Reduced Graphene Oxide decorated with Manganese Cobalt Oxide as Multifunctional Material for Mechanically Rechargeable and Hybrid Zinc-Air Batteries

Adnan Qaseem; Fuyi Chen; Chuanzhou Qiu; Abdelaziz Mahmoudi; Xiaoqiang Wu; Xiaolu Wang; Roy L. Johnston

doi:10.1002/ppsc.201700097

Reduced Graphene Oxide decorated with Manganese Cobalt Oxide as Multifunctional Material for Mechanically Rechargeable and Hybrid Zinc-Air Batteries

Adnan Qaseem, Fuyi Chen^*, Chuanzhou Qiu, Abdelaziz Mahmoudi, Xiaoqiang Wu, Xiaolu Wang, Roy L. Johnston

^*Corresponding author for this work

Chemistry

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

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Abstract

Spinel MnCo₂O₄ nanoparticles on nitrogen-doped reduced graphene oxide (MnCo₂O₄/NGr) are synthesized for advanced zinc-air batteries with remarkable cyclic efficiency and stability. The synthesized MnCo₂O₄/NGr exhibits good oxygen-reduction reaction (ORR) activity with half-wave potential E_1/2 of 0.85 V (vs reversible hydrogen electrode (RHE)), comparable to commercial Pt/C with E_1/2 of 0.88 V (vs RHE) along with superior oxygen electrode activity ΔE = 0.91 V for the ORR/OER (oxygen-evolution reaction) in alkaline media. Durability tests confirm that MnCo₂O₄/NGr is more stable than Pt/C in alkaline environment. MnCo₂O₄/NGr functions with stable discharge profile of 1.2 V at 20 mA cm^-2, large discharge capacity of 707 mAh g^-1 _Zn at 40 mA cm^-2 and a high energy density of 813 Wh kg^-1 _Zn in a mechanically rechargeable zinc-air battery. The electrically rechargeable MnCo₂O₄/NGr zinc-air battery displays hybrid behavior with both Faradaic and oxygen redox charge-discharge characteristics, operating at higher voltage and providing higher power density and excellent cyclic efficiency of 86% for over 100 cycles compared to Pt/C with efficiency of around 60%. Moreover, hybrid zinc-air battery operates with a stable and energy efficient profile at different current densities.

Original language	English
Article number	1700097
Number of pages	14
Journal	Particle & Particle Systems Characterization
Early online date	30 Jun 2017
DOIs	https://doi.org/10.1002/ppsc.201700097
Publication status	E-pub ahead of print - 30 Jun 2017

Keywords

Bifunctional catalysts
Energy conversion and storage
Hybrid zinc-air batteries
Hydrothermal synthesis
Primary zinc-air batteries

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1002/ppsc.201700097Licence: None: All rights reserved

Manganese Cobalt Oxide Decorated Reduced Graphene Oxide
This is the peer reviewed version of the following article: A. Qaseem, F. Chen, C. Qiu, A. Mahmoudi, X. Wu, X. Wang, R. L. Johnston, Part. Part. Syst. Charact. 2017, 1700097. https://doi.org/10.1002/ppsc.201700097, which has been published in final form at 10.1002/ppsc.201700097. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Accepted author manuscript, 1.72 MBLicence: Other (please specify with Rights Statement)

Cite this

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title = "Reduced Graphene Oxide decorated with Manganese Cobalt Oxide as Multifunctional Material for Mechanically Rechargeable and Hybrid Zinc-Air Batteries",

abstract = "Spinel MnCo2O4 nanoparticles on nitrogen-doped reduced graphene oxide (MnCo2O4/NGr) are synthesized for advanced zinc-air batteries with remarkable cyclic efficiency and stability. The synthesized MnCo2O4/NGr exhibits good oxygen-reduction reaction (ORR) activity with half-wave potential E1/2 of 0.85 V (vs reversible hydrogen electrode (RHE)), comparable to commercial Pt/C with E1/2 of 0.88 V (vs RHE) along with superior oxygen electrode activity ΔE = 0.91 V for the ORR/OER (oxygen-evolution reaction) in alkaline media. Durability tests confirm that MnCo2O4/NGr is more stable than Pt/C in alkaline environment. MnCo2O4/NGr functions with stable discharge profile of 1.2 V at 20 mA cm-2, large discharge capacity of 707 mAh g-1 Zn at 40 mA cm-2 and a high energy density of 813 Wh kg-1 Zn in a mechanically rechargeable zinc-air battery. The electrically rechargeable MnCo2O4/NGr zinc-air battery displays hybrid behavior with both Faradaic and oxygen redox charge-discharge characteristics, operating at higher voltage and providing higher power density and excellent cyclic efficiency of 86% for over 100 cycles compared to Pt/C with efficiency of around 60%. Moreover, hybrid zinc-air battery operates with a stable and energy efficient profile at different current densities.",

keywords = "Bifunctional catalysts, Energy conversion and storage, Hybrid zinc-air batteries, Hydrothermal synthesis, Primary zinc-air batteries",

author = "Adnan Qaseem and Fuyi Chen and Chuanzhou Qiu and Abdelaziz Mahmoudi and Xiaoqiang Wu and Xiaolu Wang and Johnston, {Roy L.}",

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AU - Qaseem, Adnan

AU - Chen, Fuyi

AU - Qiu, Chuanzhou

AU - Mahmoudi, Abdelaziz

AU - Wu, Xiaoqiang

AU - Wang, Xiaolu

AU - Johnston, Roy L.

PY - 2017/6/30

Y1 - 2017/6/30

N2 - Spinel MnCo2O4 nanoparticles on nitrogen-doped reduced graphene oxide (MnCo2O4/NGr) are synthesized for advanced zinc-air batteries with remarkable cyclic efficiency and stability. The synthesized MnCo2O4/NGr exhibits good oxygen-reduction reaction (ORR) activity with half-wave potential E1/2 of 0.85 V (vs reversible hydrogen electrode (RHE)), comparable to commercial Pt/C with E1/2 of 0.88 V (vs RHE) along with superior oxygen electrode activity ΔE = 0.91 V for the ORR/OER (oxygen-evolution reaction) in alkaline media. Durability tests confirm that MnCo2O4/NGr is more stable than Pt/C in alkaline environment. MnCo2O4/NGr functions with stable discharge profile of 1.2 V at 20 mA cm-2, large discharge capacity of 707 mAh g-1 Zn at 40 mA cm-2 and a high energy density of 813 Wh kg-1 Zn in a mechanically rechargeable zinc-air battery. The electrically rechargeable MnCo2O4/NGr zinc-air battery displays hybrid behavior with both Faradaic and oxygen redox charge-discharge characteristics, operating at higher voltage and providing higher power density and excellent cyclic efficiency of 86% for over 100 cycles compared to Pt/C with efficiency of around 60%. Moreover, hybrid zinc-air battery operates with a stable and energy efficient profile at different current densities.

AB - Spinel MnCo2O4 nanoparticles on nitrogen-doped reduced graphene oxide (MnCo2O4/NGr) are synthesized for advanced zinc-air batteries with remarkable cyclic efficiency and stability. The synthesized MnCo2O4/NGr exhibits good oxygen-reduction reaction (ORR) activity with half-wave potential E1/2 of 0.85 V (vs reversible hydrogen electrode (RHE)), comparable to commercial Pt/C with E1/2 of 0.88 V (vs RHE) along with superior oxygen electrode activity ΔE = 0.91 V for the ORR/OER (oxygen-evolution reaction) in alkaline media. Durability tests confirm that MnCo2O4/NGr is more stable than Pt/C in alkaline environment. MnCo2O4/NGr functions with stable discharge profile of 1.2 V at 20 mA cm-2, large discharge capacity of 707 mAh g-1 Zn at 40 mA cm-2 and a high energy density of 813 Wh kg-1 Zn in a mechanically rechargeable zinc-air battery. The electrically rechargeable MnCo2O4/NGr zinc-air battery displays hybrid behavior with both Faradaic and oxygen redox charge-discharge characteristics, operating at higher voltage and providing higher power density and excellent cyclic efficiency of 86% for over 100 cycles compared to Pt/C with efficiency of around 60%. Moreover, hybrid zinc-air battery operates with a stable and energy efficient profile at different current densities.

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KW - Energy conversion and storage

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KW - Hydrothermal synthesis

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Reduced Graphene Oxide decorated with Manganese Cobalt Oxide as Multifunctional Material for Mechanically Rechargeable and Hybrid Zinc-Air Batteries

Abstract

Keywords

ASJC Scopus subject areas

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