The GREENROCK Saltwater battery is based on a sodium-ion technology that behaves similarly to lithium-ion batteries.As you can see here, it has the same components of a lithium-ion battery. The only difference is that it is based on sodium ions, not lithium ions like Tesla’s battery. Also, every material used is non-toxic and environmentally friendly.
Despite working the same way, it differentiates itself from other technologies. This battery can work at ambient temperature and, unlike some redox-flow-batteries that contain two electrolytes in separate circuits, it only contains one electrolyte which does not circulate.
With all this said, if we compare it with other technologies, we can see in this graph that this battery has disadvantages, such as energy density (for the amount of energy that it stores, the battery is big) and C-rate (takes too long to charge and discharge), but it is extremely safe, sustainable and there is not a lot of charge that is removed from the fully charged battery.
This battery does not have a pretty big market, having only sold 250 batteries in 2017 for around 850 - 1100 euros per kWh. It is sold directly to the customer and it is a good option for people that live far from civilization, where power doesn’t usually reach.
