製備了由纖維素奈米纖維、酸處理的碳微線圈（CMC）、聚吡咯和碳量子點組成的複合膜。 通過掃描電子顯微鏡氮吸附-解吸等溫線、紅外吸收光譜和拉曼光譜驗證組分材料的累積/沉積和膜的表面性質。
在1M NaCl水溶液中，該膜作為電解質在三電極系統中用作工作電極。 循環伏安法（CV）顯示，CMC / TOCNF比電容約為85 F / g，隨聚吡咯和碳點的添加而增加，在5mV / s的掃描速率下最大達到854 F / g。 另外，該複合膜電極在3000次循環後的電容保持率為91.1％，該膜在彎曲50次後的穩定性為82.1％。 這些結果表明所製備的柔性超級電容器電極品質是能受到彎曲後能有好的電容率。

The composite films consisting of cellulose nanofiber, acid-treated carbon microcoil (CMC), polypyrrole and carbon dots were prepared. The accumulation/deposition of component materials and the surface property of the films were confirmed with scanning electron microscopy, nitrogen adsorption-desorption isotherm, infrared adsorption spectroscopy, and Raman spectroscopy.
The films were used as a working electrode in a three-electrodes system in an aqueous 1M NaCl solution as an electrolyte. The cyclic voltammetry (CV) showed that the specific capacitance of CMC/TOCNF about 85 F/g, increased with the addition of polypyrrole, and carbon dots and reached maximum of 854 F/g at the scan rate of 5mV/s. Moreover, the capacitance retention of the relevant composite film electrode was 91.1% after 3000 cycles, and the stability for this film after 50 times bending was 82.1%. These results indicate the enough quality of the prepared flexible supercapacitor electrode

[1] G. Z. Chen, "Understanding supercapacitors based on nano-hybrid materials with interfacial conjugation," Progress in Natural Science: Materials International, pp. 245-255, 2013.
[2] M. S. Whittingham, "History, Evolution, and Future Status of Energy Storage," vol. 100, pp. 1518-1534, 2012.
[3] S. Zhang and N. Pan, "Supercapacitors Performance Evaluation," Advanced Energy Materials, pp. 1-19, 2014.
[4] Q. Ke and W. John, "Graphene-based materials for supercapacitor electrodes - A review," Journal of Materiomics, pp. 37-54, 2016.
[5] S. A. Ebrahima, M. E. H. S. Moataz M and T. Mazhar B, "Preparation and characterization of a pseudo capacitor electrode by spraying a conducting polymer on to a flexible substrate," Journal of Taibah University for Science, pp. 281-285, 2016.
[6] L. J. Rui Xu, W. Jihuai, H. Miaoliang, F. Leqing, X. Zedong and S. Zeyu, "A high-performance pseudocapacitive electrode material for supercapacitors based on the unique NiMoO4/NiO nanoflowers," Applied Surface Science, pp. 721-731, 2019.
[7] A. Q, R. P and F. B´eguin, "Sodium molybdate – an additive of choice for enhancing the performance of AC/AC electrochemical capacitors in a salt aqueous electrolyte," The Royal Society of Chemistry, pp. 199-214, 2014.
[8] M. Aqib Muzaffara, A. Basheer, D. Kalim and T. Jagannathan, "A review on recent advances in hybrid supercapacitors Design, fabrication and applications," Renewable and Sustainable Energy Reviews, pp. 123-145, 2019.
[9] Y. Yoon, L. Keunsik and L. Hyoyoung, "Low-dimensional carbon and MXene-based electrochemical capacitor electrodes," IOP Publishing, pp. 1-4, 2016.
[10] S. Palchoudhury, R. Karthik, R. K. G. and G. Arunava, "Flexible Supercapacitors: A Materials Perspective," Frontiers in Materials |, vol. 5, pp. 1-9, 2019.
[11] A. Isogai, S. Tsuguyuki and F. Hayaka, "TEMPO-oxidized cellulose nanofibers," The Royal Society of Chemistry, vol. 3, pp. 73-81, 2011.
[12] Z. Karim, H. Minna, T. Tekla and M. Aji P, "In situ TEMPO surface functionalization of nanocellulose membranes for enhanced adsorption of metal ions from aqueous medium," The Royal Society of Chemistry, p. 5232–5241, 2017.
[13] T. Wang, Z. Yabo, X. Zheng, T. Guoxia and F. Heliang, "The Specific Capacitive Performances of the Manganese Oxyhydroxide/ Carbon microcoil Electrodes for Supercapacitors," Electrochimica Acta, pp. 134-139, 2015.
[14] I. Shown, I. Toyoko and M. Seiji, "Fabrication of carbon microcoil/polyaniline composite by microemulsion polymerization for electrochemical functional enhancement," Chemical Engineering Journal, pp. 380-384, 2012.
[15] H. Wang, Y. Shaoming and C. Xiuqin, "Progress study of Micro Carbon Coils," IOP Conf. Series: Materials Science and Engineering, vol. 274, pp. 1-6, 2017.
[16] K. Nishikawa, P. Young-Kwang, A. Muhamad, Y. Kazuo and O. Kouhei, "Development of Carbon Microcoils (CMC) Sensor System with High Sensitivity for Effective Acquisition of Tactile Information," IEEE, pp. 1-6, 2005.
[17] M. Hikita, B. Robyn and L. Khalid, "Growth and Properties of Carbon Microcoils and Nanocoils," Crystals, pp. 466-489, 2014.
[18] T. V. Vernitskaya and E. O N, "Polypyrrole: a conducting polymer; its synthesis, properties and applications," Russian Chemical Reviews, vol. 66, pp. 443-457, 1997.
[19] A. Yussuf, A.-S. Mohammad, A.-E. Salah and A. Gils, "Synthesis and Characterization of Conductive Polypyrrole: The Influence of the Oxidants and Monomer on the Electrical, Thermal, and Morphological Properties," International Journal of Polymer Science, pp. 1-8, 2018.
[20] M. Tuerhong, Y. XU and X.-B. YIN, "Review on Carbon Dots and Their Applications," Chinese Journal of Analytical Chemistry, vol. 45, p. 139–150, 2017.
[21] X. Zhang, W. Jingmin, L. Jian, W. Ji, C. Hao and B. Hong, "Design and preparation of a ternary composite of graphene oxide/ carbon dots/polypyrrole for supercapacitor application: Importance and unique role of carbon dots," Carbon, vol. 115, pp. 134-146, 2017.
[22] X. Shia, W. Wei, F. Zhaodi, G. C. Z. Wenli and Z. Qian, "Review on carbon dots in food safety applications," Talanta, vol. 194, pp. 809-821, 2019.
[23] D. Neha, "Study of Hybrid Super-capacitor," International Research Journal of Engineering and Technology (IRJET), vol. 03, no. 02, pp. 1012-1016, 2016.
[24] R. Sujata and K. Chandan, "Study and Analysis of Supercapacitor with its Applications," International Research Journal of Engineering and Technology (IRJET), vol. 02, no. 03, pp. 2194-2196, 2015.
[25] L. Kouchachvili, Y. Wahiba and E. Evgueniy, "Hybrid battery/supercapacitor energy storage system for the electric vehicles," Journal of Power Sources, vol. 374, p. 237–248, 2018.
[26] H. Fathabadi, "Novel fuel cell/battery/supercapacitor hybrid power source for fuel cell hybrid electric vehicles," Energy, vol. 143, pp. 467-477, 2018.
[27] Y. Zheng, Y. Yanbing, C. Shasha and Y. Quan, "Smart, stretchable and wearable supercapacitors: prospects and challenges," The Royal Society of Chemistry 2016, vol. 18, p. 4218–4235, 2016.
[28] M. Beidaghia and G. Yury, "Capacitive energy storage in micro-scale devices: recent advances in design and fabrication of micro-supercapacitors," Energy & Environmental Science, vol. 7, p. 867–884, 2014.
[29] A. Muzaffar, A. M. Basheer, D. Kalim and T. Jagannathan, "A review on recent advances in hybrid supercapacitors: Design, fabrication and applications," Renewable and Sustainable Energy Reviews, vol. 101, pp. 123-145, 2019.
[30] P. D. Adhikari, M. Ujihara, T. Imae, P.-D. Hong and S. Motojima, "Reinforcement on Properties of Poly(vinyl alcohol) Films by Embedding Functionalized Carbon Micro Coils," Journal of Nanoscience and Nanotechnology, vol. 11, p. 1004–1012, 2011.
[31] B. Devadas and T. Imae, "Effect of Carbon Dots on Conducting Polymers for Energy Storage Applications".
[32] D. Bikiaris, A. Vassiliou, K. Chrissafis, K. Paraskevopoulos, A. Jannakoudakis and A. Docoslis, "Effect of acid treated multi-walled carbon nanotubes on the mechanical, permeability, thermal properties and thermo-oxidative stability of isotactic polypropylene," Polymer Degradation and Stability, vol. 93, pp. 952-967, 2008.
[33] P. D. Adhikari, T. Yian, M. Ujihara, C.-C. Chu, T. Imae and S. Motojima, "Surface Functionalization of Carbon Micro Coils and Their Selective Immobilization on Surface-Modified Silicon Substrates," Journal of Nanoscience and Nanotechnology, vol. 10, p. 833–839, 2010.
[34] B. Wu, B. Geng, C. Yufei, L. Hongzhi, L. Guangyao and W. Qiang, "Preparation and characteristics of TEMPO-oxidized cellulose nanofibrils from bamboo pulp and their oxygen-barrier application in PLA films," Front. Chem. Sci. Eng, vol. 11, p. 554–563, 2017.
[35] I. Shown, T. Imae and S. Motojima, "Fabrication of carbon microcoil/polyaniline composite by microemulsion polymerization for electrochemical functional enhancement," Chemical Engineering Journal, vol. 187, p. 380– 384, 2012.
[36] M. A. Chougule, G. P. Shailesh, G. Prasad R., M. Ramesh N., S. Shashwati and P. Vikas B., "Synthesis and Characterization of Polypyrrole (PPy) Thin Films," Soft Nanoscience Letters, vol. 1, pp. 6-10, 2011.
[37] Z. Xuetong, Z. Jin, S. Wenhui and L. Zhongfan, "Controllable Synthesis of Conducting Polypyrrole Nanostructures," The Journal of Physical Chemistry, vol. 110, pp. 1158-1165, 2006.
[38] P. F. Andrade, N. Gerson and D. Nelson, "Additive interaction of carbon dots extracted from soluble coffee and biogenic silver nanoparticles against bacteria," Journal of Physics, vol. 838, pp. 1-8, 2017.
[39] A. Kurdekar, C. L.A. Avinash and P. B. Eswarappa, "Comparative performance evaluation of carbon dot-based paper immunoassay on Whatman filter paper and nitrocellulose paper in the detection of HIV infection," Microfluidics and Nanofluidics, 2016.
[40] M. Hikita, C. Li and L. Khalid, "Optical properties of carbon microcoils," Journal of Applied Physics, vol. 104, pp. 1-4, 2014.
[41] A. Yu, V. Chabot and Z. Jiujun, Electrochemical Supercapacitors for Energy Storage and Delivery: Fundamentals and Applications, CRC Press, 2013.
[42] B. E. Conway, Electrochemical Supercapacitors: Scientific Fundamentals and Technological Applications, Ottawa, Ontario: Springer Science+Business Media, 1999.
[43] S. T. Senthilkumar, R. K. Selvan, Y. S. Lee and J. S. Melo, "Electric double layer capacitor and its improved specific capacitance using redox additive electrolyte," Journal of Materials Chemistry, vol. 1, p. 1086–1095, 2013.
[44] Y. Siyu, Y. Nianjun, V. Michael, M. Soumen, W. Oliver A., J. Siyu, S. Holger, Y. Bing and J. Xin, "Battery-like Supercapacitors from Vertically Aligned Carbon Nanofibers Coated Diamond: Design and Demonstrator," Advanced Energy Materials, vol. 8, pp. 1-10, 2018.