Sciencemadness Discussion Board
Not logged in [Login - Register]
Go To Bottom

Printable Version  
Author: Subject: Few questions on dual carbon batteries
John paul III
Hazard to Self
**




Posts: 69
Registered: 28-4-2018
Member Is Offline

Mood: No Mood

[*] posted on 5-1-2019 at 07:16
Few questions on dual carbon batteries


Dual carbon batteries use graphite formed by pyrolysis of cotton as both cathode and anode. The alkali salt, in the original battery LiPF6 undergoes following reactions:

Positive electrode:

PF−6 + n C ⇄ Cn(PF6) + e−
Negative electrode:

Li+ + n C + e− ⇄ LiCn

this is interesting to me because Im into low tech chemistry and this seems like the simplest in terms of obtaining chemical components battery out there. If we can replace LiPF6 with a potassium compound that is.

Therefore: Could a potassium salt by used since it also forms an intercalation compound with graphite (KC8)? Or does KC8 have properties that would preclude it's use, such that it would for example destroy the fine structure of the electrode?

Why is PF6 used as the anion? It forms an intercalation compound as well which makes the battery rechargeable, but if we're fine with it being a disposable battery, could we use a carbonate anion that would form co2 at the electrode,or would it potentially oxidize the electrode forming carbon monoxide?


[Edited on 5-1-2019 by John paul III]
View user's profile View All Posts By User
Dan Vizine
International Hazard
*****




Posts: 615
Registered: 4-4-2014
Location: Tonawanda, New York
Member Is Offline

Mood: High Resistance

[*] posted on 6-1-2019 at 16:14


The large size of potassium would make the graphite cathode tend to crumble and disintegrate even faster than lithium does.




"All Your Children Are Poor Unfortunate Victims of Lies You Believe, a Plague Upon Your Ignorance that Keeps the Youth from the Truth They Deserve"...F. Zappa
View user's profile View All Posts By User

  Go To Top