Flexible fiber hybrid supercapacitor with NiCo2O4 nanograss@carbon fiber and bio-waste derived high surface area porous carbon

By S. T. Senthilkumar, Nianqing Fu, Yan Liu, Yu Wang, Limin Zhou, Haitao Huang. 2016

138 citations recorded by the source corpus.

Abstract Flexible, light weight and portable energy storage devices are receiving much attention for flexible electronic applications. Nonetheless, these conventional two-dimensional (2D) or planar structured flexible energy storage devices could not meet the demand for wearable or textile electronics. To meet this demand, in this work, a novel flexible fiber hybrid supercapacitor (HSC) is fabricated using NiCo2O4 nanograss (NG)-array coated carbon fiber (NiCo2O4 NG@CF) as the positive electrode to provide a pseudocapacitance and porous carbon coated carbon fiber electrode as the negative electrode to provide an electric double-layer capacitance (EDLC). Particularly, the porous carbon is prepared from Lemon peel waste to obtain a low cost electrode material. Interestingly, the fabricated HSC exhibits a maximum specific capacitance of 17.5 F g−1 (25.03 mF cm−2) and an energy density of 6.61 Wh kg−1 (9.46 μWh cm−2) at the current of 1 mA, which is far better than previous reports. Moreover, three knitted fiber HSCs connected in series could successfully power up a red LED, even at a folded condition. It is believed that this type of fiber HSC could be a potential candidate for flexible/wearable electronic applications.

Subfields: Biomaterials, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/938e0051e8c31b552042e883ec43cccc5fadfabc