Highly efficient electrochemical energy storage of fluorinated nano-polyindoles with different morphology

The introduction of fluorine into a compound or material is known to impart a range of interesting functionalities; however, the poor electrochemical capacity of existing fluorinated polymers limits their application in the field of energy storage. Thus, we herein report the successful preparation o...

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Bibliographic Details
Published in:Electrochimica acta 2020-07, Vol.349, p.136410, Article 136410
Main Authors: Wang, Rui, Zhou, Weiqiang, Lin, Kaiwen, Jiang, Fengxing, Wang, Zhenfeng, Xu, Jingkun, Zhang, Yingying, Liang, Aiqin, Nie, Guangming, Duan, Xuemin
Format: Article
Language:English
Subjects:
Electrode materials
Energy storage
Fluorinated polyindole
Fluorine
Fluoropolymers
Image transmission
Morphology
Nanofibers
Nanorods
Nanostructure
Nanowires
Polymerization
Supercapacitor
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Summary:The introduction of fluorine into a compound or material is known to impart a range of interesting functionalities; however, the poor electrochemical capacity of existing fluorinated polymers limits their application in the field of energy storage. Thus, we herein report the successful preparation of several fluorinated polyindole materials exhibiting high energy storage behaviours using a simple electropolymerization strategy. Scanning and transmission electron microscopic images reveal that the monofluorinated polyindoles are mainly composed of one-dimensional (1D) nanofibers and nanorods, whereas 1D nanowires and two-dimensional (2D) nanosheets are obtained for the difluorinated polyindoles. Interestingly, the prepared fluorinated polyindoles are found to exhibit the highest specific capacitances among all reported fluorinated materials (i.e., 261–528 F g−1 at 18 A g−1). In addition, they exhibit a good cycle stability as well as a high rate capability. Our results indicate that fluorinated nano-polyindoles can be considered as promising electrode materials for energy storage applications.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2020.136410