期刊
ELECTROCHIMICA ACTA
卷 282, 期 -, 页码 286-294出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.06.006
关键词
Polyaniline; Two-step method; Freezing; Bimodal nanostructures; Supercapacitors
资金
- National Natural Science Foundation of China [51472172]
Here we report a novel and simple two-step method to fabricate polyaniline, which consists of two successive low-temperature (-20 degrees C, frozen) and near-room temperature (30 degrees C) periods. Melting of the frozen part and solute migration mainly drives polymerization. It is proved that the two-step method is an efficient way to fabricate polyaniline with a bimodal morphology composed of coral-like structure with thorns and interconnected nanowire structure. The mechanism of formation of such bimodal morphology is discussed in detail. Optimized polyaniline prepared by this method showed an excellent electrochemical energy storage performance, with a specific capacitance of 689 F g(-1) at 1 A g(-1) and a good retention rate of 89% (613 F g(-1)) at 10 Ag-1. Symmetric cells based on it show an energy density of 12.6 Wh kg(-1) at a power density of 188.3 W kg(-1). In summary, this work provides a new way to fabricate polyaniline for supercapacitor applications. (C) 2018 Elsevier Ltd. All rights reserved.
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