Synthesis of Co3O4/NiO nanospherical composites as electrode material for high-performance supercapacitorsMohammad Shariq, Amal BaQais, Talal M. Althagafi, Osama Madkhali, Arafa A. Alholaisi, Sajad Hussain and Yasir JavedEur. Phys. J. Plus, 138 5 (2023) 389DOI: https://doi.org/10.1140/epjp/s13360-023-04001-5