this post was submitted on 11 Jun 2024
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It depends a lot on where the hydrogen is sourced from. Hydrogen that is generated from electrolyzers using renewable power is completely green (and funny enough, called Green Hydrogen), and is a good way to store excess energy from solar and wind.
Oil companies however want to market hydrogen from drilling and refining, which is dirty as hell.
It's an important differentiation to make though. Hydrogen is not inherently bad and will have plenty of green applications. We just have to make sure it's coming from the right places.
Is it really that good of a storage method, though? The round-trip efficiency is quite bad when compared to other methods of storage.
We'll need it anyway to produce existing chemical materials sustainably. It may not be the best energy carrier nor most efficient, but it shines in specific applications. Vehicles are a promising example.
There are some use-cases where hydrogen will be useful, but I don't think storage is one of them. Nor do I think vehicles are a particularly good use-case either, as compared to just iterating on battery technology.