An effective three-dimensional ordered mesoporous ZnCo2O4 as electrocatalyst for Li-O2 batteries

Pengfa Li; Wang Sun; Qilin Yu; Mengjie Guan; Jinshuo Qiao; Zhenhua Wang; David Rooney; Kening Sun

doi:10.1016/j.matlet.2015.06.006

An effective three-dimensional ordered mesoporous ZnCo₂O₄ as electrocatalyst for Li-O₂ batteries

Pengfa Li, Wang Sun^*, Qilin Yu, Mengjie Guan, Jinshuo Qiao, Zhenhua Wang, David Rooney, Kening Sun

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

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

27 Citations (Scopus)

Abstract

Three-dimensional ordered mesoporous (3DOM) ZnCo₂O₄ materials have been synthesized via a hard template and used as bifunctional electrocatalysts for rechargeable Li-O₂ batteries. The as-prepared ZnCo₂O₄ nanoparticles possess a high specific surface area of 127.2 m² g^-1 and a spinel crystalline structure. The Li-O₂ battery utilizing 3DOM ZnCo₂O₄ shows a higher specific capacity of 6024 mAh g^-1 than that with pure Ketjen black (KB). Moreover, the ZnCo₂O₄-based electrode enables much enhanced cyclability with a smaller discharge-recharge voltage gap than that of the carbon-only cathode. Such excellent catalytic performance of ZnCo₂O₄ could be associated with its larger surface area and 3D ordered mesoporous structure.

Original language	English
Pages (from-to)	84-87
Number of pages	4
Journal	Materials Letters
Volume	158
DOIs	https://doi.org/10.1016/j.matlet.2015.06.006
Publication status	Published - 10 Jun 2015

Keywords

Electrocatalyst
Lithium-oxygen battery
Metallic composites
Structural

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title = "An effective three-dimensional ordered mesoporous ZnCo2O4 as electrocatalyst for Li-O2 batteries",

abstract = "Three-dimensional ordered mesoporous (3DOM) ZnCo2O4 materials have been synthesized via a hard template and used as bifunctional electrocatalysts for rechargeable Li-O2 batteries. The as-prepared ZnCo2O4 nanoparticles possess a high specific surface area of 127.2 m2 g-1 and a spinel crystalline structure. The Li-O2 battery utilizing 3DOM ZnCo2O4 shows a higher specific capacity of 6024 mAh g-1 than that with pure Ketjen black (KB). Moreover, the ZnCo2O4-based electrode enables much enhanced cyclability with a smaller discharge-recharge voltage gap than that of the carbon-only cathode. Such excellent catalytic performance of ZnCo2O4 could be associated with its larger surface area and 3D ordered mesoporous structure.",

keywords = "Electrocatalyst, Lithium-oxygen battery, Metallic composites, Structural",

author = "Pengfa Li and Wang Sun and Qilin Yu and Mengjie Guan and Jinshuo Qiao and Zhenhua Wang and David Rooney and Kening Sun",

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AU - Li, Pengfa

AU - Sun, Wang

AU - Yu, Qilin

AU - Guan, Mengjie

AU - Qiao, Jinshuo

AU - Wang, Zhenhua

AU - Rooney, David

AU - Sun, Kening

PY - 2015/6/10

Y1 - 2015/6/10

N2 - Three-dimensional ordered mesoporous (3DOM) ZnCo2O4 materials have been synthesized via a hard template and used as bifunctional electrocatalysts for rechargeable Li-O2 batteries. The as-prepared ZnCo2O4 nanoparticles possess a high specific surface area of 127.2 m2 g-1 and a spinel crystalline structure. The Li-O2 battery utilizing 3DOM ZnCo2O4 shows a higher specific capacity of 6024 mAh g-1 than that with pure Ketjen black (KB). Moreover, the ZnCo2O4-based electrode enables much enhanced cyclability with a smaller discharge-recharge voltage gap than that of the carbon-only cathode. Such excellent catalytic performance of ZnCo2O4 could be associated with its larger surface area and 3D ordered mesoporous structure.

AB - Three-dimensional ordered mesoporous (3DOM) ZnCo2O4 materials have been synthesized via a hard template and used as bifunctional electrocatalysts for rechargeable Li-O2 batteries. The as-prepared ZnCo2O4 nanoparticles possess a high specific surface area of 127.2 m2 g-1 and a spinel crystalline structure. The Li-O2 battery utilizing 3DOM ZnCo2O4 shows a higher specific capacity of 6024 mAh g-1 than that with pure Ketjen black (KB). Moreover, the ZnCo2O4-based electrode enables much enhanced cyclability with a smaller discharge-recharge voltage gap than that of the carbon-only cathode. Such excellent catalytic performance of ZnCo2O4 could be associated with its larger surface area and 3D ordered mesoporous structure.

KW - Electrocatalyst

KW - Lithium-oxygen battery

KW - Metallic composites

KW - Structural

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SP - 84

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JO - Materials Letters

JF - Materials Letters

ER -

An effective three-dimensional ordered mesoporous ZnCo₂O₄ as electrocatalyst for Li-O₂ batteries

Abstract

Keywords

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