An In Situ Oxidative Polymerization Method to Synthesize Mesoporous Polypyrrole/MnO<sub>2</sub> Composites for Supercapacitors
Manganese dioxide (MnO<sub>2</sub>) shows great potential in the field of electrochemical performance. But its poor conductivity, easy dissolution in electrolytes and undesirable ionic accessibility hinder its application. The construction of mesoporous polypyrrole/manganese dioxide (PPy...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/1/45 |
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| Summary: | Manganese dioxide (MnO<sub>2</sub>) shows great potential in the field of electrochemical performance. But its poor conductivity, easy dissolution in electrolytes and undesirable ionic accessibility hinder its application. The construction of mesoporous polypyrrole/manganese dioxide (PPy/MnO<sub>2</sub>) composites can effectively alleviate these problems. Herein, an in situ oxidative polymerization method is developed to synthesize mesoporous PPy/MnO<sub>2</sub> composites. In this method, Pluronic P123 and pyrrole monomers are co-assembled on the surface of MnO<sub>2</sub>. MnO<sub>2</sub> is used as an oxidation initiator to polymerize pyrrole under acidic conditions and as a substrate for a uniform coating of PPy. The obtained composites, with a large electrochemical effective area, more reaction sites and good structural stability have better capacitor performance (182.8 F g<sup>−1</sup>), higher than MnO<sub>2</sub> (116.6 F g<sup>−1</sup>) at the same current density. This method provides a meaningful reference for the development of mesoporous PPy/MnO<sub>2</sub> supercapacitor materials. |
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| ISSN: | 1420-3049 |