They’re very different, and there are many possible types of both. To guess at what you want to know:
I don’t expect Na-ion batteries to replace Li-ion.
Flow batteries have separate costs for power and capacity, while those are linked in Li-ion and Na-ion. Flow batteries only make sense when charging and discharging over at least a few hours.
I’ve seen a couple of videos about the relative strengths and weaknesses of different battery technologies but don’t know anything about flow batteries. Mostly interested in whether sodium-ion would be better than flow batteries for grid storage. That video claims sodium-ion batteries are projected to have $52/kWh production cost in 2025 based on various industry projections (timestamp 30:47) with a speculative $40/kWh in 2030.
Are you saying sodium-ion won’t replace lithium-ion even for grid storage, and why?
Those projected numbers seem to just be made up, extrapolated from graphs and hopes by consultants rather than based on proper techno-economic analysis.
I don’t expect Na-ion to be cheaper than Li-ion. The disadvantages seem to outweigh lower material costs.
In your view how do flow batteries compare with sodium-ion?
They’re very different, and there are many possible types of both. To guess at what you want to know:
I don’t expect Na-ion batteries to replace Li-ion.
Flow batteries have separate costs for power and capacity, while those are linked in Li-ion and Na-ion. Flow batteries only make sense when charging and discharging over at least a few hours.
I’ve seen a couple of videos about the relative strengths and weaknesses of different battery technologies but don’t know anything about flow batteries. Mostly interested in whether sodium-ion would be better than flow batteries for grid storage. That video claims sodium-ion batteries are projected to have $52/kWh production cost in 2025 based on various industry projections (timestamp 30:47) with a speculative $40/kWh in 2030.
Are you saying sodium-ion won’t replace lithium-ion even for grid storage, and why?
Those projected numbers seem to just be made up, extrapolated from graphs and hopes by consultants rather than based on proper techno-economic analysis.
I don’t expect Na-ion to be cheaper than Li-ion. The disadvantages seem to outweigh lower material costs.