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Flexible Fiber Supercapacitor Using Biowaste‐Derived Porous Carbon
Author(s) -
Senthilkumar S. T.,
Selvan R. Kalai
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500090
Subject(s) - supercapacitor , gravimetric analysis , materials science , carbonization , capacitance , fiber , electrolyte , porosity , power density , carbon fibers , composite material , thermogravimetric analysis , electrode , chemical engineering , scanning electron microscope , chemistry , composite number , organic chemistry , power (physics) , physics , quantum mechanics , engineering
Abstract A flexible fiber supercapacitor (SC) was fabricated by using porous carbon as the electrode material and polyvinylalcohol–H 3 PO 4 as the gel‐polymer electrolyte. The porous carbon was derived from dead Ficus religiosa leaves through a single‐step carbonization method and characterized by using BET surface area and TEM analysis as well as XRD, Raman, and FTIR techniques. The fabricated fiber SC works up to 0.8 V and delivers a gravimetric (length) capacitance of 3.4 F g −1 (4.2 mF cm −1 ) at 1 mA. In addition, it exhibits a maximum gravimetric (length) energy density of 311 mWh kg −1 (37.3×10 −8 Wh cm −1 ) at a power density of 58 W kg −1 (70.3 μW cm −1 ) with a capacitance retention of 88 % over 4000 cycles.