Jang, Wooree Jeon, Dae-Young Lee, Youn-Sik Koo, Hye Young 2024-01-19T20:04:56Z 2024-01-19T20:04:56Z 2021-09-02 2019-04-02 1996-1944 https://pubs.kist.re.kr/handle/201004/120113 One-pot synthesis of mixed-valence manganese oxide (MnOx)/potassium ion-doped reduced graphene oxide (rGO) composites for efficient electrochemical supercapacitors is introduced. Using manganese nitrate and potassium permanganate as co-precursors for the MnOx and by directly annealing the rGO without tedious purification steps, as described herein, MnOx/rGO composites with a high specific capacitance of 1955.6 F g(-1) at a current density of 1 A g(-1) are achieved. It is found that the presence of potassium ions helps in the development of mixed-valence MnOx on the surface of the rGO. English MDPI HIGH-PERFORMANCE GRAPHENE OXIDE COMPOSITE ELECTRODE SUPERCAPACITORS NANORODS DIOXIDE FACILE Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene Nanocomposites Article 10.3390/ma12081245 1 MATERIALS, v.12, no.8 MATERIALS 12 8 scie scopus 000467767400051 2-s2.0-85065645312 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physics, Applied Physics, Condensed Matter Chemistry Materials Science Metallurgy & Metallurgical Engineering Physics Article HIGH-PERFORMANCE GRAPHENE OXIDE COMPOSITE ELECTRODE SUPERCAPACITORS NANORODS DIOXIDE FACILE manganese oxide reduced graphene oxide nanocomposite graphene