期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 611, 期 -, 页码 356-365出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.12.090
关键词
Polypyrrole; Phytic acid; Defects and oxygen-containing groups; Synergistic effects; Supercapacitor
资金
- Program for the National Natural Science Foundation of China [51879101, 51779090, 51709101, 51521006, 51809090, 51809293]
- National Program for Support of Top-Notch Young Professionals of China (2014)
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
- Hunan Provincial Science and Technology Plan Project [2018SK20410]
- Science and Technology Innovation Program of Hunan Province [2020RC4014]
Unevenly distributed polypyrrole films/coatings with extensive dead volumes via electrodeposition pose a challenge for high energy density flexible supercapacitors. In this study, a phytic acid-guided graphite carbon felt/polypyrrole 3D porous composite was fabricated with less dead volumes, leading to a higher areal energy density. The activation of phytic acid on the surface of carbon felt increased defects and oxygen-containing groups, which synergistically promoted the formation of perfect PPy films with less dead volume.
Unevenly distributed polypyrrole (PPy) films/coatings with extensive dead volumes via electrodeposi-tion have emerged as a main challenge for high energy density flexible supercapacitor. In this work, we have fabricated a phytic acid-guided graphite carbon felt/polypyrrole (GF@PA@PPy) 3D porous composite with less dead volumes via electrodeposition. After the activation of phytic acid (PA), the quantity and content of defects and oxygen-containing groups on the surface of carbon felt (GF) have increased. First, these functional groups improve the hydrophilicity of the surface of GF, resulting in the preferential uni-form distribution of pyrrole monomer (Py). While significantly, the synergistic effects between the defects and oxygen-containing groups boost the attraction of pyrrole ring, and thus promotes the forma-tion of perfect PPy films with less dead volume on GF. Finally, the supercapacitor assembled from the GF@PA@PPy-40 displays a high areal energy density of 0.0732 mWh cm(-2), exceeding the previously reported PPy-based electrodes values. The deeper understanding of the role for the defects and oxygen-containing groups in the synthesis of PPy/carbon materials offers a new strategy to construct advanced PPy-based supercapacitors. (C) 2021 Published by Elsevier Inc.
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