Reply to post:

Boffins step into the Li-ion's den with sodium-ion battery that's potentially as good as a lithium cousin

Quenda

Lithium is only a small part of the cost of a Li-ion battery. Even if the lithium raw material was free the cost savings would be <10% off the cost of a battery. These guys should focus on performance (longer life, power density, better electrodes, charging times, safety etc) if they want to replace lithium - not likely to happen on economics alone.

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