公开(公告)号：WO2022063757A1

公开(公告)日：2022-03-31

申请号：PCT/EP2021/075892

申请日：2021-09-21

Applicant: ABB SCHWEIZ AG

Inventor： FRIBERG, Andreas ,  ANDERSSON, Anna ,  JOHANSSON, Erik

IPC: H01H1/021 ,  H01H1/0237 ,  H01H1/027 ,  H01H11/04 ,  B22F1/00

Abstract: The invention relates to an electric contact configured to repeatedly closing and opening a conducting path by breaking and connecting an electrical circuit. The electric contact comprises contacting surfaces configured to be brought into contact with each other for closing the electrical circuit, and to be brought apart for opening the electrical circuit. At least one of the contacting surfaces of the electric contact comprises a metal-graphene composite layer in which functionalized graphene is dispersed in a matrix of the metal, wherein the functionalized graphene is present in an amount within the range of from 0.05 wt% to 3 wt%.

公开(公告)号：WO2022238056A1

公开(公告)日：2022-11-17

申请号：PCT/EP2022/059242

申请日：2022-04-07

Applicant: ABB SCHWEIZ AG ,  NANESA S.R.L.

Inventor： ANDERSSON, Anna ,  ZHAO, Su ,  BERTOCCHI, Francesco ,  MULATTIERI, Matteo

IPC: H01B1/02 ,  H01B1/026

Abstract: The present disclosure relates to an electrical contact (1) comprising a substrate (5) of an electrically conductive material, and a graphene-copper composite coating (6) on the substrate. The graphene content in the coating is within the range of 0.1 to 2 wt%.

公开(公告)号：WO2018189146A1

公开(公告)日：2018-10-18

申请号：PCT/EP2018/059104

申请日：2018-04-10

Applicant: ABB SCHWEIZ AG

Inventor： ANDERSSON, Anna ,  TAHER, Mamoun ,  TAHERSHAMSI, Leili ,  GRENNBERG, Helena ,  JANSSON, Ulf ,  WÅHLANDER, Martin

IPC: B22F1/00 ,  C22C32/00 ,  C22C26/00 ,  H01H1/023 ,  H01H11/04 ,  H01H1/025

Abstract: The present disclosure relates to a metal-graphene composite product in the form of a sliding contact of an electric power application, in which graphene flakes are dispersed in a matrix of the metal, as well as to a method for obtaining such a composite product.

公开(公告)号：WO2022238055A1

公开(公告)日：2022-11-17

申请号：PCT/EP2022/059227

申请日：2022-04-07

Applicant: ABB SCHWEIZ AG

Inventor： ANDERSSON, Anna ,  ZHAO, Su

IPC: H01H1/027 ,  H01H1/025 ,  H01H1/42

Abstract: The present disclosure relates to an electrical contact (1) comprising a substrate (3) of an electrically conductive non-silver material, and an electrically conductive metal- graphene composite coating (4) directly on a surface (5) of the substrate.

公开(公告)号：WO2020074552A1

公开(公告)日：2020-04-16

申请号：PCT/EP2019/077292

申请日：2019-10-09

Applicant: ABB SCHWEIZ AG

Inventor： ANDERSSON, Anna

IPC: C25D3/46 ,  C25D7/00 ,  C25D15/02

Abstract: The present disclosure relates to a method of electroplating of a silver- graphene composite onto a substrate (1). The method comprises preparing a plating bath (6) comprising: a dissolved water soluble silver salt, dispersed graphene flakes (3), and an aqueous electrolyte (2) comprising a silver complexing agent, a cationic surfactant, and a pH adjusting compound. The zeta potential of the graphene-electrolyte interface in the plating bath is adjusted to be positive and within the range of 10-30 mV by means of the cationic surfactant and the pH adjusting compound. The method also comprises applying a negative electric potential on the substrate surface (4) such that electrophoresis of the graphene flakes occurs and said flakes are co-deposited with the silver during electroplating thereof to form a silver-graphene composite coating on the substrate surface.