公开(公告)号：US11253953B1

公开(公告)日：2022-02-22

申请号：US17387662

申请日：2021-07-28

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Lan Jiang ,  Xiaozhe Chen ,  Xin Li ,  Xiaojie Li ,  Misheng Liang

IPC: B23K26/06 ,  B23K26/362 ,  B23K26/067

Abstract: A method and a device for processing a unidirectional flow surface, the method includes: generating a grayscale map having gradually changed grayscale values; generating a holographic phase map having a bionic light spot with gradually changed energies based on the grayscale map; loading the holographic phase map onto a spatial beam shaper; and focusing a laser beam on a surface of an object to be processed after the laser beam passes through the spatial beam shaper, to process structural units having unidirectional flow characteristics on the surface of the object to be processed.

公开(公告)号：US11352261B1

公开(公告)日：2022-06-07

申请号：US17508152

申请日：2021-10-22

Applicant: BEIJING INSTITUTE OF TECHNOLOGY

Inventor： Lan Jiang ,  Yongjiu Yuan ,  Xin Li

IPC: H01M4/02 ,  C01B32/184 ,  H01G11/24 ,  H01G11/36 ,  B82Y40/00

Abstract: The present disclosure relates to a graphene-nanoflower shaped MXene composite material, preparation method and application thereof, which belongs to the field of negative electrode materials for supercapacitors. In the present disclosure, a space-time shaping femtosecond laser is utilized to process MXene target in graphene oxide nanoflake dispersion, so as to synthesize a graphene-nanoflower shaped MXene composite material in one-step. This nanoflower shaped MXene has adjustable size and morphology and an extremely large specific surface area; when it is used in an electrode material for supercapacitors, the supercapacitor exhibits an extremely high specific capacitance and good cycle stability. This method utilizes a space-time shaping femtosecond laser to synthesize the graphene-nanoflower shaped MXene composite material, which is highly controllable, and can be used to uniformly prepare the material in large-scale. It has provided a new way for synthesis of materials.