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Lithium Iron Disulfide Battery Chemistry

  1. Mar 11, 2010 #1
    I've been researching Lithium Iron Disulfide Batteries, but I've been unable to find the half-equations for the Cathode and Anode.

    Cathode - Iron Disulfide
    Anode - Lithium
    Electrolyte - Organic Solvent Blend (Propylene Carbonite, Dioxolane, Dimethoxyethane)

    The overall equation is,

    4Li + FeS(2) --> Fe + 2Li(2)S

    Any help would be greatly appreciated.

    Thanks in advance.
  2. jcsd
  3. Mar 12, 2010 #2


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    Staff: Mentor

    No idea what is exactly happening in these batteries, but just looking at overall equation it is obvious what is getting oxidized and what is getting reduced, so half reactions seem pretty straghtforward.

  4. Mar 12, 2010 #3
    Not for me, I've not done chemistry since GCSE :S

    Anyway, this is what I've come up with,

    Li --> Li(+) + e-


    FeS(2) + 4Li(+) + 4e- -- > Fe + 2Li(2)S

    How do they look?

  5. Mar 12, 2010 #4


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    Staff: Mentor

    First one - lithium oxidation - is OK. There is a problem with the other one, as you have mixed both half reactions together. You need something like FeS2 -> Fe + S22-, just balanced with electrons so that charge is identical on both sides.

  6. Mar 12, 2010 #5
    Ok, thanks for that.
  7. Jul 9, 2010 #6
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