Redox Flow Battery Charging: Understand Electrochemistry

Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
Sign up Log in
2 replies · 2K views
cormzy
Messages
6
Reaction score
0
TL;DR
How does DC current in an electrode covert its electrical energy into chemical energy.
I am researching the electrochemistry of redox flow batteries, however, I do not understand the charging process.
As I understand DC current arrives in an electrode and transfers energy to excite electrons in the electrolyte thus providing energy to trigger a chemical reaction (storing electrical energy as chemical energy).
I am desperate to understand this concept and any help would be invaluable!
Many thanks,
 

Discussion

Engineering news on Phys.org
Your question is more chemistry rather than EE. So before answering, please tell us a bit about your level of chemistry knowledge.

If a chemical reaction is reversible, what drives it to go one direction or the other?
 
anorlunda said:
Your question is more chemistry rather than EE. So before answering, please tell us a bit about your level of chemistry knowledge.

If a chemical reaction is reversible, what drives it to go one direction or the other
In the case of oxidation reaction that needs to occur in a vanadium redox flow battery,
VO2++H2O -- VO2+ +e- +2H+
This reaction requires an input of energy in order to allow this reaction to occur, as VO2 + has a higher chemical energy than VO2+ I want to know the energy supplied by charging electrons is exchanged to the chemicals.