Department of Materials Science and Engineering Korea University Anam‑Dong Seongbuk‑Gu Seoul 136‑713 Republic of Korea;
Department of Chemical Engineering Kongju National University 1223‑24 Cheonan‑daero Seobuk‑gu Cheonan 31080 Republic of Korea;
Department of Materials Science and Engineering Korea University Anam‑Dong Seongbuk‑Gu Seoul 136‑713 Republic of Korea;
Metal-organic frameworks; Hollow mesoporous carbon nanospheres; Potassium-ion batteries; Cobalt selenides; Electrode materials;