Top Ten Reasons
to Invest Now in Fuel Cells and
the Hydrogen Economy

Click Here

Search 1000+ Articles on This Site

GE's Low Cost Solid Oxide Fuel Cell

Source: MIT Technology Review

GE’s new solid-oxide fuel-cell prototype achieves a cost breakthrough thanks to a low-cost manufacturing process that assembles ceramic and electrolyte layers. The six-kilowatt device, which converts hydrocarbon fuel to electricity at an efficiency of 49 percent, is currently being evaluated by the U.S. Department of Energy for possible use for power generation in future coal-gasification plants.

One of the most efficient ways to produce power at future coal-gasification power plants is with solid-oxide fuel cells, which use the hydrogen from the gas stream to generate electricity through chemical reactions. This is more efficient than simply combusting the gas stream from coal gasification. And unlike other types of fuel cells, the solid-oxide variety can operate at very high temperatures and efficiencies, and be scaled up to provide cities with power.

But among the various challenges to developing the technology, manufacturing cost has been a potential deal breaker. Now, researchers at GE have demonstrated a manufacturing method that assembles layers of ceramic and electrolyte materials cheaply so that the final product can be built for about $800 a kilowatt, which starts to approach the $500-to-$550-per-kilowatt cost of building a conventional gas-fired power plant.

GE's six-kilowatt prototype achieves 49 percent efficiency in converting fuel into electricity, which compares favorably with the 35 percent efficiency of conventional coal-burning power plants. "I do believe GE has established a new state of the art," says Wayne Surdoval, technology manager for fuel cells at the National Energy Technology Laboratory, part of the U.S. Department of Energy, which is funding this project and others aimed at producing better solid-oxide fuel cells. "The bottom line," he adds, is tha