Synthesis of α-MnO2 Nanowires via Facile Hydrothermal Method and Their Application in Li-O2 Battery

Chang Jian Lu; Fa Quan Zhu; Ji Guang Yin; Jian Bo Zhang; Ya Wei Yu; Xiu Lan Hu

doi:10.15541/jim20180093

Synthesis of α-MnO₂ Nanowires via Facile Hydrothermal Method and Their Application in Li-O₂ Battery

Chang Jian Lu, Fa Quan Zhu, Ji Guang Yin, Jian Bo Zhang, Ya Wei Yu, Xiu Lan Hu

College of Materials Science and Engineering

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

6 Scopus citations

Abstract

Li-O₂ batteries are regarded as a promising energy storage system for their extremely high energy density. MnO₂-based materials are recognized as efficient and low-cost catalyst for a Li-O₂ battery positive electrode material. In this work, α-MnO₂ nanowires were successfully synthesized by a hydrothermal method and their electrocatalytic performance were investigated in Li-O₂ batteries. X-ray diffraction and field emission scanning electron microscope confirms the formation of α-MnO₂. The Li-O₂ battery which consists of α-MnO₂ nanowires shows a high discharge capacity up to 12000 mAh∙g^-1 at a restrict voltage of 2.0 V with the current density of 100 mA∙g^-1. When restricting the discharge capacity at 500 mAh∙g^-1, it can operate over 40 cycles and exhibit good cycle stability. These results in¬dicate that the α-MnO₂ nanowires can be used as positive electrode catalysts for Li-O₂ batteries.

Translated title of the contribution	α-MnO₂纳米线的制备及其在锂氧气电池中的应用
Original language	English
Pages (from-to)	1029-1034
Number of pages	6
Journal	Wuji Cailiao Xuebao/Journal of Inorganic Materials
Volume	33
Issue number	9
DOIs	https://doi.org/10.15541/jim20180093
State	Published - 1 Sep 2018

Keywords

Discharge capacity
Ketjen Black
Li-O battery
Positive electrode
Α-MnO nanowires

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title = "Synthesis of α-MnO2 Nanowires via Facile Hydrothermal Method and Their Application in Li-O2 Battery",

abstract = "Li-O2 batteries are regarded as a promising energy storage system for their extremely high energy density. MnO2-based materials are recognized as efficient and low-cost catalyst for a Li-O2 battery positive electrode material. In this work, α-MnO2 nanowires were successfully synthesized by a hydrothermal method and their electrocatalytic performance were investigated in Li-O2 batteries. X-ray diffraction and field emission scanning electron microscope confirms the formation of α-MnO2. The Li-O2 battery which consists of α-MnO2 nanowires shows a high discharge capacity up to 12000 mAh∙g-1 at a restrict voltage of 2.0 V with the current density of 100 mA∙g-1. When restricting the discharge capacity at 500 mAh∙g-1, it can operate over 40 cycles and exhibit good cycle stability. These results in¬dicate that the α-MnO2 nanowires can be used as positive electrode catalysts for Li-O2 batteries.",

keywords = "Discharge capacity, Ketjen Black, Li-O battery, Positive electrode, Α-MnO nanowires",

author = "Lu, {Chang Jian} and Zhu, {Fa Quan} and Yin, {Ji Guang} and Zhang, {Jian Bo} and Yu, {Ya Wei} and Hu, {Xiu Lan}",

year = "2018",

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T1 - Synthesis of α-MnO2 Nanowires via Facile Hydrothermal Method and Their Application in Li-O2 Battery

AU - Lu, Chang Jian

AU - Zhu, Fa Quan

AU - Yin, Ji Guang

AU - Zhang, Jian Bo

AU - Yu, Ya Wei

AU - Hu, Xiu Lan

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Li-O2 batteries are regarded as a promising energy storage system for their extremely high energy density. MnO2-based materials are recognized as efficient and low-cost catalyst for a Li-O2 battery positive electrode material. In this work, α-MnO2 nanowires were successfully synthesized by a hydrothermal method and their electrocatalytic performance were investigated in Li-O2 batteries. X-ray diffraction and field emission scanning electron microscope confirms the formation of α-MnO2. The Li-O2 battery which consists of α-MnO2 nanowires shows a high discharge capacity up to 12000 mAh∙g-1 at a restrict voltage of 2.0 V with the current density of 100 mA∙g-1. When restricting the discharge capacity at 500 mAh∙g-1, it can operate over 40 cycles and exhibit good cycle stability. These results in¬dicate that the α-MnO2 nanowires can be used as positive electrode catalysts for Li-O2 batteries.

AB - Li-O2 batteries are regarded as a promising energy storage system for their extremely high energy density. MnO2-based materials are recognized as efficient and low-cost catalyst for a Li-O2 battery positive electrode material. In this work, α-MnO2 nanowires were successfully synthesized by a hydrothermal method and their electrocatalytic performance were investigated in Li-O2 batteries. X-ray diffraction and field emission scanning electron microscope confirms the formation of α-MnO2. The Li-O2 battery which consists of α-MnO2 nanowires shows a high discharge capacity up to 12000 mAh∙g-1 at a restrict voltage of 2.0 V with the current density of 100 mA∙g-1. When restricting the discharge capacity at 500 mAh∙g-1, it can operate over 40 cycles and exhibit good cycle stability. These results in¬dicate that the α-MnO2 nanowires can be used as positive electrode catalysts for Li-O2 batteries.

KW - Discharge capacity

KW - Ketjen Black

KW - Li-O battery

KW - Positive electrode

KW - Α-MnO nanowires

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Synthesis of α-MnO₂ Nanowires via Facile Hydrothermal Method and Their Application in Li-O₂ Battery

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