Modification of Nafion Membranes by IL-Cation Exchange: Chemical Surface, Electrical and Interfacial Study

Table 1

Atomic concentration percentages of the characteristic elements found on the membranes surfaces.

Sample	C%	O%	F%	S%	N%
Nafion (theoretical)	30.8	7.7	60.0	1.5	—
Naf-112	39.0	6.6	53.4	1.0	0.2
Naf-117	41.4	6.4	50.5	0.9	0.4
Naf-112/DTA^+	54.5	11.5	27.2	1.1	2.8
Naf-117/DTA^+	49.5	9.8	36.2	1.1	1.5