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Battery based technology requires rare earth minerals which only a few countries control from what I understand. It is also not feasible due to weight to ship b

by _8j50 4y ago

Battery based technology requires rare earth minerals which only a few countries control from what I understand. It is also not feasible due to weight to ship batteries to transfer power, you can only use them near the power source, is that not correct? Desalination is desparately needed, one byproduct is hydrogen: https://scitechdaily.com/efficient-seawater-desalination-and-hydrogen-production-possible-with-new-catalyst/ https://scitechdaily.com/efficient-seawater-desalination-and... Solutions that solve multiple problems and don't disrupt the norm are ideal are they not? I mean, by all means, go to war with fossil fuel companies if your goal is only that but less people to fight means more practical change. I am hoping micro nuclear reactors become all the rage but even then a light fuel you can transport easily (despite the difficulty of efficiently transporting hydrogen) is sort of a battery except you can send lots of it continually.

stephen_g 4y ago
EV batteries don't actually contain rare-earth metals (but fuel-cells and catalytic converters in ICE cars do). Some types of electric motors use them (in the permanent magnets), which is where a lot of the confusion probably comes from.
- enslavedrobot 4y ago
  Fuel cells based in anionic exchange membranes (AEM) don't require rare metal catalysts. They run on nickel-iron catalysts. Latest gen systems meet or exceed the capabilities of proton exchange systems (that require pt or ir). Also, since anionic membranes aren't made of complex fluoropolymers they can be synthesized much more cheaply. Scaling to under 100$/kg. 1 kg of material is around enough to make a megawatt fuel cell unit. Batteries are definitely going to capture the entire wheeled vehicle market but hydrogen tech is set to take a large fraction of the overall energy market.
- _8j50 4y ago
  Electric cars are one thing I disagree with after driving one. I trally think sustainable public transport is ideal for day to day urban tranport needs and charging cars for any longer than 5min in a long roadtrip is not pleasant. But even if EVs are the right approach, hydrogen hybrids that convert hydrogen to battery stored energy or plain hydrogen powered cars where you fill them up like gas make more sense and are less disruptive to existing infra and consumer desires. Just one small example: I don't see a car charging solution for the majority urban people that live in apartments anytime in the near future. I will never sit 45min on a good day or scramble to find a free charging station in random neighborhoods again! Or be stranded because the battery level display doesn't consider X miles means steep winding mountain roads. Let's not make a religion out of energy sources.

by _8j50 4y ago

stephen_g 4y ago

EV batteries don't actually contain rare-earth metals (but fuel-cells and catalytic converters in ICE cars do). Some types of electric motors use them (in the permanent magnets), which is where a lot of the confusion probably comes from.

enslavedrobot 4y ago
Fuel cells based in anionic exchange membranes (AEM) don't require rare metal catalysts. They run on nickel-iron catalysts. Latest gen systems meet or exceed the capabilities of proton exchange systems (that require pt or ir). Also, since anionic membranes aren't made of complex fluoropolymers they can be synthesized much more cheaply. Scaling to under 100$/kg. 1 kg of material is around enough to make a megawatt fuel cell unit. Batteries are definitely going to capture the entire wheeled vehicle market but hydrogen tech is set to take a large fraction of the overall energy market.
_8j50 4y ago
Electric cars are one thing I disagree with after driving one. I trally think sustainable public transport is ideal for day to day urban tranport needs and charging cars for any longer than 5min in a long roadtrip is not pleasant. But even if EVs are the right approach, hydrogen hybrids that convert hydrogen to battery stored energy or plain hydrogen powered cars where you fill them up like gas make more sense and are less disruptive to existing infra and consumer desires. Just one small example: I don't see a car charging solution for the majority urban people that live in apartments anytime in the near future. I will never sit 45min on a good day or scramble to find a free charging station in random neighborhoods again! Or be stranded because the battery level display doesn't consider X miles means steep winding mountain roads. Let's not make a religion out of energy sources.