Fabrication and characterization of carbon nanofiber@mesoporous carbon core-shell composite for the Li-air battery

Myeong Jun Song, Moo Whan Shin

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In this study, we successfully design and synthesize the mesoporous carbon coated carbon nanofibers (CNF@mesoCs) for the Li-air battery. The composites are fabricated via electrospinning technique and nanocasting strategy. After mesoporous carbon coating process, the composites have retained their original one-dimensional structure as pristine carbon nanofibers. Every nanofiber entangles with each other to form a three-dimensional cross-linked web structure. Because of the mesoporous carbon coating on carbon nanofibers, the surface area increases from 708 m 2 g -1 to 2194 m 2 g -1 . We confirm that the mesoporous carbon coated on carbon nanofibers is well-graphitized by analysis of Raman spectra. The graphitized surface of CNF@mesoCs (4.638 S cm -1 ) is believed to result in their higher electrical conductivity than that of pristine carbon nanofibers (3.0759 S cm -1 ). Without employment of any binders and metal foams, the cathode of CNF@mesoCs exhibits high discharge capacity of 4000 mA h g -1 , which is much higher than that from pristine carbon nanofibers (2750 mA h g -1 ). This work demonstrates that the fabricated CNF@mesoCs structures have a great potential to be employed as light-weight and efficient electrode for energy storage and conversion devices.

Original languageEnglish
Pages (from-to)435-440
Number of pages6
JournalApplied Surface Science
Volume320
DOIs
Publication statusPublished - 2014 Nov 30

Fingerprint

Carbon nanofibers
electric batteries
Carbon
Fabrication
fabrication
composite materials
carbon
air
Composite materials
Air
Coatings
Electrospinning
Nanofibers
Energy conversion
Energy storage
Binders
Foams
Raman scattering
metal foams
Cathodes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

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abstract = "In this study, we successfully design and synthesize the mesoporous carbon coated carbon nanofibers (CNF@mesoCs) for the Li-air battery. The composites are fabricated via electrospinning technique and nanocasting strategy. After mesoporous carbon coating process, the composites have retained their original one-dimensional structure as pristine carbon nanofibers. Every nanofiber entangles with each other to form a three-dimensional cross-linked web structure. Because of the mesoporous carbon coating on carbon nanofibers, the surface area increases from 708 m 2 g -1 to 2194 m 2 g -1 . We confirm that the mesoporous carbon coated on carbon nanofibers is well-graphitized by analysis of Raman spectra. The graphitized surface of CNF@mesoCs (4.638 S cm -1 ) is believed to result in their higher electrical conductivity than that of pristine carbon nanofibers (3.0759 S cm -1 ). Without employment of any binders and metal foams, the cathode of CNF@mesoCs exhibits high discharge capacity of 4000 mA h g -1 , which is much higher than that from pristine carbon nanofibers (2750 mA h g -1 ). This work demonstrates that the fabricated CNF@mesoCs structures have a great potential to be employed as light-weight and efficient electrode for energy storage and conversion devices.",
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Fabrication and characterization of carbon nanofiber@mesoporous carbon core-shell composite for the Li-air battery. / Song, Myeong Jun; Shin, Moo Whan.

In: Applied Surface Science, Vol. 320, 30.11.2014, p. 435-440.

Research output: Contribution to journalArticle

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AB - In this study, we successfully design and synthesize the mesoporous carbon coated carbon nanofibers (CNF@mesoCs) for the Li-air battery. The composites are fabricated via electrospinning technique and nanocasting strategy. After mesoporous carbon coating process, the composites have retained their original one-dimensional structure as pristine carbon nanofibers. Every nanofiber entangles with each other to form a three-dimensional cross-linked web structure. Because of the mesoporous carbon coating on carbon nanofibers, the surface area increases from 708 m 2 g -1 to 2194 m 2 g -1 . We confirm that the mesoporous carbon coated on carbon nanofibers is well-graphitized by analysis of Raman spectra. The graphitized surface of CNF@mesoCs (4.638 S cm -1 ) is believed to result in their higher electrical conductivity than that of pristine carbon nanofibers (3.0759 S cm -1 ). Without employment of any binders and metal foams, the cathode of CNF@mesoCs exhibits high discharge capacity of 4000 mA h g -1 , which is much higher than that from pristine carbon nanofibers (2750 mA h g -1 ). This work demonstrates that the fabricated CNF@mesoCs structures have a great potential to be employed as light-weight and efficient electrode for energy storage and conversion devices.

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