What's the most energy-dense and currently commercially available chemical battery technology? Would it be the Lithium-Ion Polymer or has it been surpassed already?

There's is a chemical non-rechargeable battery which is more energy-dense than LiPo, even if it's less power-dense?

I'm trying to have a general sense of the current state-of-the-art technology, as the Wikipedia articles and tables seems to be very dated.

Edit: I meant "dense" as in respect to mass. I believe that "specific energy" would be the right terminology.


This has a list of common battery types with energy densities.

Lithium ion primary batteries appear to have the highest specific energy at around 300 Wh/kg. Lead-acid batteries have a specific energy around 10% that of lithium-ion batteries, but are extremely reliable (depth of discharge, self-discharge, etc.), and do not have nearly the same heating/fire issues (though they can explode if you mess with them), which is one of the reasons they have endured so long in automotive applications.

More exotic chemistries have higher specific energies, but I am unsure as to whether they are available to the average consumer.

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  • $\begingroup$ Lithium-air batteries are NOT production-ready. $\endgroup$ – permeakra Nov 16 '15 at 18:39

Not neccesarily truth, I don't have exhausting knowledge in the area

What's the most energy-dense and currently commercially available chemical battery technology

Assuming we talk about energy per mass unit.

In case one doesn't care about reversibility, it is air-metal batteries (say, alumunium-air). In case one does, it is probably Lithium-sulfide batteries.

Both are inferiour to common internal combustion engine, though.

Assuming we are talking about power per mass unit

Lead batteries are close to top, AFAIK. Otherwise they would be pushed out from cars already.

  • $\begingroup$ Do you know of any commercially available air-metal battery? $\endgroup$ – Bernardo Donadio Nov 16 '15 at 21:50
  • $\begingroup$ microbattery.com/zinc-air-battery-specs || zinc-air batteries are definitely available, see the link. They are faaar inferrior to potential of aluminium-air batteries, but still beat any rechargeable Li batteries. Aluminium-air batteries were announced to be produced this spring and are said to be used in various prototypes, but no other relevant traces in the web were found. $\endgroup$ – permeakra Nov 16 '15 at 22:04
  • $\begingroup$ This would be a decent answer if it contained some actual numbers not vague hand waving opinions and it referenced whether the tech was a prototype or a commercial product. $\endgroup$ – matt_black Jan 15 '16 at 23:01
  • $\begingroup$ @matt_black I converted it to community wiki, feel free to fill in the details. The numbers can be pulled from Wikipedia. $\endgroup$ – permeakra Jan 16 '16 at 15:03

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