Integration of tailored reduced graphene oxide nanosheets and electrospun polyamide-66 nanofabrics for a flexible supercapacitor with high-volume- and high-area-specific capacitance

Nanofiber fabric is firstly introduced to replace common microfiber fabrics as the platform for flexible supercapacitors. Nanofiber and microfiber electrodes can be simply fabricated using a dipping process that impregnates reduced graphene oxide (RGO) nanosheets into electrospun polyamide-66 (PA66)...

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Bibliographic Details
Published in:Carbon (New York) 2014-07, Vol.73, p.87-98
Main Authors: Wang, Yu-Sheng, Li, Shin-Ming, Hsiao, Sheng-Tsung, Liao, Wei-Hao, Chen, Po-Hsiang, Yang, Shin-Yi, Tien, Hsi-Wen, Ma, Chen-Chi M., Hu, Chi-Chang
Format: Article
Language:English
Subjects:
Capacitors
Cross-disciplinary physics: materials science
rheology
Electrodes
Electrospinning
Exact sciences and technology
Fabrics
Fullerenes and related materials
diamonds, graphite
Graphene
Materials science
Microfibers
Nanostructure
Physics
Specific materials
Supercapacitors
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Summary:Nanofiber fabric is firstly introduced to replace common microfiber fabrics as the platform for flexible supercapacitors. Nanofiber and microfiber electrodes can be simply fabricated using a dipping process that impregnates reduced graphene oxide (RGO) nanosheets into electrospun polyamide-66 (PA66) nanofiber and microfiber fabrics. RGO nanosheets are tailored to various sizes and only RGO with a medium diameter of 250–450nm (denoted as M-RGO) can effectively penetrate the pores of nanofiber fabrics for constructing smooth conductive paths within PA66 nanofiber fabrics. The synergistic effect between suitable sizes of RGO nanosheets and nanofiber fabrics with a high specific area provides a symmetric supercapacitor composed of M-RGO/PA66 nanofiber fabric electrodes with high-volume and high-area specific capacitance (CS,V and CS,A, equal to 38.79Fcm−3 and 0.931Fcm−2 at 0.5Ag−1, respectively), which are much larger than that of a symmetric supercapacitor composed of RGO/PA66 microfiber fabric electrodes (8.52Fcm−3 and 0.213Fcm−2 at 0.5Ag−1). The effect of impregnating nanofiber fabrics with suitably sized RGO to promote CS,V and CS,A of flexible supercapacitors has been demonstrated.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2014.02.043