期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 5, 页码 1838-1847出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta10096h
关键词
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资金
- Power Papers project from the Knut and Alice Wallenberg foundation
- Wallenberg Scholar grant from the Knut and Alice Wallenberg foundation
- Marie Curie network Renaissance (NA)
- European Research Council by Starting Grant Innovative Polymers for Energy Storage (iPes) [306250]
- Basque Government
- European Research Council (ERC) [306250] Funding Source: European Research Council (ERC)
Developing sustainable organic electrode materials for energy storage applications is an urgent task. We present a promising candidate based on the use of lignin, the second most abundant biopolymer in nature. This polymer is combined with a conducting polymer, where lignin as a polyanion can behave both as a dopant and surfactant. The synthesis of PEDOT/Lig biocomposites by both oxidative chemical and electrochemical polymerization of EDOT in the presence of lignin sulfonate is presented. The characterization of PEDOT/Lig was performed by UV-Vis-NIR spectroscopy, FTIR infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, cyclic voltammetry and galvanostatic charge-discharge. PEDOT doped with lignin doubles the specific capacitance (170.4 F g(-1)) compared to reference PEDOT electrodes (80.4 F g(-1)). The enhanced energy storage performance is a consequence of the additional pseudocapacitance generated by the quinone moieties in lignin, which give rise to faradaic reactions. Furthermore PEDOT/Lig is a highly stable biocomposite, retaining about 83% of its electroactivity after 1000 charge/discharge cycles. These results illustrate that the redox doping strategy is a facile and straightforward approach to improve the electroactive performance of PEDOT.
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