In my limited understanding, I believe it's both. A fuel cell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent. Therefore if there is fuel in it, it's generating electricity. If the fuel is sitting in a tank beside it, it's storage... I think my interpretation is a somewhat liberal interpretation of those ideas. And I don't know what what maintenance is required. Eg Is it bad to leave it dry for long periods of time? Is it bad to leave it full when idle for long periods of time? But back to my point, potentially you could use it in both ways.
I'm curious to hear the opinions of someone who knows more on the topic than me.
Though its broad practicality is questioned outside artistic creations,
This absolutely could be used in all sorts of scenarios. In the most direct sense, it could be used to form wireframes for which other methods build on top of. It could even do traditional 3D printing without any change in equipment.
Every limitation that I can think of or have seen written here can easily be solved. This is a good idea.
I've included a time-line to help you find the key moments in the video. But what I find really interesting when watching the video again is to watch our process for solving the problem, the tangents we explored, and the fact that the challenge put up much more of a fight than I expected."
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That means it’s becoming increasingly difficult for the world to meet its professed goal of limiting global warming to 2C (3.6F) above pre-industrial levels.