1
$\begingroup$

The title says it all, I'm searching for the chemical equation to the lithium iron phosphate battery.

I know that the cathode is made of $\ce{LiFePO4}$ and that upon discharging, it is transformed to $\ce{FePO4}$. The Anode is made of graphite.

So I think that the reaction on the anode is: $\ce{LiFePO4 -> FePO4 + Li+ + e-}$

Is this correct? If so, what's happening on the anode?

$\endgroup$
1
$\begingroup$

Close, the cathode reaction is:

$$ \ce{LiFePO4 -> FePO4 + Li^+ + e^-}$$

The anode is:

$$\ce{Li^+ + C6 + e^- -> LiC6}$$

The best description I can give is that the lithium ion intercalates into the graphite and "steals" some electron density from the six-membered conjugated ring.

$\endgroup$
  • $\begingroup$ Just to clarify, we call the LFP/FP electrode the "cathode" regardless of whether it's charging/discharging. It's sloppy terminology but that's the way the it is. $\endgroup$ – m3wolf Jan 13 '17 at 0:43

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.