Triggering the Reversible Reaction of V3+/V4+/V5+in Na3V2(PO4)3by Cr3+Substitution

Qianchen Wang; Yongjie Zhao; Junjie Gao; Huayun Geng; Jingbo Li; Haibo Jin

doi:10.1021/acsami.0c11975

Triggering the Reversible Reaction of V³⁺/V⁴⁺/V⁵⁺in Na₃V₂(PO₄)₃by Cr³⁺Substitution

Qianchen Wang, Yongjie Zhao, Junjie Gao, Huayun Geng, Jingbo Li, Haibo Jin

School of Material Science and Engineering

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

58 Citations (Scopus)

Abstract

Sodium-ion batteries (SIBs) have grabbed worldwide attention as an alternative to lithium-ion batteries on account of the abundance and accessibility of the sodium element in nature. For the sake of meeting the requirements for various applications containing grid-scale energy storage system, electric vehicles, and so forth, a stable and high-voltage cathode is decisive to enhance the energy and power density of SIBs. In this research, sodium super ionic conductor structured Na3V1.5-xCr0.5+x(PO4)3 with different V/Cr ratios to balance the V3+/V4+ and V4+/V5+ redox couples was investigated as the potential cathode for SIBs. Among these candidates, Na3V1.3Cr0.7(PO4)3 manifested high energy density together with good cycling performance and rate capability. Combining the structural analysis and density functional theory calculation, the underlying mechanism of V3+ substitution by Cr3+ was uncovered, accounting for the improvement of electrochemical performance.

Original language	English
Pages (from-to)	50315-50323
Number of pages	9
Journal	ACS applied materials & interfaces
Volume	12
Issue number	45
DOIs	https://doi.org/10.1021/acsami.0c11975
Publication status	Published - 11 Nov 2020

Keywords

NaVCr(PO)
density functional theory
electrochemical properties
sodium-ion battery
structural analysis

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Access to Document

10.1021/acsami.0c11975

Cite this

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title = "Triggering the Reversible Reaction of V3+/V4+/V5+in Na3V2(PO4)3by Cr3+Substitution",

abstract = "Sodium-ion batteries (SIBs) have grabbed worldwide attention as an alternative to lithium-ion batteries on account of the abundance and accessibility of the sodium element in nature. For the sake of meeting the requirements for various applications containing grid-scale energy storage system, electric vehicles, and so forth, a stable and high-voltage cathode is decisive to enhance the energy and power density of SIBs. In this research, sodium super ionic conductor structured Na3V1.5-xCr0.5+x(PO4)3 with different V/Cr ratios to balance the V3+/V4+ and V4+/V5+ redox couples was investigated as the potential cathode for SIBs. Among these candidates, Na3V1.3Cr0.7(PO4)3 manifested high energy density together with good cycling performance and rate capability. Combining the structural analysis and density functional theory calculation, the underlying mechanism of V3+ substitution by Cr3+ was uncovered, accounting for the improvement of electrochemical performance.",

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author = "Qianchen Wang and Yongjie Zhao and Junjie Gao and Huayun Geng and Jingbo Li and Haibo Jin",

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AU - Zhao, Yongjie

AU - Gao, Junjie

AU - Geng, Huayun

AU - Li, Jingbo

AU - Jin, Haibo

PY - 2020/11/11

Y1 - 2020/11/11

N2 - Sodium-ion batteries (SIBs) have grabbed worldwide attention as an alternative to lithium-ion batteries on account of the abundance and accessibility of the sodium element in nature. For the sake of meeting the requirements for various applications containing grid-scale energy storage system, electric vehicles, and so forth, a stable and high-voltage cathode is decisive to enhance the energy and power density of SIBs. In this research, sodium super ionic conductor structured Na3V1.5-xCr0.5+x(PO4)3 with different V/Cr ratios to balance the V3+/V4+ and V4+/V5+ redox couples was investigated as the potential cathode for SIBs. Among these candidates, Na3V1.3Cr0.7(PO4)3 manifested high energy density together with good cycling performance and rate capability. Combining the structural analysis and density functional theory calculation, the underlying mechanism of V3+ substitution by Cr3+ was uncovered, accounting for the improvement of electrochemical performance.

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KW - NaVCr(PO)

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