Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene Nanocomposites
One-pot synthesis of mixed-valence manganese oxide (MnO<sub>x</sub>)/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 MnO<sub>x</su...
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MDPI AG
2019-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/12/8/1245 |
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doaj-521e77cab2534a14acb9b3cad849be422020-11-25T00:49:18ZengMDPI AGMaterials1996-19442019-04-01128124510.3390/ma12081245ma12081245Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene NanocompositesWooree Jang0Dae-Young Jeon1Youn-Sik Lee2Hye Young Koo3Functional Composite Materials Research Center, Korea Institute of Science and Technology (KIST) Jeonbuk Institute of Advanced Composite Materials, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, KoreaFunctional Composite Materials Research Center, Korea Institute of Science and Technology (KIST) Jeonbuk Institute of Advanced Composite Materials, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, KoreaSchool of Chemical Engineering, Chonbuk National University, Jeon-ju, Jeollabuk-do 54896, KoreaFunctional Composite Materials Research Center, Korea Institute of Science and Technology (KIST) Jeonbuk Institute of Advanced Composite Materials, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, KoreaOne-pot synthesis of mixed-valence manganese oxide (MnO<sub>x</sub>)/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 MnO<sub>x</sub> and by directly annealing the rGO without tedious purification steps, as described herein, MnO<sub>x</sub>/rGO composites with a high specific capacitance of 1955.6 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup> are achieved. It is found that the presence of potassium ions helps in the development of mixed-valence MnO<sub>x</sub> on the surface of the rGO.https://www.mdpi.com/1996-1944/12/8/1245manganese oxidereduced graphene oxidenanocompositegraphene |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Wooree Jang Dae-Young Jeon Youn-Sik Lee Hye Young Koo |
| spellingShingle |
Wooree Jang Dae-Young Jeon Youn-Sik Lee Hye Young Koo Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene Nanocomposites Materials manganese oxide reduced graphene oxide nanocomposite graphene |
| author_facet |
Wooree Jang Dae-Young Jeon Youn-Sik Lee Hye Young Koo |
| author_sort |
Wooree Jang |
| title |
Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene Nanocomposites |
| title_short |
Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene Nanocomposites |
| title_full |
Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene Nanocomposites |
| title_fullStr |
Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene Nanocomposites |
| title_full_unstemmed |
Effect of Potassium Ions on the Formation of Mixed-Valence Manganese Oxide/Graphene Nanocomposites |
| title_sort |
effect of potassium ions on the formation of mixed-valence manganese oxide/graphene nanocomposites |
| publisher |
MDPI AG |
| series |
Materials |
| issn |
1996-1944 |
| publishDate |
2019-04-01 |
| description |
One-pot synthesis of mixed-valence manganese oxide (MnO<sub>x</sub>)/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 MnO<sub>x</sub> and by directly annealing the rGO without tedious purification steps, as described herein, MnO<sub>x</sub>/rGO composites with a high specific capacitance of 1955.6 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup> are achieved. It is found that the presence of potassium ions helps in the development of mixed-valence MnO<sub>x</sub> on the surface of the rGO. |
| topic |
manganese oxide reduced graphene oxide nanocomposite graphene |
| url |
https://www.mdpi.com/1996-1944/12/8/1245 |
| work_keys_str_mv |
AT wooreejang effectofpotassiumionsontheformationofmixedvalencemanganeseoxidegraphenenanocomposites AT daeyoungjeon effectofpotassiumionsontheformationofmixedvalencemanganeseoxidegraphenenanocomposites AT younsiklee effectofpotassiumionsontheformationofmixedvalencemanganeseoxidegraphenenanocomposites AT hyeyoungkoo effectofpotassiumionsontheformationofmixedvalencemanganeseoxidegraphenenanocomposites |
| _version_ |
1725251797811986432 |