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I wouldn't be so sure.

First, CATL is a Chinese activity, well-known across industry to be fueled with the end products of industrial espionage- I wouldn't trust their shit to power a flashlight.
Second, even this group openly concedes that 12kWh/kg is purely theoretical at this point, as their current prototype arrays are only doing a tenth of this projected performance. They have a long way to go.
Third, hype is all good with a proven product that's market-ready, but when false hype on YT by third-party fanboys & influencers flood the space, it does far more harm to any advances in the state of the art than it does good.

https://interestingengineering.com/energy/catl-12000-wh-kg-lithium-air-ev-battery
There's a neat trick where you catch the end of an aluminum wire on fire (presumably using electric arc) and then plunge it into water and it yanks o2 off of the water making a whole lot of h2.

It leaves alumina sludge in the water which you need to take to an aluminum smelter to get it back to it's original state.

IIRC the round trip efficiency is quite abysmal because the aluminum smelting process is insane.
I want to do that but with a carbon anode.

Cathode makes H2, anode makes CO2, very small electrical input to drive the reaction.

If that can be figured out, then you can make H2 with charcoal.

That's CO2 + 2H2, and if you use a traditional H2 electrolyzer to make another 50% of H2, then you can do CO2 + 3H2 -> CH3OH + H20, and that's methanol which is quite useful.
The problem is the carbon doesn't want to react. It actually makes great electrode material because it generally does not react. What's needed is an oxidizer like ferrate or permanganate which can oxidize the C (becoming metal), but the electrolysis chemistry will re-generate it again.

This is the part nobody has solved...
What I'd like to do is create a sink for consuming solar energy in the summer. Take charcoal made from hay -> generate methanol and store it.

One interesting reaction you can do with methanol is this thing: https://en.wikipedia.org/wiki/Gas_to_liquids#Methanol_to_gasoline_(MTG)_and_methanol_to_olefins

It generates a bunch of heat, so you can run that reaction in the winter and heat the house with it, and the output is *surprisingly* similar to 87 octane gas, given it doesn't involve any kind of fractional distillation.

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