Lithium Iron Disulfide Battery Chemistry

Click For Summary

Discussion Overview

The discussion revolves around the chemistry of Lithium Iron Disulfide batteries, specifically focusing on the half-equations for the cathode and anode reactions. Participants explore the oxidation and reduction processes involved in the battery's operation, as well as the overall chemical equation.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant seeks the half-equations for the cathode (Iron Disulfide) and anode (Lithium) reactions, providing the overall equation for the battery's operation.
  • Another participant suggests that the half-reactions appear straightforward based on the overall equation, although they admit to lacking detailed knowledge of the chemistry involved.
  • A different participant proposes half-reactions, indicating lithium oxidation and a combined reaction for Iron Disulfide, but expresses uncertainty about their correctness.
  • One participant points out an error in the proposed half-reaction for Iron Disulfide, suggesting that the reactions need to be separated and balanced correctly for charge conservation.
  • A participant shares a reference to a document that may contain relevant information, although they note a potential typo regarding sulfur.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the correct half-reactions, with some expressing uncertainty and others providing corrections or alternative suggestions. The discussion remains unresolved regarding the accurate representation of the half-reactions.

Contextual Notes

There are limitations in the discussion regarding the balancing of half-reactions and the specific details of the chemical processes involved, which remain unclear or contested among participants.

greg136
Messages
9
Reaction score
0
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.
 
Chemistry news on Phys.org
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.

--
methods
 
Borek said:
so half reactions seem pretty straghtforward.

Not for me, I've not done chemistry since GCSE :S

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

Li --> Li(+) + e-

and

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

How do they look?

Cheers
 
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.

--
 
Ok, thanks for that.
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
Replies
1
Views
3K
  • · Replies 21 ·
Replies
21
Views
5K