 Hydrogen ion batteries
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Conundrum
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Sat Nov 16 2013, 01:36PM
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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
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Hi all.
Found this when looking for something unrelated.
Seems that the material mentioned is a compound stable at room temperature and pressure yet when heated evolves hydrogen as H2 gas.
It is somewhat reversible so could provide the basis for a hydrogen-ion battery in much the same way as a lithium-ion.
The construction of this would be Al2CuHx on the anode and a related compound on the cathode.
In fact both could be used at different hydrogen loading states for a fully reversible cell which would be stable under nearly all conditions.
No issues with overdischarge here as the reaction is fully ionic, specialist carbon could then be used as a carrier on both sides
and as a current collector to reduce costs and eliminate copper shunt which is the bane of many Li chemistries.
Also as H2 is substantially lighter than Li the power density would be equal to Li-Ion if not more so.
Assuming a loading of 6 H to 1 Al2Cu molecule would double the density of the best CoO2-Li cells with few if any disadvantages while using the same construction techniques and production plants.
-A
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Erlend^SE
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Registered Member #1565
Joined: Wed Jun 25 2008, 09:08PM
Location: Norway
Posts: 159
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Seems like a evolution on the NiMH(Nickel Metal Hydride) chemistry at best.
They use hydrogen trapped within metal as one of the electrodes.
Able to confirm / deny that understanding of it?
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Conundrum
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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
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Its very similar but not quite, in this case the H intercalates into the electrode fully like the Li on a Li-Ion battery.
NiMH is still an electrochemical system as the NiOH changes shape.
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