sang Hoon YOU ,  Yong Tae KIM

IPC: H01M4/92 ,  C25B11/052 ,  C25B11/067 ,  C25B11/081

CPC classification number: H01M4/925 ,  C25B11/052 ,  C25B11/067 ,  C25B11/081

Abstract: The present invention relates to an electrochemical catalyst with a Schottky junction that can be used for selective redox reactions, more specifically, it is configured to forming a Schottky contact on the interface between metals, and metal oxides operating as a semiconductor material to selectively occur oxidation or reduction reactions through Schottky barrier control. Accordingly, the present invention ensures that substantially only oxidation reactions occur in the anode of a fuel cell or a water electrolyzer, while substantially only reduction reactions occur in the cathode and, thereby, has the effects of preventing catalyst degradation and increasing durability.

公开(公告)号：US20230227938A1

公开(公告)日：2023-07-20

申请号：US17885676

申请日：2022-08-11

Applicant: POSTECH Research and Business Development Foundation

Inventor： Yong Tae KIM ,  Go Gwon CHOE

IPC: C22B3/00 ,  C22B3/44

CPC classification number: C22B23/0461 ,  C22B3/44

Abstract: The present invention relates to a method for manufacturing a high-purity nickel/cobalt mixed solution for cathode materials by using a two-circuit process, and particularly to a method for manufacturing a high-purity Ni/Co mixed solution for cathode materials by using a two circuit process that adopts a two-circuit process to extract cobalt and nickel in a simultaneous manner and prepare a Ni/Co mixed solution, thereby reducing the investment cost for the manufacturing process and downsizing mixer-settler facilities to maximize the efficiency of site utilization.
The present invention skips the crystallization process by using the two-circuit process, so it is possible to solve the problem of increasing the unit product cost due to the additional process cost, prevent an increase in the consumption of the adjuster solution in each mixer-setter tank for pH adjustment and the process costs, and realize eco-friendly effects, such as cutting down the production of the process wastewater.

公开(公告)号：US20240410033A1

公开(公告)日：2024-12-12

申请号：US18665807

申请日：2024-05-16

Applicant: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION

Inventor： Yong Tae KIM ,  Young Jin LIM

IPC: C22B3/00 ,  C22B7/00 ,  C22B15/00 ,  H01M10/54

Abstract: A method for recovering valuable metals from waste batteries according to one embodiment of the present invention comprises: an impurity removal process for removing impurities comprising Cu from a waste battery raw material and discharging an aqueous phase comprising Ni and Co; and a Co extraction process to extract Co from the aqueous phase comprising Ni and Co and discharge an aqueous phase comprising Ni, wherein the impurity removal process may be carried out by mixing a dialkylphosphoric acid-based solvent extractant with another solvent extractant having a synergistic effect to increase the separation factor of Co and Cu.

公开(公告)号：US20240058794A1

公开(公告)日：2024-02-22

申请号：US18231842

申请日：2023-08-09

Applicant: Korea Advanced Institute of Science and Technology ,  POSTECH Research and Business Development Foundation

Inventor： Hyun Joo LEE ,  Gun Joo KIM ,  Yong Tae KIM

IPC: B01J23/83 ,  B01J23/72 ,  B01J35/00 ,  B01J35/02 ,  B01J37/03 ,  B01J6/00 ,  B01J37/04

CPC classification number: B01J23/83 ,  B01J23/72 ,  B01J35/0006 ,  B01J35/026 ,  B01J37/031 ,  B01J6/001 ,  B01J37/04

Abstract: The present disclosure relates to a copper-based catalyst for reverse water gas reaction including a gas-permeable amorphous shell formed by strong metal-support interaction. The inventors of the present disclosure synthesized a copper-ceria solid solution and then adjusted the surface defect sites of the solid solution, thereby producing a catalyst including enhanced surface defect sites and having a gas-permeable amorphous shell structure formed on each copper particle. When the catalyst production method according to the present disclosure is used, it is possible to synthesize a catalyst including a structure consisting only of very small Cu particles encapsulated by surface shells and Cu sites incorporated into the CeO2 lattice structure. When the synthesized catalyst is used in the RWGS reaction, it exhibits excellent low-temperature activity, high activity and durability, compared to conventional precious metal catalysts. In addition, even when the catalyst of the present disclosure is supported on a monolith and used to perform the RWGS reaction on a bench scale, it exhibits high activity, CO2 conversion and durability, which are comparable with those in the laboratory scale, indicating that it may be applied to an actual process.