Method for making polymer, coating electrode, and associated polymer and electrode

1. A method for coating an electrode comprising:

providing an electrode;

providing a solution of a free radical initiator, a monomer comprising at least two amide groups, a monomer of formula (a)

and a sulfonic acid or salt monomer;

wetting the electrode with the solution; and

heating the wetted electrode;

whereby the monomer comprising at least two amide groups, the monomer of formula (a), and the sulfonic acid or salt monomer are copolymerized;

wherein

R 1 is CH 3 or H.

2. The method of claim 1 , wherein the sulfonic acid or salt monomer is of formula (b):

wherein R is CH 3 or H; X is NH or O and Y is alkyl.

3. The method of claim 2 , wherein the sulfonic acid or salt monomer is 2-acrylamido-2-methylpropane sulfonic acid.

4. The method of claim 1 , wherein the sulfonic acid or salt monomer is p-styrene sulfonic acid.

5. The method of claim 1 , wherein the monomer of formula (a) is N-(hydroxymethyl)acrylamide.

6. The method of claim 1 , wherein the free radical initiator is 2,2′-(azobis(2-methylpropionamidine)dihydrocloride, ammonium persulphate, or potassium persulphate.

7. The method of claim 1 , wherein the monomer comprising at least two amide groups is carbonyldiamine.

8. An electrode coated by the method of claim 1 .