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240523s2024 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.4c00316
|2 doi
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|a eng
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| 100 |
1 |
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|a Ye, Shuyan
|e verfasserin
|4 aut
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| 245 |
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|a Oxidative MnO2 Template Assisted Electrochemical Fabrication of Graphene/Polypyrrole Supercapacitor Electrodes
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|c 2024
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|a Text
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|a ƒaComputermedien
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|a Date Revised 04.06.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Improving the morphological structure of active materials is a reliable strategy for the fabrication of high-performance supercapacitor electrodes. In this study, we introduce a feasible approach to constructing the graphene/polypyrrole (PPy) composite film implanted onto the current collector through a two-step electrochemical deposition method utilizing MnO2 as an intermediary template. The reduced graphene oxide (rGO) hydrogel film is first hydrothermally grown on a carbon cloth (CC) substrate to obtain a porous rGOCC electrode on which MnO2 is electrodeposited. Then the as-prepared rGO/MnO2@CC electrode is subjected to the electrochemical polymerization of pyrrole, with MnO2 acting as an oxidizing template to facilitate the oxidative polymerization of pyrrole, ultimately yielding an rGO/PPy composite film on CC. The PPy synthesized via this methodology exhibits a distinctive interconnected structure, resulting in superior electrochemical performance compared with the electrode with PPy directly electrodeposited on rGO@CC. The optimized electrode achieves an impressive specific capacitance of 583.6 F g-1 at 1 A g-1 and retains 83% of its capacitance at 20 A g-1, with a capacitance loss of only 9.5% after 5000 charge-discharge cycles. The corresponding all-solid-state supercapacitor could provide a high energy density of 22.5 Wh kg-1 and a power density of 4.6 kW kg-1, with a capacitance retention of 82.7% after 5000 charge-discharge cycles. Furthermore, the device also demonstrates good flexibility performance upon bending at 90 and 180°. This work presents an innovative method for the preparation of carbon material/conducting polymer electrodes with specific structural characteristics and superior performance
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|a Journal Article
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1 |
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|a Xu, Aizhen
|e verfasserin
|4 aut
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| 700 |
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|a Cao, Weifeng
|e verfasserin
|4 aut
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| 700 |
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|a Zhao, Zhiyi
|e verfasserin
|4 aut
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| 700 |
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|a Zhang, Shaoqing
|e verfasserin
|4 aut
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| 700 |
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|a Qin, Yujun
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 40(2024), 22 vom: 04. Juni, Seite 11460-11469
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
1 |
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|g volume:40
|g year:2024
|g number:22
|g day:04
|g month:06
|g pages:11460-11469
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|u http://dx.doi.org/10.1021/acs.langmuir.4c00316
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