Table 2.
Surface element contents from SEM-EDS analysis of LBPC, KA-LBPC-6, 7, 8 and 9

Element	Atom (%)
	LBPC	KA-LBPC-6	KA-LBPC-7	KA-LBPC-8	KA-LBPC-9
Carbon	99.84	92.32	95.35	96.49	95.15
Oxygen	-	5.39	4.29	2.94	3.95
Potassium	-	1.98	0.15	0.28	0.57
Copper	0.13	0.14	0.14	0.17	0.21
Zinc	-	0.17	0.07	0.12	0.12
Calcium	0.03	-	-	-	-
Total	100.00	100.00	100.00	100.00	100.00
LBPC: non-activated and carbonized Lignin-PAN copolymerKA-LBPC-x: KOH activated and carbonized Lignin-PAN copolymer