Realizing the Multi-electron Reaction in the Na3V2(PO4)3Cathode via Reversible Insertion of Dihydrogen Phosphate Anions

Qiao Ni; Qiubo Guo; Haixia Ren; Ying Bai; Chuan Wu

doi:10.1021/acsami.1c22021

Realizing the Multi-electron Reaction in the Na₃V₂(PO₄)₃Cathode via Reversible Insertion of Dihydrogen Phosphate Anions

Qiao Ni, Qiubo Guo, Haixia Ren, Ying Bai^*, Chuan Wu^*

^*Corresponding author for this work

School of Material Science and Engineering

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

6 Citations (Scopus)

Abstract

Dual-ion battery (DIB) is an up-and-coming technology for the energy storage field. However, most of the current cathodes are still focused on the graphite hosts, which deliver a limited specific capacity. In this work, we demonstrated for the first time that H2PO4- can be used as the charge carrier for Na3V2(PO4)3 under an aqueous electrolyte, which enabled the V3+/V4+ and V4+/V5+ multielectron reactions in the Na3V2(PO4)3 electrode. The fabricated aqueous DIB delivers a high average voltage of ∼0.75 V (vs Ag/AgCl) and a high capacity of 280.7 mA h g-1. Moreover, the formed V5+-based novel cathode exhibits a capacity of 170.2 mA h g-1 in an organic sodium-ion battery. This study may open a new direction for fabricating high-voltage electrodes through the design of DIBs.

Original language	English
Pages (from-to)	1233-1240
Number of pages	8
Journal	ACS applied materials & interfaces
Volume	14
Issue number	1
DOIs	https://doi.org/10.1021/acsami.1c22021
Publication status	Published - 12 Jan 2022

Keywords

NaV(PO)
aqueous electrolyte
cathode
dual-ion batteries
energy storage

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10.1021/acsami.1c22021

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title = "Realizing the Multi-electron Reaction in the Na3V2(PO4)3Cathode via Reversible Insertion of Dihydrogen Phosphate Anions",

abstract = "Dual-ion battery (DIB) is an up-and-coming technology for the energy storage field. However, most of the current cathodes are still focused on the graphite hosts, which deliver a limited specific capacity. In this work, we demonstrated for the first time that H2PO4- can be used as the charge carrier for Na3V2(PO4)3 under an aqueous electrolyte, which enabled the V3+/V4+ and V4+/V5+ multielectron reactions in the Na3V2(PO4)3 electrode. The fabricated aqueous DIB delivers a high average voltage of ∼0.75 V (vs Ag/AgCl) and a high capacity of 280.7 mA h g-1. Moreover, the formed V5+-based novel cathode exhibits a capacity of 170.2 mA h g-1 in an organic sodium-ion battery. This study may open a new direction for fabricating high-voltage electrodes through the design of DIBs.",

keywords = "NaV(PO), aqueous electrolyte, cathode, dual-ion batteries, energy storage",

author = "Qiao Ni and Qiubo Guo and Haixia Ren and Ying Bai and Chuan Wu",

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AU - Ni, Qiao

AU - Guo, Qiubo

AU - Ren, Haixia

AU - Bai, Ying

AU - Wu, Chuan

PY - 2022/1/12

Y1 - 2022/1/12

N2 - Dual-ion battery (DIB) is an up-and-coming technology for the energy storage field. However, most of the current cathodes are still focused on the graphite hosts, which deliver a limited specific capacity. In this work, we demonstrated for the first time that H2PO4- can be used as the charge carrier for Na3V2(PO4)3 under an aqueous electrolyte, which enabled the V3+/V4+ and V4+/V5+ multielectron reactions in the Na3V2(PO4)3 electrode. The fabricated aqueous DIB delivers a high average voltage of ∼0.75 V (vs Ag/AgCl) and a high capacity of 280.7 mA h g-1. Moreover, the formed V5+-based novel cathode exhibits a capacity of 170.2 mA h g-1 in an organic sodium-ion battery. This study may open a new direction for fabricating high-voltage electrodes through the design of DIBs.

AB - Dual-ion battery (DIB) is an up-and-coming technology for the energy storage field. However, most of the current cathodes are still focused on the graphite hosts, which deliver a limited specific capacity. In this work, we demonstrated for the first time that H2PO4- can be used as the charge carrier for Na3V2(PO4)3 under an aqueous electrolyte, which enabled the V3+/V4+ and V4+/V5+ multielectron reactions in the Na3V2(PO4)3 electrode. The fabricated aqueous DIB delivers a high average voltage of ∼0.75 V (vs Ag/AgCl) and a high capacity of 280.7 mA h g-1. Moreover, the formed V5+-based novel cathode exhibits a capacity of 170.2 mA h g-1 in an organic sodium-ion battery. This study may open a new direction for fabricating high-voltage electrodes through the design of DIBs.

KW - NaV(PO)

KW - aqueous electrolyte

KW - cathode

KW - dual-ion batteries

KW - energy storage

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Realizing the Multi-electron Reaction in the Na₃V₂(PO₄)₃Cathode via Reversible Insertion of Dihydrogen Phosphate Anions

Abstract

Keywords

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