Synergistic Effect of CuGeO3/Graphene Composites for Efficient Oxygen–Electrode Electrocatalysts in Li–O2 Batteries

Gwang Hee Lee; Myung Chang Sung; Jae Chan Kim; Hee Jo Song; Dong Wan Kim

doi:10.1002/aenm.201801930

Synergistic Effect of CuGeO₃/Graphene Composites for Efficient Oxygen–Electrode Electrocatalysts in Li–O₂ Batteries

Gwang Hee Lee, Myung Chang Sung, Jae Chan Kim, Hee Jo Song, Dong Wan Kim

School of Civil, Environmental and Architectural Engineering

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

28 Citations (Scopus)

Abstract

Hybridized 1D/2D CuGeO₃/graphene composites are applied as the oxygen–electrode electrocatalysts for Li–O₂ batteries. The CuGeO₃/graphene composites are synthesized by the crystallographic alignment of CuGeO₃ nanowires on graphene, rendering strong heteroepitaxial coupling between the 1D oxide nanostructures and the 2D electrically conducting graphene. The inherited excellent electrocatalytic activity of the CuGeO₃/graphene composites leads to lower overpotentials and more stable cycling performance of Li–O₂ cells than CuGeO₃ nanowires and graphene. The relationships between CuGeO₃ nanowires and graphene are studied for the oxygen reduction and oxygen evolution activity in both aqueous and nonaqueous solutions, and the electrocatalytic activity is improved by manipulating the redox pair and sp3/sp2 via surface chemical modification.

Original language	English
Article number	1801930
Journal	Advanced Energy Materials
Volume	8
Issue number	36
DOIs	https://doi.org/10.1002/aenm.201801930
Publication status	Published - 2018 Dec 27

Keywords

CuGeO
Li–O batteries
bifunctional phase boundary
graphene
synergistic effect

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Materials Science(all)

UN SDGs

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

Access to Document

10.1002/aenm.201801930

Cite this

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title = "Synergistic Effect of CuGeO3/Graphene Composites for Efficient Oxygen–Electrode Electrocatalysts in Li–O2 Batteries",

abstract = "Hybridized 1D/2D CuGeO3/graphene composites are applied as the oxygen–electrode electrocatalysts for Li–O2 batteries. The CuGeO3/graphene composites are synthesized by the crystallographic alignment of CuGeO3 nanowires on graphene, rendering strong heteroepitaxial coupling between the 1D oxide nanostructures and the 2D electrically conducting graphene. The inherited excellent electrocatalytic activity of the CuGeO3/graphene composites leads to lower overpotentials and more stable cycling performance of Li–O2 cells than CuGeO3 nanowires and graphene. The relationships between CuGeO3 nanowires and graphene are studied for the oxygen reduction and oxygen evolution activity in both aqueous and nonaqueous solutions, and the electrocatalytic activity is improved by manipulating the redox pair and sp3/sp2 via surface chemical modification.",

keywords = "CuGeO, Li–O batteries, bifunctional phase boundary, graphene, synergistic effect",

author = "Lee, {Gwang Hee} and Sung, {Myung Chang} and Kim, {Jae Chan} and Song, {Hee Jo} and Kim, {Dong Wan}",

note = "Funding Information: This work was supported by a Korea University Grant and the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning [Grant Nos. NRF-2018M3D1A1058744, NRF-2017R1C1B2004869, NRF-2016M3A7B4909318, and NRF-2016R1A2B2012728]. Funding Information: This work was supported by a Korea University Grant and the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning [Grant Nos. NRF-2018M3D1A1058744, NRF-2017R1C1B2004869, NRF-2016M3A7B4909318, and NRF- 2016R1A2B2012728].",

year = "2018",

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doi = "10.1002/aenm.201801930",

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T1 - Synergistic Effect of CuGeO3/Graphene Composites for Efficient Oxygen–Electrode Electrocatalysts in Li–O2 Batteries

AU - Lee, Gwang Hee

AU - Sung, Myung Chang

AU - Kim, Jae Chan

AU - Song, Hee Jo

AU - Kim, Dong Wan

N1 - Funding Information: This work was supported by a Korea University Grant and the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning [Grant Nos. NRF-2018M3D1A1058744, NRF-2017R1C1B2004869, NRF-2016M3A7B4909318, and NRF-2016R1A2B2012728]. Funding Information: This work was supported by a Korea University Grant and the National Research Foundation of Korea (NRF) Grant funded by the Ministry of Science, ICT, and Future Planning [Grant Nos. NRF-2018M3D1A1058744, NRF-2017R1C1B2004869, NRF-2016M3A7B4909318, and NRF- 2016R1A2B2012728].

PY - 2018/12/27

Y1 - 2018/12/27

N2 - Hybridized 1D/2D CuGeO3/graphene composites are applied as the oxygen–electrode electrocatalysts for Li–O2 batteries. The CuGeO3/graphene composites are synthesized by the crystallographic alignment of CuGeO3 nanowires on graphene, rendering strong heteroepitaxial coupling between the 1D oxide nanostructures and the 2D electrically conducting graphene. The inherited excellent electrocatalytic activity of the CuGeO3/graphene composites leads to lower overpotentials and more stable cycling performance of Li–O2 cells than CuGeO3 nanowires and graphene. The relationships between CuGeO3 nanowires and graphene are studied for the oxygen reduction and oxygen evolution activity in both aqueous and nonaqueous solutions, and the electrocatalytic activity is improved by manipulating the redox pair and sp3/sp2 via surface chemical modification.

AB - Hybridized 1D/2D CuGeO3/graphene composites are applied as the oxygen–electrode electrocatalysts for Li–O2 batteries. The CuGeO3/graphene composites are synthesized by the crystallographic alignment of CuGeO3 nanowires on graphene, rendering strong heteroepitaxial coupling between the 1D oxide nanostructures and the 2D electrically conducting graphene. The inherited excellent electrocatalytic activity of the CuGeO3/graphene composites leads to lower overpotentials and more stable cycling performance of Li–O2 cells than CuGeO3 nanowires and graphene. The relationships between CuGeO3 nanowires and graphene are studied for the oxygen reduction and oxygen evolution activity in both aqueous and nonaqueous solutions, and the electrocatalytic activity is improved by manipulating the redox pair and sp3/sp2 via surface chemical modification.

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KW - synergistic effect

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