Effects of synthesis temperature and precursor composition on the crystal structure, morphology, and electrode activity of 1D nanostructured manganese oxides

In Young Kim, Sun Hee Lee, Hyung Wook Ha, Tae Woo Kim, Yoon Soo Han, Jin Kyu Kang, Dong Ha Lee, Seong Ju Hwang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

1D nanostructured manganese oxides are prepared by oxidation reaction of precursor LiMn 2-x Cr x O 4 microcrystals under hydrothermal condition. The crystal structure and morphology of the obtained manganese oxides are strongly dependent on the reaction condition and the chemical composition of the precursors. The α-MnO 2 nanowires are prepared by reaction at 120 °C, and their aspect ratios decrease with the Cr content in the precursor. Treating precursors with persulfate ions at 160-180 °C yields the β-MnO 2 nanorods for the precursors LiMn 2-x Cr x O 4 with lower Cr content and the α-MnO 2 nanowires for the precursors with higher Cr content. The structure dependence of the products on the Cr content in the precursors is related to the high octahedral site stabilization energy of Cr 3+ ions and/or to the increase of Mn valence state upon Cr substitution. The increase of Cr content in the precursors degrades the electrode performance for the manganates prepared at 160 °C but improves electrode activity for those prepared at 180 °C. This observation can be explained by the structural variation and chromium substitution of the hydrothermally treated manganates. We conclude that the use of spinel LiMn 2-x Cr x O 4 as precursors provides an effective way to synthesize 1D nanostructured manganate with tailored crystal structure and morphology.

Original languageEnglish
Pages (from-to)6101-6107
Number of pages7
JournalJournal of Power Sources
Volume195
Issue number18
DOIs
Publication statusPublished - 2010 Sep 15

Fingerprint

Manganese oxide
manganese oxides
Nanowires
Substitution reactions
Crystal structure
Ions
Microcrystals
Electrodes
crystal structure
electrodes
Chromium
synthesis
Chemical analysis
Nanorods
crystal morphology
Aspect ratio
Stabilization
nanowires
Oxidation
Temperature

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

Kim, In Young ; Lee, Sun Hee ; Ha, Hyung Wook ; Kim, Tae Woo ; Han, Yoon Soo ; Kang, Jin Kyu ; Lee, Dong Ha ; Hwang, Seong Ju. / Effects of synthesis temperature and precursor composition on the crystal structure, morphology, and electrode activity of 1D nanostructured manganese oxides. In: Journal of Power Sources. 2010 ; Vol. 195, No. 18. pp. 6101-6107.
@article{a3ee80542fb64ea188cdde5f0538ee49,
title = "Effects of synthesis temperature and precursor composition on the crystal structure, morphology, and electrode activity of 1D nanostructured manganese oxides",
abstract = "1D nanostructured manganese oxides are prepared by oxidation reaction of precursor LiMn 2-x Cr x O 4 microcrystals under hydrothermal condition. The crystal structure and morphology of the obtained manganese oxides are strongly dependent on the reaction condition and the chemical composition of the precursors. The α-MnO 2 nanowires are prepared by reaction at 120 °C, and their aspect ratios decrease with the Cr content in the precursor. Treating precursors with persulfate ions at 160-180 °C yields the β-MnO 2 nanorods for the precursors LiMn 2-x Cr x O 4 with lower Cr content and the α-MnO 2 nanowires for the precursors with higher Cr content. The structure dependence of the products on the Cr content in the precursors is related to the high octahedral site stabilization energy of Cr 3+ ions and/or to the increase of Mn valence state upon Cr substitution. The increase of Cr content in the precursors degrades the electrode performance for the manganates prepared at 160 °C but improves electrode activity for those prepared at 180 °C. This observation can be explained by the structural variation and chromium substitution of the hydrothermally treated manganates. We conclude that the use of spinel LiMn 2-x Cr x O 4 as precursors provides an effective way to synthesize 1D nanostructured manganate with tailored crystal structure and morphology.",
author = "Kim, {In Young} and Lee, {Sun Hee} and Ha, {Hyung Wook} and Kim, {Tae Woo} and Han, {Yoon Soo} and Kang, {Jin Kyu} and Lee, {Dong Ha} and Hwang, {Seong Ju}",
year = "2010",
month = "9",
day = "15",
doi = "10.1016/j.jpowsour.2009.11.053",
language = "English",
volume = "195",
pages = "6101--6107",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",
number = "18",

}

Effects of synthesis temperature and precursor composition on the crystal structure, morphology, and electrode activity of 1D nanostructured manganese oxides. / Kim, In Young; Lee, Sun Hee; Ha, Hyung Wook; Kim, Tae Woo; Han, Yoon Soo; Kang, Jin Kyu; Lee, Dong Ha; Hwang, Seong Ju.

In: Journal of Power Sources, Vol. 195, No. 18, 15.09.2010, p. 6101-6107.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of synthesis temperature and precursor composition on the crystal structure, morphology, and electrode activity of 1D nanostructured manganese oxides

AU - Kim, In Young

AU - Lee, Sun Hee

AU - Ha, Hyung Wook

AU - Kim, Tae Woo

AU - Han, Yoon Soo

AU - Kang, Jin Kyu

AU - Lee, Dong Ha

AU - Hwang, Seong Ju

PY - 2010/9/15

Y1 - 2010/9/15

N2 - 1D nanostructured manganese oxides are prepared by oxidation reaction of precursor LiMn 2-x Cr x O 4 microcrystals under hydrothermal condition. The crystal structure and morphology of the obtained manganese oxides are strongly dependent on the reaction condition and the chemical composition of the precursors. The α-MnO 2 nanowires are prepared by reaction at 120 °C, and their aspect ratios decrease with the Cr content in the precursor. Treating precursors with persulfate ions at 160-180 °C yields the β-MnO 2 nanorods for the precursors LiMn 2-x Cr x O 4 with lower Cr content and the α-MnO 2 nanowires for the precursors with higher Cr content. The structure dependence of the products on the Cr content in the precursors is related to the high octahedral site stabilization energy of Cr 3+ ions and/or to the increase of Mn valence state upon Cr substitution. The increase of Cr content in the precursors degrades the electrode performance for the manganates prepared at 160 °C but improves electrode activity for those prepared at 180 °C. This observation can be explained by the structural variation and chromium substitution of the hydrothermally treated manganates. We conclude that the use of spinel LiMn 2-x Cr x O 4 as precursors provides an effective way to synthesize 1D nanostructured manganate with tailored crystal structure and morphology.

AB - 1D nanostructured manganese oxides are prepared by oxidation reaction of precursor LiMn 2-x Cr x O 4 microcrystals under hydrothermal condition. The crystal structure and morphology of the obtained manganese oxides are strongly dependent on the reaction condition and the chemical composition of the precursors. The α-MnO 2 nanowires are prepared by reaction at 120 °C, and their aspect ratios decrease with the Cr content in the precursor. Treating precursors with persulfate ions at 160-180 °C yields the β-MnO 2 nanorods for the precursors LiMn 2-x Cr x O 4 with lower Cr content and the α-MnO 2 nanowires for the precursors with higher Cr content. The structure dependence of the products on the Cr content in the precursors is related to the high octahedral site stabilization energy of Cr 3+ ions and/or to the increase of Mn valence state upon Cr substitution. The increase of Cr content in the precursors degrades the electrode performance for the manganates prepared at 160 °C but improves electrode activity for those prepared at 180 °C. This observation can be explained by the structural variation and chromium substitution of the hydrothermally treated manganates. We conclude that the use of spinel LiMn 2-x Cr x O 4 as precursors provides an effective way to synthesize 1D nanostructured manganate with tailored crystal structure and morphology.

UR - http://www.scopus.com/inward/record.url?scp=77953127897&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953127897&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2009.11.053

DO - 10.1016/j.jpowsour.2009.11.053

M3 - Article

AN - SCOPUS:77953127897

VL - 195

SP - 6101

EP - 6107

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

IS - 18

ER -