Insights into Reversible Sodium Intercalation in a Novel Sodium-Deficient NASICON-Type Structure:Na3.40□0.60Co0.5Fe0.5V(PO4)3

Jingrong Hou; Mohammed Hadouchi; Lijun Sui; Jie Liu; Mingxue Tang; Zhiwei Hu; Hong Ji Lin; Chang Yang Kuo; Chien Te Chen; Chih Wen Pao; Yunhui Huang; Jiwei Ma

doi:10.1002/smll.202302726

Insights into Reversible Sodium Intercalation in a Novel Sodium-Deficient NASICON-Type Structure:Na_3.40□_0.60Co_0.5Fe_0.5V(PO₄)₃

Jingrong Hou, Mohammed Hadouchi^*, Lijun Sui, Jie Liu, Mingxue Tang, Zhiwei Hu, Hong Ji Lin, Chang Yang Kuo, Chien Te Chen, Chih Wen Pao, Yunhui Huang, Jiwei Ma^*

^*Corresponding author for this work

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

10 Scopus citations

Abstract

The rational design of novel high-performance cathode materials for sodium-ion batteries is a challenge for the development of the renewable energy sector. Here, a new sodium-deficient NASICON phosphate, namely Na_3.40□_0.60Co_0.5Fe_0.5V(PO₄)₃, demonstrating the excellent electrochemical performance is reported. The presence of Co allows a third Na⁺ to participate in the reaction thus exhibiting a high reversible capacity of ≈155 mAh g⁻¹ in the voltage range of 2.0–4.0 V versus Na⁺/Na with a reversible single-phase mechanism and a small volume shrinkage of ≈5.97% at 4.0 V. ²³Na solid-state nuclear magnetic resonance (NMR) combined with ex situ X-ray diffraction (XRD) refinements provide evidence for a preferential Na⁺ insertion within the Na2 site. Furthermore, the enhanced sodium kinetics ascribed to Co-substitution is also confirmed in combination with electrochemical impedance spectroscopy (EIS), galvanostatic intermittent titration technique (GITT), and theoretical calculation.

Original language	English
Article number	2302726
Journal	Small
Volume	19
Issue number	46
DOIs	https://doi.org/10.1002/smll.202302726
State	Published - 15 Nov 2023

Keywords

NASICON-type structures
operando X-ray diffraction
single-phase reaction mechanism
sodium intercalation
sodium-deficient

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

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10.1002/smll.202302726

Cite this

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title = "Insights into Reversible Sodium Intercalation in a Novel Sodium-Deficient NASICON-Type Structure:Na3.40□0.60Co0.5Fe0.5V(PO4)3",

abstract = "The rational design of novel high-performance cathode materials for sodium-ion batteries is a challenge for the development of the renewable energy sector. Here, a new sodium-deficient NASICON phosphate, namely Na3.40□0.60Co0.5Fe0.5V(PO4)3, demonstrating the excellent electrochemical performance is reported. The presence of Co allows a third Na+ to participate in the reaction thus exhibiting a high reversible capacity of ≈155 mAh g−1 in the voltage range of 2.0–4.0 V versus Na+/Na with a reversible single-phase mechanism and a small volume shrinkage of ≈5.97% at 4.0 V. 23Na solid-state nuclear magnetic resonance (NMR) combined with ex situ X-ray diffraction (XRD) refinements provide evidence for a preferential Na+ insertion within the Na2 site. Furthermore, the enhanced sodium kinetics ascribed to Co-substitution is also confirmed in combination with electrochemical impedance spectroscopy (EIS), galvanostatic intermittent titration technique (GITT), and theoretical calculation.",

keywords = "NASICON-type structures, operando X-ray diffraction, single-phase reaction mechanism, sodium intercalation, sodium-deficient",

author = "Jingrong Hou and Mohammed Hadouchi and Lijun Sui and Jie Liu and Mingxue Tang and Zhiwei Hu and Lin, {Hong Ji} and Kuo, {Chang Yang} and Chen, {Chien Te} and Pao, {Chih Wen} and Yunhui Huang and Jiwei Ma",

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T1 - Insights into Reversible Sodium Intercalation in a Novel Sodium-Deficient NASICON-Type Structure:Na3.40□0.60Co0.5Fe0.5V(PO4)3

AU - Hou, Jingrong

AU - Hadouchi, Mohammed

AU - Sui, Lijun

AU - Liu, Jie

AU - Tang, Mingxue

AU - Hu, Zhiwei

AU - Lin, Hong Ji

AU - Kuo, Chang Yang

AU - Chen, Chien Te

AU - Pao, Chih Wen

AU - Huang, Yunhui

AU - Ma, Jiwei

PY - 2023/11/15

Y1 - 2023/11/15

N2 - The rational design of novel high-performance cathode materials for sodium-ion batteries is a challenge for the development of the renewable energy sector. Here, a new sodium-deficient NASICON phosphate, namely Na3.40□0.60Co0.5Fe0.5V(PO4)3, demonstrating the excellent electrochemical performance is reported. The presence of Co allows a third Na+ to participate in the reaction thus exhibiting a high reversible capacity of ≈155 mAh g−1 in the voltage range of 2.0–4.0 V versus Na+/Na with a reversible single-phase mechanism and a small volume shrinkage of ≈5.97% at 4.0 V. 23Na solid-state nuclear magnetic resonance (NMR) combined with ex situ X-ray diffraction (XRD) refinements provide evidence for a preferential Na+ insertion within the Na2 site. Furthermore, the enhanced sodium kinetics ascribed to Co-substitution is also confirmed in combination with electrochemical impedance spectroscopy (EIS), galvanostatic intermittent titration technique (GITT), and theoretical calculation.

AB - The rational design of novel high-performance cathode materials for sodium-ion batteries is a challenge for the development of the renewable energy sector. Here, a new sodium-deficient NASICON phosphate, namely Na3.40□0.60Co0.5Fe0.5V(PO4)3, demonstrating the excellent electrochemical performance is reported. The presence of Co allows a third Na+ to participate in the reaction thus exhibiting a high reversible capacity of ≈155 mAh g−1 in the voltage range of 2.0–4.0 V versus Na+/Na with a reversible single-phase mechanism and a small volume shrinkage of ≈5.97% at 4.0 V. 23Na solid-state nuclear magnetic resonance (NMR) combined with ex situ X-ray diffraction (XRD) refinements provide evidence for a preferential Na+ insertion within the Na2 site. Furthermore, the enhanced sodium kinetics ascribed to Co-substitution is also confirmed in combination with electrochemical impedance spectroscopy (EIS), galvanostatic intermittent titration technique (GITT), and theoretical calculation.

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