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Those are not necessary. Solid oxide fuel cells use neither. In the long run, PEM fuel cells likely will use neither too, or very little (on the order of grams
by _hypx 4y ago
Those are not necessary. Solid oxide fuel cells use neither. In the long run, PEM fuel cells likely will use neither too, or very little (on the order of grams per fuel cell).
- pfdietz 4y agoSOFCs use zirconium or cerium as well as nickel conductors. To be efficient, they need to be the topping cycle of a combustion turbine, so they also need strong turbine blade alloys, which involve nickel.
- _hypx 4y agoNone of these materials are really that limited. Not even nickel at the scale you’re imagining them to be. Remember, we’re looking at grams of such things, and they can easy be swapped out with some other material. Also, you do not need a combustion turbine at all. You can envision fuel cells with near 100% efficiency in the long run.
- pfdietz 4y agoIf these materials aren't limited, neither are the ones for batteries, so why do you imagine these supposed limitations will be solved by going to hydrogen cars?
- _hypx 4y agoAgain, we are talking about grams of such materials per fuel cell. All of which are readily substitutable. Meanwhile, all of the materials for batteries are in the kilograms, up to hundreds of kilograms for larger vehicles. Many of which cannot be substituted that easily. Ultimately, you will realize that the leap from batteries to fuel cells is not that difficult. It’s smaller than the leap from ICE to batteries after all. So if there is an alternative way of making an EV that uses much less resources, it will be adopted.