Coating of sulfur particles with manganese oxide nanowires as a cathode material in lithium-sulfur batteries

Jeongyeon Lee; Taejin Hwang; Yongho Lee; Joong Kee Lee; Wonchang Choi

doi:10.1016/j.matlet.2015.06.003

Coating of sulfur particles with manganese oxide nanowires as a cathode material in lithium-sulfur batteries

Jeongyeon Lee, Taejin Hwang, Yongho Lee, Joong Kee Lee, Wonchang Choi

Research output: Journal article publication › Journal article › Academic research › peer-review

43 Citations (Scopus)

Abstract

α-MnO₂ nanowires were synthesized by a hydrothermal method and then mixed with agglomerated sulfur powders. Homogeneous α-MnO₂-coated sulfur particles were obtained by utilizing heat treatment intended to melt and recrystallize the sulfur. α-MnO₂ nanowires lead to the suppression in re-agglomeration of sulfur powders during heat treatment and result in successful coating as well as decreased size in parent sulfur powders. The α-MnO₂-coated sulfur particles were used as the cathode material for lithium-ion battery applications. Electrochemical evaluation such as the rate capability characteristics and impedance study indicates that the α-MnO₂ coated sulfur cathode shows lower resistance and improved rate capability compared to a pristine sulfur cathode.

Original language	English
Pages (from-to)	132-135
Number of pages	4
Journal	Materials Letters
Volume	158
DOIs	https://doi.org/10.1016/j.matlet.2015.06.003
Publication status	Published - 11 Jun 2015

Keywords

Lithium-sulfur battery
Metallic oxide
Sulfur

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.matlet.2015.06.003

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title = "Coating of sulfur particles with manganese oxide nanowires as a cathode material in lithium-sulfur batteries",

abstract = "α-MnO2 nanowires were synthesized by a hydrothermal method and then mixed with agglomerated sulfur powders. Homogeneous α-MnO2-coated sulfur particles were obtained by utilizing heat treatment intended to melt and recrystallize the sulfur. α-MnO2 nanowires lead to the suppression in re-agglomeration of sulfur powders during heat treatment and result in successful coating as well as decreased size in parent sulfur powders. The α-MnO2-coated sulfur particles were used as the cathode material for lithium-ion battery applications. Electrochemical evaluation such as the rate capability characteristics and impedance study indicates that the α-MnO2 coated sulfur cathode shows lower resistance and improved rate capability compared to a pristine sulfur cathode.",

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author = "Jeongyeon Lee and Taejin Hwang and Yongho Lee and Lee, {Joong Kee} and Wonchang Choi",

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AU - Lee, Jeongyeon

AU - Hwang, Taejin

AU - Lee, Yongho

AU - Lee, Joong Kee

AU - Choi, Wonchang

N1 - Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government ( MEST ) ( NRF-2010-C1AAA001-2010-0028958 ), and the KIST Institutional Program (Project no. 2E25630 ). Publisher Copyright: © 2015 Elsevier B.V. All rights reserved.

PY - 2015/6/11

Y1 - 2015/6/11

N2 - α-MnO2 nanowires were synthesized by a hydrothermal method and then mixed with agglomerated sulfur powders. Homogeneous α-MnO2-coated sulfur particles were obtained by utilizing heat treatment intended to melt and recrystallize the sulfur. α-MnO2 nanowires lead to the suppression in re-agglomeration of sulfur powders during heat treatment and result in successful coating as well as decreased size in parent sulfur powders. The α-MnO2-coated sulfur particles were used as the cathode material for lithium-ion battery applications. Electrochemical evaluation such as the rate capability characteristics and impedance study indicates that the α-MnO2 coated sulfur cathode shows lower resistance and improved rate capability compared to a pristine sulfur cathode.

AB - α-MnO2 nanowires were synthesized by a hydrothermal method and then mixed with agglomerated sulfur powders. Homogeneous α-MnO2-coated sulfur particles were obtained by utilizing heat treatment intended to melt and recrystallize the sulfur. α-MnO2 nanowires lead to the suppression in re-agglomeration of sulfur powders during heat treatment and result in successful coating as well as decreased size in parent sulfur powders. The α-MnO2-coated sulfur particles were used as the cathode material for lithium-ion battery applications. Electrochemical evaluation such as the rate capability characteristics and impedance study indicates that the α-MnO2 coated sulfur cathode shows lower resistance and improved rate capability compared to a pristine sulfur cathode.

KW - Lithium-sulfur battery

KW - Metallic oxide

KW - Sulfur

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DO - 10.1016/j.matlet.2015.06.003

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SN - 0167-577X

VL - 158

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EP - 135

JO - Materials Letters

JF - Materials Letters

ER -

Coating of sulfur particles with manganese oxide nanowires as a cathode material in lithium-sulfur batteries

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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