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by rewma
1714 days ago
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> can you name the sustainable sources of hydrogen, and their efficiency? Hydrogen is an energy store.
It doesn't typically exist by itself in nature and must be produced. Thus the answer for your question is any and all renewable energy sources. https://www.energy.gov/eere/articles/hydrogen-clean-flexible... Neither electricity nor pre-charged Li-Ion batteries exist in nature by themselves, thus it's precisely the same problem. |
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I know hence the question.
to answer my question, which is also in the article you've kindly posted:
"Currently, most hydrogen is produced from fossil fuels, specifically natural gas"
Which is the point I'm getting at. Its cheaper to split natural gas than it is to do electrolysis.
What I have discovered is that state of the art electrolysis is about 80% which is far higher than I had remembered. Alas, fuel cells are still 40-60% efficient, so we could still be looking at terrible round trip efficiency.
Hydrogen might one day be the storage medium of choice, but its not yet. I suspect we'll have working fusion before we have practical grid scale hydrogen, let alone wide scale hydrogen cars.