公开(公告)号：US11626592B2

公开(公告)日：2023-04-11

申请号：US16892406

申请日：2020-06-04

Applicant: KOREA MARITIME UNIVERSITY INDUSTRY—ACADEMIC COOPERATION FOUNDATION ,  GLOBAL FRONTIER HYBRID INTERFACE MATERIALS

Inventor： Jun Kang ,  Kwang Ho Kim

IPC: H01M4/587 ,  H01M10/0525 ,  C01B32/05 ,  H01M4/36

Abstract: The present invention relates to a lithium-carbon composite having cavities formed therein and a method of manufacturing the same, the method including adding and mixing an organic solvent having an aromatic ring with a lithium precursor, arranging a pair of metal wires in the organic solvent, forming a lithium-carbon composite in which a carbon body is doped with lithium through plasma discharge in a solution, and annealing the lithium-carbon composite in order to remove hydrogen from the lithium-carbon composite and form cavities in the lithium-carbon composite. Accordingly, a lithium-carbon composite can be simply synthesized using plasma discharge in a solution, and the synthesized lithium-carbon composite can be annealed to thus form cavities therein, thereby increasing the lithium charge and discharge performance of a lithium secondary battery using the lithium-carbon composite.

公开(公告)号：US11749802B2

公开(公告)日：2023-09-05

申请号：US17356745

申请日：2021-06-24

Applicant: KOREA MARITIME UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jun Kang ,  Dae Young Kim

IPC: H01M4/587 ,  B01J19/08 ,  C01B32/05 ,  H01M4/02 ,  H01M10/054

CPC classification number: H01M4/587 ,  B01J19/088 ,  C01B32/05 ,  B01J2219/0828 ,  B01J2219/0877 ,  B01J2219/0896 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2002/85 ,  C01P2006/40 ,  H01M10/054 ,  H01M2004/027

Abstract: A method for manufacturing a porous carbon material doped with a heterogeneous element and a porous carbon material doped with a heterogeneous element manufactured using the method are proposed. The method includes melting carbon precursor powder that contains one or more kinds of heterogeneous elements selected from metal and nonmetal to prepare a precursor melt; disposing a pair of metal wires in the precursor melt; and applying power to the metal wires to perform plasma-discharge, thus forming and aggregating carbon nanoparticles doped with the heterogeneous element while having a micropore and thereby forming a porous carbon material having a meso-macro hierarchical pore structure. As the heterogeneous element is bound to carbon of the carbon precursor, the carbon nanoparticles are formed in an amorphous structure while being doped with the heterogeneous element, thus increasing an active site.

公开(公告)号：US20210408543A1

公开(公告)日：2021-12-30

申请号：US17356745

申请日：2021-06-24

Applicant: KOREA MARITIME UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jun Kang ,  Dae Young Kim

IPC: H01M4/587 ,  B01J19/08 ,  C01B32/05

Abstract: A method for manufacturing a porous carbon material doped with a heterogeneous element and a porous carbon material doped with a heterogeneous element manufactured using the method are proposed. The method includes melting carbon precursor powder that contains one or more kinds of heterogeneous elements selected from metal and nonmetal to prepare a precursor melt; disposing a pair of metal wires in the precursor melt; and applying power to the metal wires to perform plasma-discharge, thus forming and aggregating carbon nanoparticles doped with the heterogeneous element while having a micropore and thereby forming a porous carbon material having a meso-macro hierarchical pore structure. As the heterogeneous element is bound to carbon of the carbon precursor, the carbon nanoparticles are formed in an amorphous structure while being doped with the heterogeneous element, thus increasing an active site.

公开(公告)号：US20210305570A1

公开(公告)日：2021-09-30

申请号：US16893693

申请日：2020-06-05

Applicant: KOREA MARITIME UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION

Inventor： Jun Kang ,  Dae Young Kim

IPC: H01M4/587 ,  H01M10/054 ,  H01M4/36

Abstract: The present invention relates to a method of manufacturing a nitrogen-carbon aggregate having a hierarchical pore structure, a nitrogen-carbon aggregate manufactured therefrom, and a sodium ion battery including the same. The technical gist of the present invention includes a method of manufacturing a nitrogen-carbon aggregate having a hierarchical pore structure, a nitrogen-carbon aggregate manufactured therefrom, and a sodium ion battery including the same. The method includes a first step of manufacturing a precursor solution including a nitrogen-containing carbon precursor, a second step of disposing a pair of metal wires in the precursor solution, and a third step of applying electric power to the metal wires to discharge a plasma, so that nitrogen is bonded to carbon of the carbon precursor, thus forming nitrogen-doped carbon nanoparticles of a turbostratic structure including micropores in the surface thereof and then forming an aggregate having a meso-macro hierarchical pore structure due to agglomeration of the carbon nanoparticles. The number of active sites in the aggregate is increased due to nitrogen doping.