公开(公告)号：US11367878B2

公开(公告)日：2022-06-21

申请号：US16309090

申请日：2017-07-31

Applicant: BALLARD POWER SYSTEMS INC.

Inventor： Rajesh Bashyam ,  Ping He ,  Siyu Ye

IPC: H01M4/86 ,  H01M4/90 ,  H01M8/10 ,  H01M8/1004 ,  H01M4/92

Abstract: A membrane electrode assembly comprises a polymer electrolyte interposed between an anode electrode and a cathode electrode, the anode electrode comprising an anode catalyst layer adjacent at least a portion of a first major surface of the polymer electrolyte, the cathode electrode comprising a cathode catalyst layer adjacent at least a portion of a second major surface of the polymer electrolyte; at least one of the anode and cathode catalyst layers comprising: a first catalyst composition comprising a noble metal; and a second composition comprising a metal oxide; wherein the second composition has been treated with a fluoro-phosphonic acid compound.

公开(公告)号：US11239471B2

公开(公告)日：2022-02-01

申请号：US16336462

申请日：2017-09-29

Applicant: Ballard Power Systems Inc.

Inventor： Siyu Ye ,  Alexander Man-Chung Leung ,  Kyoung Bai ,  Dustin William H. Banham ,  Alan Young

IPC: H01M4/86 ,  H01M8/1004 ,  H01M4/88 ,  H01M4/90 ,  C08F214/26

Abstract: A membrane electrode assembly including: an anode electrode; a cathode electrode; and a polymer electrolyte membrane; wherein the cathode includes a first cathode catalyst sublayer including a first precious metal catalyst composition and a first ionomer composition including a first ionomer and a second ionomer; and a second cathode catalyst sublayer including a second precious metal catalyst composition and a second ionomer composition including a third ionomer; wherein the first ionomer is different from the second ionomer in at least one of chemical structure and equivalent weight.

公开(公告)号：US11431014B2

公开(公告)日：2022-08-30

申请号：US16633526

申请日：2018-07-17

Applicant: Ballard Power Systems Inc.

Inventor： Rajesh Bashyam ,  Ping He ,  Siyu Ye

IPC: H01M8/1004 ,  H01M4/86 ,  H01M4/88 ,  H01M8/102 ,  H01M8/10

Abstract: A membrane electrode assembly comprises an anode electrode comprising an anode catalyst layer and an anode gas diffusion layer, a cathode electrode comprising a cathode catalyst layer and a cathode gas diffusion layer, a polymer electrolyte membrane interposed between the anode catalyst layer and the cathode catalyst layer, and a layer comprising a fluoroalkyl-phosphonic acid compound between at least one of the anode gas diffusion layer and the anode catalyst layer, the anode catalyst layer and the polymer electrolyte membrane, the polymer electrolyte membrane and the cathode catalyst layer, and the cathode catalyst layer and the cathode gas diffusion layer.