Currently some people focus the scale-up of Li batteries, while others shift to other style batteries, such as Na-air batteries. What is your view?
The comparison is not possible; Li-ion (lithium-cobalt oxide chemistry) and related Lithium-ion capacitor and Lithium-iron phosphate batteries are closed-cell type.
Li-air and Na-air are open-cell, therefore has much more limitations (like reliability of fan, safety and work in extreme environment like high-altitude, underwater or in space). But open-cell batteries has superior energy density.
As i understand, Na-air is being developed primarily for light-weight, low-cost electric cars..Li-ion batteries for electric cars is too heavy and expensive. Li-air batteries are lightest, but quite expensive.
There is not much papers about Na-air battery because research is in early phase;
you can see attached file
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