I my case, I usually prepare an ink of the powder and a solvent (like water or alcohol) and Nafion 5% solution. then I mix them through ultrasonic bath for 10 minutes. then, I drop this ink on glassy carbon rod or any other type of conductive support as working electrode.

you can blend this material with a carbon paste.for example, you have a metal of A.

carbon paste:30% paraffin+70% graphite

preparation of 10% electrode from metal of A: 10% A(powder) +60% graphite+30% paraffin

you must blend A & graphite first for hemogen by MORTAR

after blending you should use teflon electrode.

Regards,

abolfazl

Hi,

because of the high pH-Value I would suggest a water filter candle made from PTFE/FEP/PFA, according your metal powder particles diameter you can choose the permeability, see:

http://www.apic-filter.de/index.aspx?MainMenu=Mikrofiltration

Good Luck!

Karl

Talking about electrode to use in alkaline electrolyte solution, you need to find an appropriate binder which is not soluble in your electrolyte (Polyvinyl alcohol (PVA_ usually works in alkaline solution). In most of cases, the metal powder itself has a low conductivity. Therefore it is necessary to mix the powder with a conductive agent such as carbon graphite (80:20 or 90:10). Mix up your metal powder with your conductive agent and the binder to get a good paste that you will load it on the surface of a substrate (glassy or metallic). Dry out your paste for few hours. Connect the substrate to the current collector. You are done.

See how the negative electrode was prepared from metal hydride (MH) alloy in publications in the Journal of Power Sources 195 (2010) 7669-7676. ibid 225 (2013)215 - 220.

Go search for other publications related to battery electrodes.

I could not understand what kind of powder u are talking. but if the particle size is very small (nano size) and u want to study the electrochemical behavior then generally u can make a film of particles over electrode by any method using a proper binder.

You can make an electrode with metal powder using polymer binder and conductive additives. An electrode is formed as follows.

Fist, a slurry is prepared by mixing metal powders, about 5 wt% conductive additive ( acetylene black) , about 10 wt% polymer binder solution ( CMC /aqueous solution, polyamide-imide /NMP solution).

Second, above prepared slurry is coated on a metal substrate (Ni or Cu) and dried at 150-200 °C.

And then you get the electrode with metal powder.

I my case, I usually prepare an ink of the powder and a solvent (like water or alcohol) and Nafion 5% solution. then I mix them through ultrasonic bath for 10 minutes. then, I drop this ink on glassy carbon rod or any other type of conductive support as working electrode.

Dear all,

Dear Ali Seifitokaldani,

Do you think the concentration of Nafion (5%) that you used is not slightly high??

For example, if I use such a concentration for preparing an ink of activated carbon to be loaded onto a working electrode (glassy carbon), and then this modified electrode is sued for doing an electrochemical study (cyclic voltammetry, for instance). Do you think the modified electrode will work 100%efficiently? i.e., the 5% Nafion will not make some insulation which decreases the efficiency of the modified working electrode??

Finally and to summarize, what is the optimum concentration of Nafion (PTFE) to be used as a binder of preparing an ink to modify a glassy carbon electrode using activated carbon??

Thanks in advance for all of you.

Saddam