Electrochemical Performance of MnO2 Composite with Activated Carbon for Supercapacitor Applications: ELECTROCHEMICAL PERFORMANCE OF MNO2 COMPOSITE . Indian Journal of Engineering and Materials Sciences (IJEMS), [S. l.], v. 30, n. 3, p. 424–430, 2023. DOI: 10.56042/ijems.v30i3.3681. Disponível em: https://or.niscpr.res.in/index.php/IJEMS/article/view/3681. Acesso em: 14 may. 2026.