دانلود رایگان مقاله غشا مرکب نانوفیبر سلولز سولفید پلی پیرول - مسی - باکتریایی

Abstract

Polypyrrole (PPy) and copper sulfide (CuS) have been successfully deposited on bacterial cellulose (BC) membranes to prepare nanofibrous composite electrodes of PPy/CuS/BC for flexible supercapacitor applications. The introduction of CuS remarkably improves the specific capacitance and cycling stability of BC-based electrodes. The specific capacitance of the supercapacitors based on the PPy/CuS/BC electrodes can reach to about 580 F g−1 at a current density of 0.8 mA cm−2 and can retain about 73% of their initial value after 300 cycles, while the PPy/BC-based device could retain only 21.7% after 300 cycles. This work provides a promising approach to fabricate cost-effective and flexible nanofibrous composite membranes for high-performance supercapacitor electrodes.

4. Conclusions

PPy/CuS/BC nanofibrous composite membranes have been successfully prepared in this work. The obtained PPy/CuS/BC membranes are highly conductive to be directly used as flexible supercapacitor electrodes. Electrochemical tests demonstrate that the introduction of CuS could improve the capacitive performances. The supercapacitors based on the PPy/CuS/BC electrodes can achieve a relatively high specific capacitance of about 580 F g−1 at a current density of 0.8 mAcm−2 and can retain 73% of their initial capacitance after 300 cycles. This study shows a promising potential to fabricate flexible, cost-effective and high-performance nanofibrous composite membranes for supercapacitor applications.