A comparative study of reaction mechanism of MoS2 negative electrode materials for sodium-ion batteries

Jihyun Jang; Heechul Jung; Seung M. Oh; Ji Heon Ryu

doi:10.1016/j.jallcom.2021.160182

A comparative study of reaction mechanism of MoS₂ negative electrode materials for sodium-ion batteries

Jihyun Jang
, Heechul Jung
, Seung M. Oh
, Ji Heon Ryu

Dept. of Future Energy Convergence

Seoul National University
Tech University of Korea

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

8 Scopus citations

Abstract

Sodium-ion batteries (SIBs) are becoming increasingly popular because of their low cost and the relative abundance of sodium compared to lithium. However, the energy density of SIBs is low and needs to be improved. In this study, the reaction mechanism of MoS₂ as a high-capacity negative electrode for SIBs is studied through the electrochemical and spectroscopic analyses. MoS₂ undergoes an insertion reaction with sodium, which is followed by a conversion reaction. A comparative study of MoS₂ with MoO₂ reveals that MoS₂ can store sodium through the insertion reaction because it has a larger interlayer distance than that of MoO₂. In addition, the bonds of MoS₂ are weaker than those of MoO₂, which favors the conversion reaction of MoS₂ with sodium.

Original language	English
Article number	160182
Journal	Journal of Alloys and Compounds
Volume	876
DOIs	https://doi.org/10.1016/j.jallcom.2021.160182
State	Published - 25 Sep 2021

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Conversion reaction
Material design
Molybdenum sulfide
Reactivity with sodium
Sodium-ion battery

Access to Document

10.1016/j.jallcom.2021.160182

Cite this

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title = "A comparative study of reaction mechanism of MoS2 negative electrode materials for sodium-ion batteries",

abstract = "Sodium-ion batteries (SIBs) are becoming increasingly popular because of their low cost and the relative abundance of sodium compared to lithium. However, the energy density of SIBs is low and needs to be improved. In this study, the reaction mechanism of MoS2 as a high-capacity negative electrode for SIBs is studied through the electrochemical and spectroscopic analyses. MoS2 undergoes an insertion reaction with sodium, which is followed by a conversion reaction. A comparative study of MoS2 with MoO2 reveals that MoS2 can store sodium through the insertion reaction because it has a larger interlayer distance than that of MoO2. In addition, the bonds of MoS2 are weaker than those of MoO2, which favors the conversion reaction of MoS2 with sodium.",

keywords = "Conversion reaction, Material design, Molybdenum sulfide, Reactivity with sodium, Sodium-ion battery",

author = "Jihyun Jang and Heechul Jung and Oh, \{Seung M.\} and Ryu, \{Ji Heon\}",

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AU - Jang, Jihyun

AU - Jung, Heechul

AU - Oh, Seung M.

AU - Ryu, Ji Heon

PY - 2021/9/25

Y1 - 2021/9/25

N2 - Sodium-ion batteries (SIBs) are becoming increasingly popular because of their low cost and the relative abundance of sodium compared to lithium. However, the energy density of SIBs is low and needs to be improved. In this study, the reaction mechanism of MoS2 as a high-capacity negative electrode for SIBs is studied through the electrochemical and spectroscopic analyses. MoS2 undergoes an insertion reaction with sodium, which is followed by a conversion reaction. A comparative study of MoS2 with MoO2 reveals that MoS2 can store sodium through the insertion reaction because it has a larger interlayer distance than that of MoO2. In addition, the bonds of MoS2 are weaker than those of MoO2, which favors the conversion reaction of MoS2 with sodium.

AB - Sodium-ion batteries (SIBs) are becoming increasingly popular because of their low cost and the relative abundance of sodium compared to lithium. However, the energy density of SIBs is low and needs to be improved. In this study, the reaction mechanism of MoS2 as a high-capacity negative electrode for SIBs is studied through the electrochemical and spectroscopic analyses. MoS2 undergoes an insertion reaction with sodium, which is followed by a conversion reaction. A comparative study of MoS2 with MoO2 reveals that MoS2 can store sodium through the insertion reaction because it has a larger interlayer distance than that of MoO2. In addition, the bonds of MoS2 are weaker than those of MoO2, which favors the conversion reaction of MoS2 with sodium.

KW - Conversion reaction

KW - Material design

KW - Molybdenum sulfide

KW - Reactivity with sodium

KW - Sodium-ion battery

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