Sodium-ion storage performance of hierarchically structured (Co1/3Fe2/3)Se2 nanofibers with fiber-in-tube nanostructures

Young Jun Hong; Jung Hyun Kim; Yun Chan Kang

doi:10.1039/c6ta07354a

Sodium-ion storage performance of hierarchically structured (Co_1/3Fe_2/3)Se₂ nanofibers with fiber-in-tube nanostructures

Young Jun Hong, Jung Hyun Kim, Yun Chan Kang

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

41 Citations (Scopus)

Abstract

Nanostructured multicomponent metal selenide materials and their carbon composite materials have been studied as anode materials for sodium-ion batteries (SIBs). Hierarchically structured (Co_1/3Fe_2/3)Se₂ nanofibers with fiber-in-tube nanostructures and (Co_1/3Fe_2/3)Se₂-C composite nanofibers with filled structures were prepared by electrospinning with subsequent selenization. Selenization of the CoFe₂O₄ nanofibers formed rod-type (Co_1/3Fe_2/3)Se₂ nanocrystals, and the tube-in-tube nanostructures of the nanofibers transformed into fiber-in-tube structures during this process. The discharge capacities of the hierarchically structured (Co_1/3Fe_2/3)Se₂ nanofibers and (Co_1/3Fe_2/3)Se₂-Se-C composite nanofibers were 594 and 512 mA h g^-1 (for the 60th cycle at a current density of 0.3 A g^-1), respectively, and their corresponding capacity retentions measured from the 2^nd cycle were almost 100%. The reversible discharge capacity of the hierarchically structured (Co_1/3Fe_2/3)Se₂ nanofibers decreased slightly from 585 to 497 mA h g^-1 as the current density was increased from 0.1 to 5.0 A g^-1. However, the reversible discharge capacity of the (Co_1/3Fe_2/3)Se₂-Se-C composite nanofibers decreased from 543 to 359 mA h g^-1 as the current density was increased from 0.1 to 5.0 A g^-1. The uniquely structured (Co_1/3Fe_2/3)Se₂ nanofibers with fiber-in-tube structures and featuring highly crystallized ultrafine nanorods (which have high electrical conductivity) showed superior rate performance compared to the (Co_1/3Fe_2/3)Se₂-Se-C composite nanofibers with filled structures.

Original language	English
Pages (from-to)	15471-15477
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	4
Issue number	40
DOIs	https://doi.org/10.1039/c6ta07354a
Publication status	Published - 2016

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (NRF-2015R1A2A1A15056049). This work was supported by the Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (201320200000420 and 20153030091450).

Publisher Copyright:
© 2016 The Royal Society of Chemistry.

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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Access to Document

10.1039/c6ta07354a

Cite this

@article{5488a0d33e5e43c785034e6e1646b5d8,

title = "Sodium-ion storage performance of hierarchically structured (Co1/3Fe2/3)Se2 nanofibers with fiber-in-tube nanostructures",

abstract = "Nanostructured multicomponent metal selenide materials and their carbon composite materials have been studied as anode materials for sodium-ion batteries (SIBs). Hierarchically structured (Co1/3Fe2/3)Se2 nanofibers with fiber-in-tube nanostructures and (Co1/3Fe2/3)Se2-C composite nanofibers with filled structures were prepared by electrospinning with subsequent selenization. Selenization of the CoFe2O4 nanofibers formed rod-type (Co1/3Fe2/3)Se2 nanocrystals, and the tube-in-tube nanostructures of the nanofibers transformed into fiber-in-tube structures during this process. The discharge capacities of the hierarchically structured (Co1/3Fe2/3)Se2 nanofibers and (Co1/3Fe2/3)Se2-Se-C composite nanofibers were 594 and 512 mA h g-1 (for the 60th cycle at a current density of 0.3 A g-1), respectively, and their corresponding capacity retentions measured from the 2nd cycle were almost 100%. The reversible discharge capacity of the hierarchically structured (Co1/3Fe2/3)Se2 nanofibers decreased slightly from 585 to 497 mA h g-1 as the current density was increased from 0.1 to 5.0 A g-1. However, the reversible discharge capacity of the (Co1/3Fe2/3)Se2-Se-C composite nanofibers decreased from 543 to 359 mA h g-1 as the current density was increased from 0.1 to 5.0 A g-1. The uniquely structured (Co1/3Fe2/3)Se2 nanofibers with fiber-in-tube structures and featuring highly crystallized ultrafine nanorods (which have high electrical conductivity) showed superior rate performance compared to the (Co1/3Fe2/3)Se2-Se-C composite nanofibers with filled structures.",

author = "Hong, {Young Jun} and Kim, {Jung Hyun} and {Chan Kang}, Yun",

note = "Funding Information: This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (NRF-2015R1A2A1A15056049). This work was supported by the Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (201320200000420 and 20153030091450). Publisher Copyright: {\textcopyright} 2016 The Royal Society of Chemistry.",

year = "2016",

doi = "10.1039/c6ta07354a",

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AU - Hong, Young Jun

AU - Kim, Jung Hyun

AU - Chan Kang, Yun

N1 - Funding Information: This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (NRF-2015R1A2A1A15056049). This work was supported by the Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (201320200000420 and 20153030091450). Publisher Copyright: © 2016 The Royal Society of Chemistry.

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N2 - Nanostructured multicomponent metal selenide materials and their carbon composite materials have been studied as anode materials for sodium-ion batteries (SIBs). Hierarchically structured (Co1/3Fe2/3)Se2 nanofibers with fiber-in-tube nanostructures and (Co1/3Fe2/3)Se2-C composite nanofibers with filled structures were prepared by electrospinning with subsequent selenization. Selenization of the CoFe2O4 nanofibers formed rod-type (Co1/3Fe2/3)Se2 nanocrystals, and the tube-in-tube nanostructures of the nanofibers transformed into fiber-in-tube structures during this process. The discharge capacities of the hierarchically structured (Co1/3Fe2/3)Se2 nanofibers and (Co1/3Fe2/3)Se2-Se-C composite nanofibers were 594 and 512 mA h g-1 (for the 60th cycle at a current density of 0.3 A g-1), respectively, and their corresponding capacity retentions measured from the 2nd cycle were almost 100%. The reversible discharge capacity of the hierarchically structured (Co1/3Fe2/3)Se2 nanofibers decreased slightly from 585 to 497 mA h g-1 as the current density was increased from 0.1 to 5.0 A g-1. However, the reversible discharge capacity of the (Co1/3Fe2/3)Se2-Se-C composite nanofibers decreased from 543 to 359 mA h g-1 as the current density was increased from 0.1 to 5.0 A g-1. The uniquely structured (Co1/3Fe2/3)Se2 nanofibers with fiber-in-tube structures and featuring highly crystallized ultrafine nanorods (which have high electrical conductivity) showed superior rate performance compared to the (Co1/3Fe2/3)Se2-Se-C composite nanofibers with filled structures.

AB - Nanostructured multicomponent metal selenide materials and their carbon composite materials have been studied as anode materials for sodium-ion batteries (SIBs). Hierarchically structured (Co1/3Fe2/3)Se2 nanofibers with fiber-in-tube nanostructures and (Co1/3Fe2/3)Se2-C composite nanofibers with filled structures were prepared by electrospinning with subsequent selenization. Selenization of the CoFe2O4 nanofibers formed rod-type (Co1/3Fe2/3)Se2 nanocrystals, and the tube-in-tube nanostructures of the nanofibers transformed into fiber-in-tube structures during this process. The discharge capacities of the hierarchically structured (Co1/3Fe2/3)Se2 nanofibers and (Co1/3Fe2/3)Se2-Se-C composite nanofibers were 594 and 512 mA h g-1 (for the 60th cycle at a current density of 0.3 A g-1), respectively, and their corresponding capacity retentions measured from the 2nd cycle were almost 100%. The reversible discharge capacity of the hierarchically structured (Co1/3Fe2/3)Se2 nanofibers decreased slightly from 585 to 497 mA h g-1 as the current density was increased from 0.1 to 5.0 A g-1. However, the reversible discharge capacity of the (Co1/3Fe2/3)Se2-Se-C composite nanofibers decreased from 543 to 359 mA h g-1 as the current density was increased from 0.1 to 5.0 A g-1. The uniquely structured (Co1/3Fe2/3)Se2 nanofibers with fiber-in-tube structures and featuring highly crystallized ultrafine nanorods (which have high electrical conductivity) showed superior rate performance compared to the (Co1/3Fe2/3)Se2-Se-C composite nanofibers with filled structures.

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