Revisiting the conversion reaction in ultrafine SnO2 nanoparticles for exceptionally high-capacity Li-ion battery anodes: The synergetic effect of graphene and copper

Da Sol Kim; Hyun Woo Shim; Mushtaq Ahmad Dar; Hyunseok Yoon; Hee Jo Song; Dong Wan Kim

doi:10.1016/j.jallcom.2018.08.076

Revisiting the conversion reaction in ultrafine SnO₂ nanoparticles for exceptionally high-capacity Li-ion battery anodes: The synergetic effect of graphene and copper

Da Sol Kim
, Hyun Woo Shim
, Mushtaq Ahmad Dar
, Hyunseok Yoon
, Hee Jo Song
, Dong Wan Kim^*

^*Corresponding author for this work

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

9 Citations (Scopus)

Abstract

Generally, in SnO₂-based anode materials, the reversible alloying/dealloying reaction is the main Li-ion storage mechanism. Interestingly, these materials can show an exceptionally high capacity that is beyond the theoretical value (i.e., 783 mA h g⁻¹ based on Sn + 4.4Li⁺ + 4.4e⁻ ⇌ Li_4.4Sn reaction), owing to the reversibility of the reaction between Sn and Li₂O to form SnO_x (x = 1, 2), so-called conversion reaction. Herein, we prepare Cu-reduced graphene oxide (rGO)-SnO₂ nanocomposites as a model system in order to demonstrate an effective strategy to improve the reversibility of the conversion reaction in SnO₂. The incorporation of rGO can prevent the aggregation of SnO₂ nanoparticles. Furthermore, the Cu-rGO-SnO₂ nanocomposite exhibits the most improved conversion reaction reversibility, resulting in improved cycling performance and high capacity. Ex-situ transmission electron microscopy analysis confirms the high reversibility of the conversion as well as the alloying/dealloying reactions. Also, Cu nanoparticles promote the decomposition of amorphous Li₂O, leading to enhancement of the conversion reaction between Sn and Li₂O. Therefore, these results demonstrate a strategy for significantly improving the electrochemical performances of SnO₂-based anodes for Li-ion batteries.

Original language	English
Pages (from-to)	1113-1120
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	769
DOIs	https://doi.org/10.1016/j.jallcom.2018.08.076
Publication status	Published - 2018 Nov 15

Bibliographical note

Funding Information:
This work was supported by a Korea University Grant, by the R&D Center for Valuable Recycling(Global-Top R&BD Program) of the Ministry of Environment (Project No.: R2-17-2016002250005 ), and by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning ( NRF-2016R1A2B2012728 ). The authors extend their appreciation to the International Scientific Partnership Program ISPP at King Saud University for funding this research work through ISPP# 0076 ).

Funding Information:
This work was supported by a Korea University Grant, by the R&D Center for Valuable Recycling(Global-Top R&BD Program) of the Ministry of Environment (Project No.: R2-17-2016002250005), and by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning (NRF-2016R1A2B2012728). The authors extend their appreciation to the International Scientific Partnership Program ISPP at King Saud University for funding this research work through ISPP# 0076).

Keywords

Conversion reaction
Cu
Graphene
Lithium-ion battery
SnO

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

UN SDGs

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

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10.1016/j.jallcom.2018.08.076

Cite this

@article{834b60cf65e840e6abfec122e65f6b84,

title = "Revisiting the conversion reaction in ultrafine SnO2 nanoparticles for exceptionally high-capacity Li-ion battery anodes: The synergetic effect of graphene and copper",

abstract = "Generally, in SnO2-based anode materials, the reversible alloying/dealloying reaction is the main Li-ion storage mechanism. Interestingly, these materials can show an exceptionally high capacity that is beyond the theoretical value (i.e., 783 mA h g−1 based on Sn + 4.4Li+ + 4.4e− ⇌ Li4.4Sn reaction), owing to the reversibility of the reaction between Sn and Li2O to form SnOx (x = 1, 2), so-called conversion reaction. Herein, we prepare Cu-reduced graphene oxide (rGO)-SnO2 nanocomposites as a model system in order to demonstrate an effective strategy to improve the reversibility of the conversion reaction in SnO2. The incorporation of rGO can prevent the aggregation of SnO2 nanoparticles. Furthermore, the Cu-rGO-SnO2 nanocomposite exhibits the most improved conversion reaction reversibility, resulting in improved cycling performance and high capacity. Ex-situ transmission electron microscopy analysis confirms the high reversibility of the conversion as well as the alloying/dealloying reactions. Also, Cu nanoparticles promote the decomposition of amorphous Li2O, leading to enhancement of the conversion reaction between Sn and Li2O. Therefore, these results demonstrate a strategy for significantly improving the electrochemical performances of SnO2-based anodes for Li-ion batteries.",

keywords = "Conversion reaction, Cu, Graphene, Lithium-ion battery, SnO",

author = "Kim, \{Da Sol\} and Shim, \{Hyun Woo\} and Dar, \{Mushtaq Ahmad\} and Hyunseok Yoon and Song, \{Hee Jo\} and Kim, \{Dong Wan\}",

note = "Funding Information: This work was supported by a Korea University Grant, by the R\&D Center for Valuable Recycling(Global-Top R\&BD Program) of the Ministry of Environment (Project No.: R2-17-2016002250005 ), and by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning ( NRF-2016R1A2B2012728 ). The authors extend their appreciation to the International Scientific Partnership Program ISPP at King Saud University for funding this research work through ISPP\# 0076 ). Funding Information: This work was supported by a Korea University Grant, by the R\&D Center for Valuable Recycling(Global-Top R\&BD Program) of the Ministry of Environment (Project No.: R2-17-2016002250005), and by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning (NRF-2016R1A2B2012728). The authors extend their appreciation to the International Scientific Partnership Program ISPP at King Saud University for funding this research work through ISPP\# 0076).",

year = "2018",

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doi = "10.1016/j.jallcom.2018.08.076",

language = "English",

volume = "769",

pages = "1113--1120",

journal = "Journal of Alloys and Compounds",

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publisher = "Elsevier B.V.",

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T1 - Revisiting the conversion reaction in ultrafine SnO2 nanoparticles for exceptionally high-capacity Li-ion battery anodes

T2 - The synergetic effect of graphene and copper

AU - Kim, Da Sol

AU - Shim, Hyun Woo

AU - Dar, Mushtaq Ahmad

AU - Yoon, Hyunseok

AU - Song, Hee Jo

AU - Kim, Dong Wan

N1 - Funding Information: This work was supported by a Korea University Grant, by the R&D Center for Valuable Recycling(Global-Top R&BD Program) of the Ministry of Environment (Project No.: R2-17-2016002250005 ), and by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning ( NRF-2016R1A2B2012728 ). The authors extend their appreciation to the International Scientific Partnership Program ISPP at King Saud University for funding this research work through ISPP# 0076 ). Funding Information: This work was supported by a Korea University Grant, by the R&D Center for Valuable Recycling(Global-Top R&BD Program) of the Ministry of Environment (Project No.: R2-17-2016002250005), and by the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT and Future Planning (NRF-2016R1A2B2012728). The authors extend their appreciation to the International Scientific Partnership Program ISPP at King Saud University for funding this research work through ISPP# 0076).

PY - 2018/11/15

Y1 - 2018/11/15

N2 - Generally, in SnO2-based anode materials, the reversible alloying/dealloying reaction is the main Li-ion storage mechanism. Interestingly, these materials can show an exceptionally high capacity that is beyond the theoretical value (i.e., 783 mA h g−1 based on Sn + 4.4Li+ + 4.4e− ⇌ Li4.4Sn reaction), owing to the reversibility of the reaction between Sn and Li2O to form SnOx (x = 1, 2), so-called conversion reaction. Herein, we prepare Cu-reduced graphene oxide (rGO)-SnO2 nanocomposites as a model system in order to demonstrate an effective strategy to improve the reversibility of the conversion reaction in SnO2. The incorporation of rGO can prevent the aggregation of SnO2 nanoparticles. Furthermore, the Cu-rGO-SnO2 nanocomposite exhibits the most improved conversion reaction reversibility, resulting in improved cycling performance and high capacity. Ex-situ transmission electron microscopy analysis confirms the high reversibility of the conversion as well as the alloying/dealloying reactions. Also, Cu nanoparticles promote the decomposition of amorphous Li2O, leading to enhancement of the conversion reaction between Sn and Li2O. Therefore, these results demonstrate a strategy for significantly improving the electrochemical performances of SnO2-based anodes for Li-ion batteries.

AB - Generally, in SnO2-based anode materials, the reversible alloying/dealloying reaction is the main Li-ion storage mechanism. Interestingly, these materials can show an exceptionally high capacity that is beyond the theoretical value (i.e., 783 mA h g−1 based on Sn + 4.4Li+ + 4.4e− ⇌ Li4.4Sn reaction), owing to the reversibility of the reaction between Sn and Li2O to form SnOx (x = 1, 2), so-called conversion reaction. Herein, we prepare Cu-reduced graphene oxide (rGO)-SnO2 nanocomposites as a model system in order to demonstrate an effective strategy to improve the reversibility of the conversion reaction in SnO2. The incorporation of rGO can prevent the aggregation of SnO2 nanoparticles. Furthermore, the Cu-rGO-SnO2 nanocomposite exhibits the most improved conversion reaction reversibility, resulting in improved cycling performance and high capacity. Ex-situ transmission electron microscopy analysis confirms the high reversibility of the conversion as well as the alloying/dealloying reactions. Also, Cu nanoparticles promote the decomposition of amorphous Li2O, leading to enhancement of the conversion reaction between Sn and Li2O. Therefore, these results demonstrate a strategy for significantly improving the electrochemical performances of SnO2-based anodes for Li-ion batteries.

KW - Conversion reaction

KW - Cu

KW - Graphene

KW - Lithium-ion battery

KW - SnO

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