Research on Preparation and Electrochemical Properties of Flexible Carbon Nanofiber Membrane Derived from PAN/Benzoxazine

doi:10.19491/j.issn.1001-9278.2021.02.006

Abstract

Abstract:

A carbon nanofiber membrane with good flexibility was prepared through electrospinning with a mixture of benzoxazine， PAN and iron acetylacetonate. The results indicated that the N， O and S heteroatoms were successfully introduced into the as?prepared carbon nanofiber membrane through electrospinning in terms of the chemical structure designed benzoxazine， and these introduced heteroatoms effectively enhanced the pseudocapacitance of the electrode and its wettability with the electrolyte. Furthermore， eco?friendly Fe₃O₄ with excellent pseudocapacitance was deposited on the surface of the carbon nanofiber membrane to obtain a flexible supercapacitor electrode material （Fe₃O₄@BENCNFs） with excellent electrochemical performance. The three?electrode test results indicated that the Fe₃O₄@BENCNFs achieved a specific capacity of 160.1 F/g at a current density of 1 A/g.

Key words: electrospinning, carbon nanofiber membrane, benzoxazine, electrochemical property

CLC Number:

TQ315.8

LIU Yuan, NIE Shengqiang, ZHANG Chunmei, WANG Yi, XIE Xiangyu, LUO Jun. Research on Preparation and Electrochemical Properties of Flexible Carbon Nanofiber Membrane Derived from PAN/Benzoxazine[J]. China Plastics, 2021, 35(2): 34-40.

Figures/Tables 13

Fig.1. Synthesis of the benzoxazine monomer

Fig.2. NMR spectra of the benzoxazine monomer

Fig.3. DSC curve of the curing reaction of benzoxazine monomer

Fig.4. TG curve of the cured benzoxazine

Fig.5. The images of the cured benzoxazine before and after thermal degradation

Fig.6. Element results of benzoxazine, cured benzoxazine and carbon residue

样品	元素组成/%
样品	C	H	N	S
苯并噁嗪单体	63.98	4.69	5.23	6.37
苯并噁嗪固化物	63.15	4.66	5.36	6.48
残炭	80.84	2.26	4.35	2.54

Tab.1. Element analysis results of benzoxazine, cured benzoxazine and carbon residue

Fig.7. SEM of the nanofibers

Fig.8. Digital images of flexibilities of CNFs and Fe3O4@BENCNFs

Fig.9. SEM of Fe3O4@BENCNFs and its C, N, O, S and Fe elemental mapping images

Fig.10. XPS spectra of the carbons nanofibers

Fig.11. Raman spectra of Fe3O4@BENCNFs

Fig.12. Electrochemical performances of Fe3O4@BENCNFs

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