Method for prolonging service life of high-temperature proton exchange membrane fuel cell stack

• Main Authors: ZHENG BOWEN, JI FENG, LUO RUOYIN, LIU YONG, DU WEI, DENG CHENGWEI
• Format: Patent
• Language: Chinese; English
• Published: 23.08.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a method for prolonging the service life of a high-temperature proton exchange membrane fuel cell stack, which comprises the following steps of: controlling the inlet temperatures of a cathode and an anode at 120-160 DEG C, regularly exchanging the gas inlet directions of the cathode and the anode, and simultaneously changing the inlet and outlet positions of the cathode and the anode. According to the method provided by the invention, on one hand, the problem of rapid loss of phosphoric acid caused by local liquid water generated in the starting and running processes due to the fact that the local temperature of the galvanic pile is lower than 100 DEG C under low-temperature gas feeding is avoided; on the other hand, the problems that the loss rate of phosphoric acid in an electrolyte membrane is accelerated and the loss of phosphoric acid is too fast due to the fact that the inlet positions of the cathode and the anode of the galvanic pile are located at high current density for a l