Biotemplate synthesis of polypyrrole@bacterial cellulose/MXene nanocomposites with synergistically enhanced electrochemi
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ORIGINAL RESEARCH
Biotemplate synthesis of polypyrrole@bacterial cellulose/ MXene nanocomposites with synergistically enhanced electrochemical performance Quancheng Song . Zeying Zhan . Binxia Chen . Zehang Zhou . Canhui Lu
Received: 22 April 2020 / Accepted: 24 June 2020 Ó Springer Nature B.V. 2020
Abstract Polypyrrole (PPy) has received extensive attention in supercapacitor electrodes due to its promising electrochemical activity, while the poor cycling stability and densely packed structure limited its electrochemical performance. Herein, we demonstrate the fabrication of flexible and freestanding PPy@bacterial cellulose (BC)/MXene composite film with significantly enhanced electrochemical performance. PPy nanoparticles were uniformly deposited on BC nanofibers via in situ polymerization, and assembled with highly conductive MXene (Ti3C2Tx) nanoflakes through strong interfacial interactions. BC as a biological template can effectively disperse PPy nanoparticles. The intercalation of PPy@BC nanofibers into Ti3C2Tx layers constructs hierarchically packed nanofibrous structure, which provides
extensive accessible electrochemical active sites. Freestanding PPy@BC/Ti3C2Tx (PBM) electrode exhibits superior specific capacitance (gravimetric and areal capacitance of up to 550 F g-1 and 879 mF cm-2, respectively) and excellent capacitance retention of 83.5% after 10,000 cycles. In addition, the symmetric supercapacitor assembled by PBM papers present a high energy density of 33.1 W h kg-1 (power density of 243 W kg-1) and excellent capacitance retention. The elaborately designed nanostructure and PPy-Ti3C2Tx hybridization make great contribution to the enhanced electrochemical performance, which provide a feasible method for the fabrication of conductive polymerbased high-performance flexible supercapacitor electrodes.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03310-7) contains supplementary material, which is available to authorized users. Q. Song Z. Zhan B. Chen Z. Zhou (&) C. Lu (&) State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, People’s Republic of China e-mail: [email protected] C. Lu e-mail: [email protected]
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Cellulose
Graphic abstract
Keywords Mxene Bacterial cellulose Polypyrrole Supercapacitor
Introduction Rapid widespread of portable electronic devices requires the development of flexible energy storage systems (Simon and Gogotsi 2008). Supercapacitors (SCs) have been widely explored for energy storage application owing to their higher power density, cycle efficiency and rapid charge–discharge rates (Zhang and Zhao 2009; Choi et al. 2012; El-Kady et al. 2016). To date, pseudocapacitive materials such as metal oxides/hydroxides (e.g., RuO2 (Jiang et al. 2018), MnO2 (Zhu et al. 2018) and Ni(OH)2 (Ke et al. 2017)) or conductive polymers (e.g., polypyrrole (PPy) (Song et al. 2015; Kashani et al. 2016) an
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