Hydrophilicity Improvement of Graphene Fibers for High-Performance Flexible Supercapacitor

Tuxiang Guan; Liming Shen; Ningzhong Bao

doi:10.1021/acs.iecr.9b02504

Hydrophilicity Improvement of Graphene Fibers for High-Performance Flexible Supercapacitor

Tuxiang Guan, Liming Shen, Ningzhong Bao

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

Super flexible graphene fibers (GFs) have great potential for yarn supercapacitors (YSCs) used in wearable devices. The performance of YSCs can be improved by increasing both the specific surface area and the hydrophilicity of GFs. Here, we report the continuous fabrication of hydrophilic GF by the wet spinning technique. The hydrothermal treatment of GF in KOH aqueous solution is the crucial step for the hydrophilicity improvement. The synthesized K-GF possesses a porous ruffle structure, excellent hydrophilicity, and good conductivity. The K-GF-based YSC shows good flexibility while folding from 0 to 180° and exhibits a capacitance of 145.6 mF/cm² at an energy density of 3.23 μW h/cm² and power density of 0.017 mW/cm².

Original language	English
Pages (from-to)	17338-17345
Number of pages	8
Journal	Industrial and Engineering Chemistry Research
Volume	58
Issue number	37
DOIs	https://doi.org/10.1021/acs.iecr.9b02504
State	Published - 18 Sep 2019

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title = "Hydrophilicity Improvement of Graphene Fibers for High-Performance Flexible Supercapacitor",

abstract = "Super flexible graphene fibers (GFs) have great potential for yarn supercapacitors (YSCs) used in wearable devices. The performance of YSCs can be improved by increasing both the specific surface area and the hydrophilicity of GFs. Here, we report the continuous fabrication of hydrophilic GF by the wet spinning technique. The hydrothermal treatment of GF in KOH aqueous solution is the crucial step for the hydrophilicity improvement. The synthesized K-GF possesses a porous ruffle structure, excellent hydrophilicity, and good conductivity. The K-GF-based YSC shows good flexibility while folding from 0 to 180° and exhibits a capacitance of 145.6 mF/cm2 at an energy density of 3.23 μW h/cm2 and power density of 0.017 mW/cm2.",

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AU - Shen, Liming

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N2 - Super flexible graphene fibers (GFs) have great potential for yarn supercapacitors (YSCs) used in wearable devices. The performance of YSCs can be improved by increasing both the specific surface area and the hydrophilicity of GFs. Here, we report the continuous fabrication of hydrophilic GF by the wet spinning technique. The hydrothermal treatment of GF in KOH aqueous solution is the crucial step for the hydrophilicity improvement. The synthesized K-GF possesses a porous ruffle structure, excellent hydrophilicity, and good conductivity. The K-GF-based YSC shows good flexibility while folding from 0 to 180° and exhibits a capacitance of 145.6 mF/cm2 at an energy density of 3.23 μW h/cm2 and power density of 0.017 mW/cm2.

AB - Super flexible graphene fibers (GFs) have great potential for yarn supercapacitors (YSCs) used in wearable devices. The performance of YSCs can be improved by increasing both the specific surface area and the hydrophilicity of GFs. Here, we report the continuous fabrication of hydrophilic GF by the wet spinning technique. The hydrothermal treatment of GF in KOH aqueous solution is the crucial step for the hydrophilicity improvement. The synthesized K-GF possesses a porous ruffle structure, excellent hydrophilicity, and good conductivity. The K-GF-based YSC shows good flexibility while folding from 0 to 180° and exhibits a capacitance of 145.6 mF/cm2 at an energy density of 3.23 μW h/cm2 and power density of 0.017 mW/cm2.

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Hydrophilicity Improvement of Graphene Fibers for High-Performance Flexible Supercapacitor

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