[stephengillie]

My understanding (from reading the article) is that the single Li-ion battery lasted for a week.

Considering that these are extremely common metals, I can't see why this wouldn't be viable, even with anode/cathode degradation.

[DannoHung]

Maybe? The article was actually a little unclear on that. They may not have been able to run the experiment longer than a week. The only comparison they provide is the conventional catalyst which degraded significantly within 30 hours of operation.