UK-based ACAL Energy reports that in testing of its platinum-free liquid cathode system, FlowCath, a full-scale stack was subjected to extreme load and rapid thermal cycling, from zero to 1A/cm2 load cycles and from 20 to 80 °C with no measurable change in performance seen in over 400 load cycles and 100 thermal cycles.
ACAL Energy has been carrying out representative drive cycle tests in response to requests from automotive manufacturers. Drive cycle issues are known to cause deterioration of conventional PEM fuel cells. To date, ACAL Energy has reached close to 2,000 hours of cumulative testing.
Reducing the cost of achieving durability is key to successful deployment of fuel cells in mass market automotive applications, and by avoiding expensive engineering designs, the Pt-free FlowCath system will allow vehicle manufacturers to accelerate progress to supplying affordable fuel cell vehicles, the company says.
ACAL Energy’s technology is based on thermodynamically stable homogeneous catalysts. These catalysts have been in regular use for over three years in multiple test cells and systems, and the Company has seen no instance of catalyst deterioration throughout a battery of single cell, stack and system testing programs.
The company continues to accumulate data on its systems, including the fully integrated stationary back up power system located at the Solvay Interox site at Warrington.