A Na3V2(PO4)2O1.6F1.4 Cathode of Zn-Ion Battery Enabled by a Water-in-Bisalt Electrolyte

Qiao Ni; Heng Jiang; Sean Sandstrom; Ying Bai; Haixia Ren; Xianyong Wu; Qiubo Guo; Dongxu Yu; Chuan Wu; Xiulei Ji

doi:10.1002/adfm.202003511

A Na₃V₂(PO₄)₂O_1.6F_1.4 Cathode of Zn-Ion Battery Enabled by a Water-in-Bisalt Electrolyte

Qiao Ni, Heng Jiang, Sean Sandstrom, Ying Bai^*, Haixia Ren, Xianyong Wu, Qiubo Guo, Dongxu Yu, Chuan Wu^*, Xiulei Ji^*

^*Corresponding author for this work

School of Material Science and Engineering

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

122 Citations (Scopus)

Abstract

Aqueous zinc-ion batteries are receiving increasing attention; however, the development of high-voltage cathodes is limited by the narrow voltage window of conventional aqueous electrolytes. Herein, it is reported that Na₃V₂(PO₄)₂O_1.6F_1.4 exhibits the excellent performance, optimal to date, among polyanion cathode materials in a novel neutral water-in-bisalts electrolyte of 25 m ZnCl₂ + 5 m NH₄Cl. It delivers a reversible capacity of 155 mAh g⁻¹ at 50 mA g⁻¹, a high average operating potential of ≈1.46 V, and stable cyclability of 7000 cycles at 2 A g⁻¹.

Original language	English
Article number	2003511
Journal	Advanced Functional Materials
Volume	30
Issue number	36
DOIs	https://doi.org/10.1002/adfm.202003511
Publication status	Published - 1 Sept 2020

Keywords

NaV(PO)OF
aqueous batteries
polyanion-type compounds
water-in-bisalts electrolytes
zinc-ion batteries

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10.1002/adfm.202003511

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title = "A Na3V2(PO4)2O1.6F1.4 Cathode of Zn-Ion Battery Enabled by a Water-in-Bisalt Electrolyte",

abstract = "Aqueous zinc-ion batteries are receiving increasing attention; however, the development of high-voltage cathodes is limited by the narrow voltage window of conventional aqueous electrolytes. Herein, it is reported that Na3V2(PO4)2O1.6F1.4 exhibits the excellent performance, optimal to date, among polyanion cathode materials in a novel neutral water-in-bisalts electrolyte of 25 m ZnCl2 + 5 m NH4Cl. It delivers a reversible capacity of 155 mAh g−1 at 50 mA g−1, a high average operating potential of ≈1.46 V, and stable cyclability of 7000 cycles at 2 A g−1.",

keywords = "NaV(PO)OF, aqueous batteries, polyanion-type compounds, water-in-bisalts electrolytes, zinc-ion batteries",

author = "Qiao Ni and Heng Jiang and Sean Sandstrom and Ying Bai and Haixia Ren and Xianyong Wu and Qiubo Guo and Dongxu Yu and Chuan Wu and Xiulei Ji",

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doi = "10.1002/adfm.202003511",

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AU - Ni, Qiao

AU - Jiang, Heng

AU - Sandstrom, Sean

AU - Bai, Ying

AU - Ren, Haixia

AU - Wu, Xianyong

AU - Guo, Qiubo

AU - Yu, Dongxu

AU - Wu, Chuan

AU - Ji, Xiulei

PY - 2020/9/1

Y1 - 2020/9/1

N2 - Aqueous zinc-ion batteries are receiving increasing attention; however, the development of high-voltage cathodes is limited by the narrow voltage window of conventional aqueous electrolytes. Herein, it is reported that Na3V2(PO4)2O1.6F1.4 exhibits the excellent performance, optimal to date, among polyanion cathode materials in a novel neutral water-in-bisalts electrolyte of 25 m ZnCl2 + 5 m NH4Cl. It delivers a reversible capacity of 155 mAh g−1 at 50 mA g−1, a high average operating potential of ≈1.46 V, and stable cyclability of 7000 cycles at 2 A g−1.

AB - Aqueous zinc-ion batteries are receiving increasing attention; however, the development of high-voltage cathodes is limited by the narrow voltage window of conventional aqueous electrolytes. Herein, it is reported that Na3V2(PO4)2O1.6F1.4 exhibits the excellent performance, optimal to date, among polyanion cathode materials in a novel neutral water-in-bisalts electrolyte of 25 m ZnCl2 + 5 m NH4Cl. It delivers a reversible capacity of 155 mAh g−1 at 50 mA g−1, a high average operating potential of ≈1.46 V, and stable cyclability of 7000 cycles at 2 A g−1.

KW - NaV(PO)OF

KW - aqueous batteries

KW - polyanion-type compounds

KW - water-in-bisalts electrolytes

KW - zinc-ion batteries

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A Na₃V₂(PO₄)₂O_1.6F_1.4 Cathode of Zn-Ion Battery Enabled by a Water-in-Bisalt Electrolyte

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Keywords

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