Battery knowledge · Other and emerging chemistries

Seawater battery

A battery that uses seawater as its electrolyte or positive reactant. Seawater-activated primaries, such as magnesium–silver chloride cells, sit dry for years and start when immersed, powering sonobuoys and life-jacket lights. Rechargeable versions pull sodium ions from seawater through a NASICON ceramic into a sealed negative electrode, with oxygen reactions on the open seawater side.

Also called
seawater-activated battery, rechargeable seawater battery

Example

Other and emerging chemistries: an example situation

Two chemistries can meet the same energy target with different voltage windows and charge termination.

Read Seawater battery alongside Aqueous battery in this context. Any battery whose electrolyte is water-based, from lead–acid and nickel–metal hydride to aqueous zinc-ion and sodium-ion designs. Water is cheap, non-flammable and highly conductive, but it splits at 1.23 V in theory and around 2 V in practice, which caps cell voltage and energy density.

Use in Lemonergy

Do not carry lithium-ion assumptions into every chemistry.

This is a reference concept. No executable Lemonergy block has been verified for this term.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

  1. Promise and reality of post-lithium-ion batteries with high energy densities

    Jang Wook Choi, Doron Aurbach · Nature Reviews Materials · 2016

    Topic background · Post-lithium-ion materials and battery concepts, including practical cell-level limitations; historical 2016 perspective.

  2. DOE/EPRI 2013 Electricity Storage Handbook in Collaboration with NRECA

    Sandia National Laboratories · 2013

    Topic background · Storage technologies and grid services. The publisher notes that its historical cost and deployment figures are outdated.