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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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    Solid state lithium might very well be the next big thing in batteries, with all these car manufacturers going into joint studies with other companies, and even buying up companies who are researching this. SSL is the closest to mass market it would appear, and will be quite powerful. Bold claims about having cars using this ready in 2023 and such, but we'll see... Been soo much hype in science one must always maintain some level of skepticism.
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  5. #4  
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    Quote Originally Posted by SciFox View Post
    Solid state lithium might very well be the next big thing in batteries . . .
    Ion mobility in solid state batteries is still a huge problem, and that will prevent it from being used in EV's until it is solved. And they are a long way from solving it (several orders of magnitude.)
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