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Alkaline Fuel Cell Membrane Delivers Promise of Affordable Fuel Cells
Nafion replacement will enable non-precious metal catalysts at 99% reduced cost
By: Full Cycle Energy
These metals cost between $2 and $12 per ounce as compared to platinum that currently trades in the range of $1,200/ounce and peaked at over $2,000/ounce last summer. As this innovation is commercialized it will lead to a massive drop in the cost of goods needed to produce fuel cells. This price reduction will allow fuel cells to have a lower price point per watt than internal combustion engines and batteries. Currently fuel cells are considered to be superior to internal combustion engines and batteries in terms of size, weight, temperature, noise, safety, scalability and carbon footprint. Fuel cells are currently used to power backup generators, unmanned aerial vehicles (UAV’s), scooters, golf carts, cell phones, laptops, emergency generators and in fuel cell / electric vehicles like the Honda FCX Clarity.
Despite the many advantages and demonstrated uses of fuel cells, they are expensive because they require platinum and other precious metals as catalysts. The best way to eliminate platinum while maintaining the many benefits is through the use of a high performance hydroxide exchange membrane, the Nafion® equivalent for a alkaline fuel cell. Recently, Dr Yan’s lab has demonstrated a power density of 250 mW/cm2 using an alkaline membrane composed of quaternary phosphonium based polymers. His team expects to improve this in the near future.
By switching from an acidic medium to a basic one, hydroxide (OH-) exchange membrane fuel cells (HEMFCs) have the potential to solve the problems of catalyst cost and durability while achieving high power and energy density. In a basic environment, the cathode oxygen reduction over-potential can be significantly reduced, leading to high fuel cell efficiency, and non-precious metals can be used as catalysts which are also more durable in a basic medium. Further, HEMFCs can offer fuel flexibility using hydrogen, methanol, ethanol, ethylene glycol, and other inexpensive, easily produced and biodegradable fuels because of their low overpotential for hydrocarbon fuel oxidation and reduced fuel crossover. “This is a breakthrough that will make fuel cells so efficient and inexpensive that it will revolutionize energy conversion and storage on a global scale.” said Dr. Yan.
Dr. Yan and UC Riverside have licensed this invention to Full Cycle Energy, a California start-up that is leading the revolution in low-cost high-durability fuel cell technology. Currently Full Cycle is commercializing another of Yan’s inventions, a platinum nanotube fuel cell catalyst (PtNT) that reduces cost by 2/3 and increases durability by a factor of 10. Production of PtNT is currently being scaled up for integration into a range of fuel cell products. According to CEO Andrew Behar, “The only thing stopping fuel cells from replacing fossil fuels and batteries is cost and durability. Dr. Yan’s innovations will enable a world powered by inexpensive, clean and abundant energy.”
Bio of Yushan Yan, Ph.D.
Professor, Chemical and Environmental Engineering, University of California, Riverside; Inventor of core patents. Professor Yan (44) received his B. S. in Chemical Physics from the University of Science and Technology of China in 1988, and his M. S. and Ph.D. in Chemical Engineering from the California Institute of Technology in 1995 and 1997, respectively. He worked for AlliedSignal Inc. as a Senior Staff Engineer from 1996 to 1998. He came to the University of California, Riverside in 1998 as Assistant Professor. He became Associate Professor in 2002 and Professor in 2005. He was given the title of University Scholar in 2006. His research has been widely cited in the scientific community and also frequently covered by the news media including New Scientist, Business Week, and CNBC
Link to publication in Angewandte Chemie
CEO and President
Full Cycle Energy
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About Full Cycle Energy:
Full Cycle Energy is a California based technology start-up that has licensed two major innovations that will reduce the cost and increase the durability of fuel cells to enable mass commercialization in many markets. These innovations are critical components to spark an energy revolution and enable the rapid shift from fossil fuels to abundant clean energy. www.fullcycleenergy.com
Page Updated Last on: Aug 19, 2009