Preparation method of cobalt-based cathode of alkaline membrane fuel cell

• Main Authors: YAO ZHAOYU, GE CHUANGXIN, ZHUANG LIN
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a preparation method of a cobalt-based cathode of an alkaline membrane fuel cell. Firstly, a low-valence cobalt-based catalyst is prepared; then dispersing a low-valence cobalt-based catalyst and a quaternized polymer electrolyte to prepare catalyst ink; forming a film from the catalyst ink to obtain a catalyst film; the catalyst membrane is soaked in an alkaline aqueous solution for ion exchange, and low-valence cobalt is oxidized into hydroxyl cobalt oxide in situ by oxygen dissolved in the solution in the ion exchange process; when a film is formed on the polymer electrolyte film, a cathode layer is obtained; and preparing an anode layer on the other side to obtain a membrane electrode, and assembling the membrane electrode into a fuel cell for application. CoOOH is generated in situ in the ion exchange process after low-valence cobalt and N in the polymer are coordinated, the synthesis process is mild, the morphology and the particle size are controlled through a low-valence cobalt