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Thread: Sodium-Sulfur battery will replace Li-ion?

  1. #1 Sodium-Sulfur battery will replace Li-ion? 
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    Some researchers report room temperature Sodium-Sulfur batteries with 450 Wh/kg energy density and long cycle life.
    Is it plausible? Will they replace Li-ion anytime soon?
    http://pubs.acs.org/doi/10.1021/jz500848x
    https://www.researchgate.net/publica...porous_Carbons


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  3. #2  
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    Quote Originally Posted by Stanley514 View Post
    Is it plausible? Will they replace Li-ion anytime soon?
    No time soon. To challenge li-ion they have to demonstrate:

    - Lifetime. Must be >1000 cycles above 70% or so.
    - Manufacturability. You have to be able to make them in quantity.
    - Discharge rate. For most applications you need the ability to discharge at 2C or more.
    - Charge rate. Need at least 1C.
    - Energy efficiency. Need at least 80% coulombic+voltage efficiency.
    - Safety.

    So they have a lot of work to do. But in ten years? Might start to be an option.


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