期刊
ELECTROCHIMICA ACTA
卷 320, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.134641
关键词
Supercapacitors; Conducting polymers; 5-Fluoroindole; Electrochemical polymerization
资金
- National Natural Science Foundation of China [51862011, 51662012, 51863009, 51572117, 51762020]
- Jiangxi Outstanding Young Talent Fund Projects [20171BCB23076]
- Natural Science Foundation of Jiangxi Province [20171BAB206013, 20171ACB20026]
- Innovation Driven 5511 Project of Jiangxi Province [20165BCB18016]
- Scientific Research Projects of Jiangxi Science and Technology Normal University [2016QNBJRC001, 2015CXTD001]
- Jiangxi Science & Technology Normal University Innovation Fund of Postgraduates [YC2018-X41]
Fluoropolymers have great values in the scientific research and the industrial application, but poor electrochemical properties restricted their use as charge storage materials. In this work, we developed a high-performance poly(5-fluoroindole) (5-PFIn) as charge storage material by simple electrodeposition of 5-fluoroindole in acetonitrile solution containing 0.1 M Bu4NBF4. The morphologies, structures and electrochemical properties of as-prepared 5-PFIn were studied by SEM, FT-IR, UV-vis, BET and electrochemical techniques, respectively. The electrochemical results indicated that the 5-PFIn nanowires in 1.0 M H2SO4 electrolyte showed a full-covered strongly responsive redox behavior between -0.4 V and 0.85 V, which remarkably differed from polyindole (PIn) and poly(5-methoxyindole) (5-PMeOIn) and poly(indole-5-carboxylic acid) (5-PICA). As a result, 5-PFIn exhibited high specific capacitance of 416 F g(-1) at 10 A g(-1), good cycling stability of 83% after 5000 cycles and slow self-discharge behavior, which were superior to those of PIn (103 F g(-1), 68%), 5-PMeOIn (114 F g(-1), 70%) and 5-PICA (286 F g(-1), 70%). These results indicated that the fluorine-substituted conjugated PIn will be one of the most promising fluoropolymers electrode materials for supercapacitor application. (C) 2019 Elsevier Ltd. All rights reserved.
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