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Fabrication of flexible polyindole/carbon nanotube/bacterial cellulose nanofiber nonwoven electrode doped by D -tartaric acid with high electrochemical performance
Cellulose ( IF 5.7 ) Pub Date : 2020-05-14 , DOI: 10.1007/s10570-020-03199-2
Wu Jiajia , Du Zhanwen , Xiong Ping , Cai Zhijiang

The flexible polyindole/carbon nanotube/bacterial cellulose (PIn/CNT/BC) nanofiber nonwoven electrode is prepared by a two-step method combination of ‘electrospinning and electrospray’ process and potentiostatic polymerization. The structure and morphology of the as-prepared PIn/CNT/BC nonwoven electrode are investigated by Scanning electron microscopy, Transmission electron microscopy, Fourier transform infrared, Brunauer–Emmett–Teller and Energy dispersive spectroscopy. The PIn/CNT/BC electrode has a hierarchy configuration with a broccoli-like rough surface consisting of BC electrospun nanofibers, CNT coating layer and PIn nanoparticle layer, which play the function of supporting substrate, conductive path and electrode active material, respectively. To evaluate the electrochemical properties of PIn/CNT/BC electrode, cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy tests are performed. The unique structure ensures that the flexible PIn/CNT/BC nanofiber nonwoven electrode exhibits larger specific capacitance up to 552.6 F g−1, longer operation life with 95.6% capacitance retention after 5000 cycles, better conductivity with a fitting value of charge-transfer resistance of 9.87 Ω, outstanding flexibility and stability with specific capacitance retention over 96.4% after 1500 bending cycles. The remarkable electrochemical performance of PIn/CNT/BC nanofiber nonwoven electrode offer promising applications as flexible energy storage device for wearable and smart electronic components.



中文翻译:

高电化学性能D-酒石酸掺杂的柔性聚吲哚/碳纳米管/细菌纤维素纳米纤维非织造电极的制备

柔性聚吲哚/碳纳米管/细菌纤维素(PIn / CNT / BC)纳米纤维非织造电极是通过“静电纺丝和电喷雾”工艺与恒电位聚合相结合的两步法制备的。通过扫描电子显微镜,透射电子显微镜,傅立叶红外光谱仪,Brunauer-Emmett-Teller和能量色散光谱法研究了所制备的PIn / CNT / BC无纺布电极的结构和形态。PIn / CNT / BC电极具有层次结构,其花椰菜状的粗糙表面由BC电纺纳米纤维,CNT涂层和PIn纳米颗粒层组成,分别起到支撑基底,导电路径和电极活性材料的作用。为了评估PIn / CNT / BC电极的电化学性能,循环伏安法,进行恒电流充电/放电和电化学阻抗谱测试。独特的结构可确保柔性PIn / CNT / BC纳米纤维非织造电极表现出更大的比电容,最高可达552.6 F g-1,具有更长的使用寿命,在5000次循环后具有95.6%的电容保持力;导电性更好,电荷转移电阻的合适值为9.87Ω;出色的柔韧性和稳定性,在1500个弯曲循环后的比电容保持率超过96.4%。PIn / CNT / BC纳米纤维非织造布电极的卓越电化学性能为可穿戴和智能电子组件的柔性储能设备提供了有希望的应用。

更新日期:2020-05-14
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