Preparation and Electrochemical Properties of Porous Carbon Fibers Derived from Cattail Fibers

doi:10.16552/j.cnki.issn1001-1625.2025.0181

Abstract

Abstract: Supercapacitors have become one of the most promising energy storage devices due to their high power density, rapid charge and discharge speed and long cycle life. In this paper, low-cost and environmentally friendly porous carbon fibers have been successfully designed and synthesized from the high temperature carbonization and KOH activation of the natural cattail fibers. The structure, morphology and electrochemical properties of porous carbon fibers were characterized by XRD, SEM, Raman spectroscopy, N₂ adsorption desorption and electrochemical measurements. The alkali-carbon ratio can significantly affect the structures and properties of porous carbon fibers. The porous carbon fibers ACF-4, which are prepared under carbonization at 800 ℃ and alkali-carbon ratio of 4 ∶1 (mass ratio), have the highest specific surface area of 1 910.4 m²·g^-1 and the largest micropore volume of 0.548 cm³·g^-1. The ACF-4 exhibits a high specific capacitance of 254.9 and 156.0 F·g^-1 at a current density of 0.05 and 5 A·g^-1, respectively. After 10 000 cycles at a current density of 1 A·g^-1, the ACF-4 displays an outstanding cycling stability of 98.1% capacitance retention.

Key words: cattail fiber, porous carbon fiber, supercapacitor, alkali-carbon ratio, specific capacity, cycling stability

CLC Number:

O646

WANG Chaonan, LI Xuefeng, WU Xinyue, YU Xiaoting, LI Jiali, YANG Limin, BAI Lizhong. Preparation and Electrochemical Properties of Porous Carbon Fibers Derived from Cattail Fibers[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(9): 3435-3443.

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