MBene promoted Zn peroxide chemistry in rechargeable near-neutral Zn-air batteries

Yue HOU; Ze CHEN; Xinliang LI; Yiqiao WANG; Pei LI; Huilin CUI; Rong ZHANG; Shuo YANG; Shaoce ZHANG; Chunyi ZHI

doi:10.1039/d3ee01297b

MBene promoted Zn peroxide chemistry in rechargeable near-neutral Zn-air batteries

Yue HOU, Ze CHEN, Xinliang LI, Yiqiao WANG, Pei LI, Huilin CUI, Rong ZHANG, Shuo YANG, Shaoce ZHANG, Chunyi ZHI^*

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

34 Citations (Scopus)

Abstract

Highly reversible Zn–air batteries (ZABs) in near-neutral aqueous electrolytes can suppress the formation of Zn dendrites and carbonates. However, near-neutral ZABs (NNZABs) based on Zn peroxide (ZnO₂) chemistry are challenging to build due to the air circulation requirement and the Swagelok structure. To achieve cost-effective NNZABs in a coin-cell configuration, it is essential to explore air-breathing cathodes with high catalytic activity for near-neutral systems. Previous studies focused on catalysts for alkaline ZABs, which are usually not suitable for near-neutral batteries. Here, Mo_4/3B_2−xT_z MBene with ordered vacancies is for the first time exploited as a high-performance catalyst for NNZABs. Interestingly, a stable lifecycle for 380 h under a current density of 2 mA cm⁻² and a 5 h cycling period was achieved, which is attributed to the high O₂-adsorbability and air stock capacity of Mo_4/3B_2−xT_z MBene. We also demonstrate that the vacancies at the Y sites of Mo_4/3B_2−xT_z MBene are active sites for boosting the sluggish kinetics of ZnO₂ chemistry. This work highlights the significance of introducing highly efficient cathode catalysts for NNZABs and the high efficiency of MBenes as catalysts in near-neutral systems.

Original language	English
Pages (from-to)	3407-3415
Number of pages	9
Journal	Energy and Environmental Science
Volume	16
Issue number	8
Early online date	8 Jun 2023
DOIs	https://doi.org/10.1039/d3ee01297b
Publication status	Published - 1 Aug 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 The Royal Society of Chemistry.

Funding

This research was supported by the National Key R&D Program of China under Project 2019YFA0705104 and Guangdong Basic and Applied Basic Research Foundation under Project 2022B1515120019.

UN SDGs

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

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10.1039/d3ee01297bLicence: CC BY

Cite this

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title = "MBene promoted Zn peroxide chemistry in rechargeable near-neutral Zn-air batteries",

abstract = "Highly reversible Zn–air batteries (ZABs) in near-neutral aqueous electrolytes can suppress the formation of Zn dendrites and carbonates. However, near-neutral ZABs (NNZABs) based on Zn peroxide (ZnO2) chemistry are challenging to build due to the air circulation requirement and the Swagelok structure. To achieve cost-effective NNZABs in a coin-cell configuration, it is essential to explore air-breathing cathodes with high catalytic activity for near-neutral systems. Previous studies focused on catalysts for alkaline ZABs, which are usually not suitable for near-neutral batteries. Here, Mo4/3B2−xTz MBene with ordered vacancies is for the first time exploited as a high-performance catalyst for NNZABs. Interestingly, a stable lifecycle for 380 h under a current density of 2 mA cm−2 and a 5 h cycling period was achieved, which is attributed to the high O2-adsorbability and air stock capacity of Mo4/3B2−xTz MBene. We also demonstrate that the vacancies at the Y sites of Mo4/3B2−xTz MBene are active sites for boosting the sluggish kinetics of ZnO2 chemistry. This work highlights the significance of introducing highly efficient cathode catalysts for NNZABs and the high efficiency of MBenes as catalysts in near-neutral systems.",

author = "Yue HOU and Ze CHEN and Xinliang LI and Yiqiao WANG and Pei LI and Huilin CUI and Rong ZHANG and Shuo YANG and Shaoce ZHANG and Chunyi ZHI",

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AU - HOU, Yue

AU - CHEN, Ze

AU - LI, Xinliang

AU - WANG, Yiqiao

AU - LI, Pei

AU - CUI, Huilin

AU - ZHANG, Rong

AU - YANG, Shuo

AU - ZHANG, Shaoce

AU - ZHI, Chunyi

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AB - Highly reversible Zn–air batteries (ZABs) in near-neutral aqueous electrolytes can suppress the formation of Zn dendrites and carbonates. However, near-neutral ZABs (NNZABs) based on Zn peroxide (ZnO2) chemistry are challenging to build due to the air circulation requirement and the Swagelok structure. To achieve cost-effective NNZABs in a coin-cell configuration, it is essential to explore air-breathing cathodes with high catalytic activity for near-neutral systems. Previous studies focused on catalysts for alkaline ZABs, which are usually not suitable for near-neutral batteries. Here, Mo4/3B2−xTz MBene with ordered vacancies is for the first time exploited as a high-performance catalyst for NNZABs. Interestingly, a stable lifecycle for 380 h under a current density of 2 mA cm−2 and a 5 h cycling period was achieved, which is attributed to the high O2-adsorbability and air stock capacity of Mo4/3B2−xTz MBene. We also demonstrate that the vacancies at the Y sites of Mo4/3B2−xTz MBene are active sites for boosting the sluggish kinetics of ZnO2 chemistry. This work highlights the significance of introducing highly efficient cathode catalysts for NNZABs and the high efficiency of MBenes as catalysts in near-neutral systems.

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MBene promoted Zn peroxide chemistry in rechargeable near-neutral Zn-air batteries

Abstract

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