Ceramic Fuel Cells Limited (CFC) says it has made further significant advances in its development of more powerful and durable fuel cell modules for micro CHP products.
The company claims to have developed an advanced anode supported fuel cell with power densities of 500 650 mW/cm2, from 350 mW/cm2 an increase of 50% in 12 months, and at an electrical efficiency of more than 50%.
The improved power density has allowed Ceramic Fuel Cells to increase the power output of its commercial stack design, which runs on natural gas, from 1kW to 2kW, whilst significantly reducing the cost per kW of the fuel cell module.
Fuel cell stack lifetime has also improved significantly, they say, with degradation reduced by 35% to less than 1% / 1000 hours, when operating a 1kW stack in a test station at 750oC on natural gas.
CFC says these results have been achieved through advances made in cells, glass technology, interconnect metals, protective coatings on metals and contact technology. For instance, the company’s patented spinel coating is highly effective at increasing the lifetime of the stack by eliminating chromium emission from stainless steel, which can affect all solid oxide fuel cells.
Ceramic Fuel Cells’ testing has demonstrated electrical efficiencies of more than 66% for a mini fuel cell stack of three cells and more than 50% for a complete 1kW fuel cell stack running on natural gas.
The advanced components will be used in mCHP products that CFC is developing with its appliance partners in Germany, France, the United Kingdom, Holland and Japan.