Superior electrochemical properties of α-Fe2O3 nanofibers with a porous core/dense shell structure formed from iron acetylacetonate-polyvinylpyrrolidone composite fibers

Jung Hyun Kim, Young Jun Hong, Yun Chan Kang, Yun Ju Choi, Yang Soo Kim

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Porous core/dense shell α-Fe2O3 nanofibers were prepared by heat-treating electrospun gel nanofibers containing iron acetylacetonate-polyvinylpyrrolidone at 500 °C. Diffusion of Fe to the outer part of the nanofibers during the heating process results in a polyvinylpyrrolidone (PVP)-rich interior. Combustion of phase separated nanofibers produces α-Fe2O3 nanofibers with a porous core/dense shell structure. The nanofiber shell thickness and core diameter are 26 and 130 nm, respectively. The initial discharge and charge capacities of the α-Fe2O3 nanofibers at a current density of 1000 mA g-1 are 1392 and 1112 mA h g-1, respectively; the discharge capacities for the 2nd and 100th cycles are 1149 and 1225 mA h g-1, respectively. The stable reversible discharge capacities of the nanofibers decreased from 1198 to 1061 mA h g-1 as the current density increased from 500 to 3000 mA g-1.

Original languageEnglish
Pages (from-to)211-218
Number of pages8
JournalElectrochimica Acta
Volume154
DOIs
Publication statusPublished - 2015 Feb 1

Fingerprint

Povidone
Nanofibers
Electrochemical properties
Iron
Fibers
Composite materials
Current density
Industrial heating
acetyl acetonate
Gels

Keywords

  • Electrospinning
  • Energy conversion
  • Energy storage materials
  • Nanostructures
  • Synthesis design

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Superior electrochemical properties of α-Fe2O3 nanofibers with a porous core/dense shell structure formed from iron acetylacetonate-polyvinylpyrrolidone composite fibers. / Kim, Jung Hyun; Hong, Young Jun; Kang, Yun Chan; Choi, Yun Ju; Kim, Yang Soo.

In: Electrochimica Acta, Vol. 154, 01.02.2015, p. 211-218.

Research output: Contribution to journalArticle

@article{08dbbe8f134f4b3486f6795364168739,
title = "Superior electrochemical properties of α-Fe2O3 nanofibers with a porous core/dense shell structure formed from iron acetylacetonate-polyvinylpyrrolidone composite fibers",
abstract = "Porous core/dense shell α-Fe2O3 nanofibers were prepared by heat-treating electrospun gel nanofibers containing iron acetylacetonate-polyvinylpyrrolidone at 500 °C. Diffusion of Fe to the outer part of the nanofibers during the heating process results in a polyvinylpyrrolidone (PVP)-rich interior. Combustion of phase separated nanofibers produces α-Fe2O3 nanofibers with a porous core/dense shell structure. The nanofiber shell thickness and core diameter are 26 and 130 nm, respectively. The initial discharge and charge capacities of the α-Fe2O3 nanofibers at a current density of 1000 mA g-1 are 1392 and 1112 mA h g-1, respectively; the discharge capacities for the 2nd and 100th cycles are 1149 and 1225 mA h g-1, respectively. The stable reversible discharge capacities of the nanofibers decreased from 1198 to 1061 mA h g-1 as the current density increased from 500 to 3000 mA g-1.",
keywords = "Electrospinning, Energy conversion, Energy storage materials, Nanostructures, Synthesis design",
author = "Kim, {Jung Hyun} and Hong, {Young Jun} and Kang, {Yun Chan} and Choi, {Yun Ju} and Kim, {Yang Soo}",
year = "2015",
month = "2",
day = "1",
doi = "10.1016/j.electacta.2014.11.181",
language = "English",
volume = "154",
pages = "211--218",
journal = "Electrochimica Acta",
issn = "0013-4686",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Superior electrochemical properties of α-Fe2O3 nanofibers with a porous core/dense shell structure formed from iron acetylacetonate-polyvinylpyrrolidone composite fibers

AU - Kim, Jung Hyun

AU - Hong, Young Jun

AU - Kang, Yun Chan

AU - Choi, Yun Ju

AU - Kim, Yang Soo

PY - 2015/2/1

Y1 - 2015/2/1

N2 - Porous core/dense shell α-Fe2O3 nanofibers were prepared by heat-treating electrospun gel nanofibers containing iron acetylacetonate-polyvinylpyrrolidone at 500 °C. Diffusion of Fe to the outer part of the nanofibers during the heating process results in a polyvinylpyrrolidone (PVP)-rich interior. Combustion of phase separated nanofibers produces α-Fe2O3 nanofibers with a porous core/dense shell structure. The nanofiber shell thickness and core diameter are 26 and 130 nm, respectively. The initial discharge and charge capacities of the α-Fe2O3 nanofibers at a current density of 1000 mA g-1 are 1392 and 1112 mA h g-1, respectively; the discharge capacities for the 2nd and 100th cycles are 1149 and 1225 mA h g-1, respectively. The stable reversible discharge capacities of the nanofibers decreased from 1198 to 1061 mA h g-1 as the current density increased from 500 to 3000 mA g-1.

AB - Porous core/dense shell α-Fe2O3 nanofibers were prepared by heat-treating electrospun gel nanofibers containing iron acetylacetonate-polyvinylpyrrolidone at 500 °C. Diffusion of Fe to the outer part of the nanofibers during the heating process results in a polyvinylpyrrolidone (PVP)-rich interior. Combustion of phase separated nanofibers produces α-Fe2O3 nanofibers with a porous core/dense shell structure. The nanofiber shell thickness and core diameter are 26 and 130 nm, respectively. The initial discharge and charge capacities of the α-Fe2O3 nanofibers at a current density of 1000 mA g-1 are 1392 and 1112 mA h g-1, respectively; the discharge capacities for the 2nd and 100th cycles are 1149 and 1225 mA h g-1, respectively. The stable reversible discharge capacities of the nanofibers decreased from 1198 to 1061 mA h g-1 as the current density increased from 500 to 3000 mA g-1.

KW - Electrospinning

KW - Energy conversion

KW - Energy storage materials

KW - Nanostructures

KW - Synthesis design

UR - http://www.scopus.com/inward/record.url?scp=84919929883&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84919929883&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2014.11.181

DO - 10.1016/j.electacta.2014.11.181

M3 - Article

AN - SCOPUS:84919929883

VL - 154

SP - 211

EP - 218

JO - Electrochimica Acta

JF - Electrochimica Acta

SN - 0013-4686

ER -