Efficient and Durable Bifunctional Oxygen Catalysts Based on NiFeO@MnOx Core-Shell Structures for Rechargeable Zn-Air Batteries

Yi Cheng, Shuo Dou, Jean Pierre Veder, Shuangyin Wang, Martin Saunders, San Ping Jiang

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Rechargeable Zn-air battery is limited by the sluggish kinetics and poor durability of the oxygen catalysts. In this Research Article, a new bifunctional oxygen catalyst has been developed through embedding the ultrafine NiFeO nanoparticles (NPs) in a porous amorphous MnOx layer, in which the NiFeO-core contributes to the high activity for the oxygen evolution reaction (OER) and the amorphous MnOx-shell functions as active phase for the oxygen reduction reaction (ORR), promoted by the synergistic effect between the NiFeO core and MnOx shell. The synergistic effect is related to the electron drawing of NiFeO core from MnOx shell, which decreases the affinity and adsorption energy of oxygen on MnOx shell and significantly increases the kinetics of ORR. The electrocatalytic activity and durability of NiFeO@MnOx depends strongly on the NiFeO:MnOx ratio. NiFeO@MnOx with NiFeO:MnOx weight ratio of 1:0.8 shows the best performance for reversible ORR and OER, with a potential gap (ΔE) of 0.792 V to achieve a current density of 3 mA cm-2 for ORR (EORR=3) and 5 mA cm-2 for OER (EOER=5) in 0.1 M KOH solution. The high activity of the NiFeO@MnOx(1:0.8) has been demonstrated in a Zn-air battery. Zn-air battery fabricated using the NiFeO@MnOx(1:0.8) oxygen electrode shows similar initial performance with that of Pt-Ir/C oxygen electrode but a much better durability under charge and discharge cycles as the result of the structure confinement effect of amorphous MnOx. The results demonstrate NiFeO@MnOx as an effective bifunctional oxygen catalysts for rechargeable metal-air batteries.

Original languageEnglish
Pages (from-to)8121-8133
Number of pages13
JournalACS Applied Materials and Interfaces
Volume9
Issue number9
Early online date16 Feb 2017
DOIs
Publication statusPublished - 8 Mar 2017

Fingerprint

Oxygen
Catalysts
Air
Durability
Electrodes
Kinetics
Current density
Metals
Nanoparticles
Adsorption
Electrons

Cite this

Cheng, Yi ; Dou, Shuo ; Veder, Jean Pierre ; Wang, Shuangyin ; Saunders, Martin ; Jiang, San Ping. / Efficient and Durable Bifunctional Oxygen Catalysts Based on NiFeO@MnOx Core-Shell Structures for Rechargeable Zn-Air Batteries. In: ACS Applied Materials and Interfaces. 2017 ; Vol. 9, No. 9. pp. 8121-8133.
@article{7dc7d643a8a5408da8eb1297efd62c6c,
title = "Efficient and Durable Bifunctional Oxygen Catalysts Based on NiFeO@MnOx Core-Shell Structures for Rechargeable Zn-Air Batteries",
abstract = "Rechargeable Zn-air battery is limited by the sluggish kinetics and poor durability of the oxygen catalysts. In this Research Article, a new bifunctional oxygen catalyst has been developed through embedding the ultrafine NiFeO nanoparticles (NPs) in a porous amorphous MnOx layer, in which the NiFeO-core contributes to the high activity for the oxygen evolution reaction (OER) and the amorphous MnOx-shell functions as active phase for the oxygen reduction reaction (ORR), promoted by the synergistic effect between the NiFeO core and MnOx shell. The synergistic effect is related to the electron drawing of NiFeO core from MnOx shell, which decreases the affinity and adsorption energy of oxygen on MnOx shell and significantly increases the kinetics of ORR. The electrocatalytic activity and durability of NiFeO@MnOx depends strongly on the NiFeO:MnOx ratio. NiFeO@MnOx with NiFeO:MnOx weight ratio of 1:0.8 shows the best performance for reversible ORR and OER, with a potential gap (ΔE) of 0.792 V to achieve a current density of 3 mA cm-2 for ORR (EORR=3) and 5 mA cm-2 for OER (EOER=5) in 0.1 M KOH solution. The high activity of the NiFeO@MnOx(1:0.8) has been demonstrated in a Zn-air battery. Zn-air battery fabricated using the NiFeO@MnOx(1:0.8) oxygen electrode shows similar initial performance with that of Pt-Ir/C oxygen electrode but a much better durability under charge and discharge cycles as the result of the structure confinement effect of amorphous MnOx. The results demonstrate NiFeO@MnOx as an effective bifunctional oxygen catalysts for rechargeable metal-air batteries.",
keywords = "bifunctional oxygen catalysts, NiFeO@MnO core−shell catalysts, rechargeable Zn−air batteries, structure confinement, synergistic effect",
author = "Yi Cheng and Shuo Dou and Veder, {Jean Pierre} and Shuangyin Wang and Martin Saunders and Jiang, {San Ping}",
year = "2017",
month = "3",
day = "8",
doi = "10.1021/acsami.6b16180",
language = "English",
volume = "9",
pages = "8121--8133",
journal = "Applied Materials and Interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "9",

}

Efficient and Durable Bifunctional Oxygen Catalysts Based on NiFeO@MnOx Core-Shell Structures for Rechargeable Zn-Air Batteries. / Cheng, Yi; Dou, Shuo; Veder, Jean Pierre; Wang, Shuangyin; Saunders, Martin; Jiang, San Ping.

In: ACS Applied Materials and Interfaces, Vol. 9, No. 9, 08.03.2017, p. 8121-8133.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Efficient and Durable Bifunctional Oxygen Catalysts Based on NiFeO@MnOx Core-Shell Structures for Rechargeable Zn-Air Batteries

AU - Cheng, Yi

AU - Dou, Shuo

AU - Veder, Jean Pierre

AU - Wang, Shuangyin

AU - Saunders, Martin

AU - Jiang, San Ping

PY - 2017/3/8

Y1 - 2017/3/8

N2 - Rechargeable Zn-air battery is limited by the sluggish kinetics and poor durability of the oxygen catalysts. In this Research Article, a new bifunctional oxygen catalyst has been developed through embedding the ultrafine NiFeO nanoparticles (NPs) in a porous amorphous MnOx layer, in which the NiFeO-core contributes to the high activity for the oxygen evolution reaction (OER) and the amorphous MnOx-shell functions as active phase for the oxygen reduction reaction (ORR), promoted by the synergistic effect between the NiFeO core and MnOx shell. The synergistic effect is related to the electron drawing of NiFeO core from MnOx shell, which decreases the affinity and adsorption energy of oxygen on MnOx shell and significantly increases the kinetics of ORR. The electrocatalytic activity and durability of NiFeO@MnOx depends strongly on the NiFeO:MnOx ratio. NiFeO@MnOx with NiFeO:MnOx weight ratio of 1:0.8 shows the best performance for reversible ORR and OER, with a potential gap (ΔE) of 0.792 V to achieve a current density of 3 mA cm-2 for ORR (EORR=3) and 5 mA cm-2 for OER (EOER=5) in 0.1 M KOH solution. The high activity of the NiFeO@MnOx(1:0.8) has been demonstrated in a Zn-air battery. Zn-air battery fabricated using the NiFeO@MnOx(1:0.8) oxygen electrode shows similar initial performance with that of Pt-Ir/C oxygen electrode but a much better durability under charge and discharge cycles as the result of the structure confinement effect of amorphous MnOx. The results demonstrate NiFeO@MnOx as an effective bifunctional oxygen catalysts for rechargeable metal-air batteries.

AB - Rechargeable Zn-air battery is limited by the sluggish kinetics and poor durability of the oxygen catalysts. In this Research Article, a new bifunctional oxygen catalyst has been developed through embedding the ultrafine NiFeO nanoparticles (NPs) in a porous amorphous MnOx layer, in which the NiFeO-core contributes to the high activity for the oxygen evolution reaction (OER) and the amorphous MnOx-shell functions as active phase for the oxygen reduction reaction (ORR), promoted by the synergistic effect between the NiFeO core and MnOx shell. The synergistic effect is related to the electron drawing of NiFeO core from MnOx shell, which decreases the affinity and adsorption energy of oxygen on MnOx shell and significantly increases the kinetics of ORR. The electrocatalytic activity and durability of NiFeO@MnOx depends strongly on the NiFeO:MnOx ratio. NiFeO@MnOx with NiFeO:MnOx weight ratio of 1:0.8 shows the best performance for reversible ORR and OER, with a potential gap (ΔE) of 0.792 V to achieve a current density of 3 mA cm-2 for ORR (EORR=3) and 5 mA cm-2 for OER (EOER=5) in 0.1 M KOH solution. The high activity of the NiFeO@MnOx(1:0.8) has been demonstrated in a Zn-air battery. Zn-air battery fabricated using the NiFeO@MnOx(1:0.8) oxygen electrode shows similar initial performance with that of Pt-Ir/C oxygen electrode but a much better durability under charge and discharge cycles as the result of the structure confinement effect of amorphous MnOx. The results demonstrate NiFeO@MnOx as an effective bifunctional oxygen catalysts for rechargeable metal-air batteries.

KW - bifunctional oxygen catalysts

KW - NiFeO@MnO core−shell catalysts

KW - rechargeable Zn−air batteries

KW - structure confinement

KW - synergistic effect

UR - http://www.scopus.com/inward/record.url?scp=85014808078&partnerID=8YFLogxK

U2 - 10.1021/acsami.6b16180

DO - 10.1021/acsami.6b16180

M3 - Article

VL - 9

SP - 8121

EP - 8133

JO - Applied Materials and Interfaces

JF - Applied Materials and Interfaces

SN - 1944-8244

IS - 9

ER -