I have tried graphite from pens but these tend to break up in chunks after a while, whether I do electrolysis in water or electrolysis of a salt.
Why does the graphite break up?
Unfortunately, I can't remelt the graphite and cast it.
I have tried silicon, but to my surprise, it breaks up into chuncks as well. Also, it is not as good a conductor as graphite.
I found these small graphite pieces that are rod shaped. They seem to last longer than graphite from pens and the diameter is higher but again, no good.
So what is the deal? Why does graphite break up?
Should I try graphite rods from C or D cell ordinary zinc batteries?