Flexible freestanding conductive nanopaper based on PPy:PSS nanocellulose composite for supercapacitors with high performance
نویسندگان
چکیده
A freestanding, binder-free flexible polypyrrole: polystyrene sulfonate/cellulose nanopaper (PPy:PSS/CNP) electrode is successfully fabricated by a low-cost, simple, and fast vacuum filtration method for the first time. The hierarchical structure of CNP with high surface area good mechanical strength not only provides electroactive region shortens diffusion distance electrolyte ions, but also mitigates volumetric expansion/shrinkage PPy during charging/discharging process. optimized PPy:PSS/CNP exhibits areal specific capacitance 3.8 F cm?2 (corresponding to 475 cm?3 240 g?1) at 10 mV s?1 cycling stability (80.9% retention after 5000 cycles). cyclic voltammetry curves different bending angles indicate prominent flexibility electrochemical electrode. Moreover, symmetric supercapacitor device assembled delivers energy density 122 µ (15 W h cm?3) power 4.4 mW (550 cm?3), which superior other cellulose-based materials. combination supercapacitive performance, flexibility, easy fabrication, cheapness PPy: PSS/CNP electrodes offers great potential developing next generation green economical portable wearable consumer electronics.
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ژورنال
عنوان ژورنال: Science China. Materials
سال: 2022
ISSN: ['2095-8226', '2199-4501']
DOI: https://doi.org/10.1007/s40843-022-2225-x