Proton OnSite, which designs and manufactures hydrogen and gas systems, is playing a key role in proliferating those stations with its sister company, SunHydro. Its systems incorporate renewable energy and water to produce a fuel of tomorrow. They use electricity to split hydrogen from water, in fuel cells incorporating catalysts that reduce the energy required, as well as membranes to separate the hydrogen from oxygen and water. The technology is enabled by the membrane’s ability to separate out positive ions.
That membrane acts as both the conductive bridge between the two electrodes for the electrochemical reaction, and the barrier that separates the hydrogen from the oxygen. In conjunction with Proton’s cell design, membrane thicknesses on the order of the diameter of a human hair can separate hydrogen at pressures of over 2,400 pounds per square inch from oxygen at ambient pressure. The traditional process for fabricating synthetic membranes is expensive, and most membranes do not maintain robustness at those high pressures.
Through a National Science Foundation-funded program, Proton OnSite has been developing and testing new membrane materials for increased mechanical strength and higher operational efficiency. The new materials are aimed at replacing current state-of-the-art membranes, with cost, durability and efficiency improvements that would allow their use in energy and fueling markets. The proposed materials, if successful, would represent a 75 percent cost savings over current membranes and enable higher temperature operation for improved efficiency. The result would be deployment of commercial technology that could help revolutionize the way we fuel our cars and reduce our carbon footprint.