Figure 2

TGA and DTG curves of (A) PVP, (B) NaCo2O4 precursor, and (C) stabilized PAN. (D) Heat-treatment for calcination and carbonization.
TGA and DTG curves of (A) PVP, (B) NaCo2O4 precursor, and (C) stabilized PAN. (D) Heat-treatment for calcination and carbonization.