Defoaming method of membrane electrode catalyst slurry, slurry prepared by defoaming method and membrane electrode catalyst layer

• Main Authors: CHAO WEI, WU XINXIN, GONG ZHENGWEI, HOJO TAKEMASA, CHEN XUESONG
• Format: Patent
• Language: Chinese; English
• Published: 07.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SEPARATION; TRANSPORTING

The invention provides a defoaming method of membrane electrode catalyst slurry, the slurry prepared by the defoaming method and a membrane electrode catalyst layer, and relates to the technical field of fuel cells. The defoaming method of the membrane electrode catalyst slurry comprises the following steps: sequentially carrying out primary defoaming and deep defoaming on the membrane electrode catalyst slurry to obtain the defoamed membrane electrode catalyst slurry; both the primary defoaming and the deep defoaming are stirring defoaming, and the stirring revolutions of the primary defoaming are 2-5 times of the stirring revolutions of the deep defoaming. Therefore, the preliminary defoaming in the defoaming method is high-speed defoaming, the preliminary defoaming effect can be achieved, and aggregation and sedimentation can be effectively prevented; and the stirring revolution of the subsequent deep defoaming is 2-5 times lower than that of the preliminary defoaming, and the defoaming is low-speed defoam