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Model of Performance of a Regenerative Hydrogen Chlorine Fuel Cell for Grid-Scale Electrical Energy Storage
 

Summary: Model of Performance of a Regenerative Hydrogen Chlorine Fuel Cell for
Grid-Scale Electrical Energy Storage
Jason Rugolo, Brian Huskinson, Michael J. Aziz
Harvard School of Engineering and Applied Sciences, Cambridge, MA 02138, USA
We develop a model for a regenerative hydrogen-chlorine fuel cell (rHCFC)
including four voltage loss mechanisms: hydrogen electrode activation,
chlorine electrode activation, chlorine electrode mass transport, and ohmic
loss through the membrane. The dependences of each of these losses as
a function of two "operating parameters", acid concentration and temper-
ature; and five "engineering parameters", exchange current densities at
both electrodes, membrane thickness, acid diffusion layer thickness, and
cell pressure, are explored. By examining this large parameter space, we
predict the design target and ultimate limitations to the performance char-
acteristics of this cell. We identify chlorine electrode activation as the
dominant contribution to the loss for low current density, high-efficiency
operation and membrane resistance as the dominant contribution to the
loss at maximum galvanic power density. We conclude that a "dream"
cell should be attainable with further research that operates at greater than
90% voltage efficiency at current densities >1 A
cm2 in both electrolytic and

  

Source: Aziz, Michael J.- School of Engineering and Applied Sciences, Harvard University

 

Collections: Physics; Materials Science