In the past, scientists have been looking for polymer fuel cell solutions suitable for temperatures above 100°C, so that the battery can maintain high performance in hot and dry conditions without spending a lot of effort on maintaining the cooling system. Now American scientists have developed an operating temperature medium. Polymer fuel cells that can be installed in trucks and buses at 80~160°C.
Fuel cells mainly convert chemical energy in fuel into electrical energy. The most common fuel is hydrogen, that is, hydrogen fuel cells that can be used in automobiles, aviation and railway systems. However, there are many different fuels in fuel cells. The common point is The pollution to the environment is less than that of batteries and fossil fuels, which has attracted much attention in recent years.
However, if the current fuel cell is to operate at an ambient temperature of 80~160°C, it is necessary to add equipment such as a large radiator and an air inlet to maintain cooling. Therefore, scientists imagine that it is better to start developing fuels with an application range of 100°C or more. Batteries, enabling easier-to-operate fuel cell systems through better thermal and water management.
Now Los Alamos National Laboratory (Los Alamos National Laboratory) has developed high-temperature polymer electrolyte membrane fuel cells (polymer electrolyte membrane fuel cells). Phosphoric acid is mainly used as the electrolyte, but the research team replaced them with phosphonated polymers and perfluorosulfonic acids, and the temperature range is also up to 80~160℃.
The new polymer comes from phosphonated polymer and perfluorosulfonic acid. The research team found that the proton in perfluorosulfonic acid will be transferred to the phosphonated polymer, which significantly improves the proton conductivity. The rated power density of the fuel cell is as high as 800 at 160 °C. mW/cm2, which is 60% higher than that of phosphoric acid-based fuel cells.
The research team is optimistic about the development of fuel cells in the future. The team believes that, like other electric vehicles, fuel cell vehicles are also zero-emission future vehicles that will not emit any carbon dioxide or suspended particulates, said Yu Seung Kim, a synthesis and integration facility at Los Alamos National Laboratory. , countries can also produce their own hydrogen, with zero greenhouse gas emission potential.