Electrochemical investigations of high-voltage Na4Ni3(PO4)2P2O7 cathode for sodium-ion batteries

P. Ramesh Kumar; H. B. Yahia; I. Belharouak; M. T. Sougrati; S. Passerini; R. Amin; R. Essehli

doi:10.1007/s10008-019-04448-6

Electrochemical investigations of high-voltage Na₄Ni₃(PO₄)₂P₂O₇ cathode for sodium-ion batteries

P. Ramesh Kumar, H. B. Yahia, I. Belharouak, M. T. Sougrati, S. Passerini, R. Amin, R. Essehli

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

28 Scopus citations

Abstract

The electrochemical properties of carbon and reduced graphene-coated Na₄Ni₃(PO₄)₂P₂O₇ materials have been evaluated as high-voltage positive electrodes for sodium-ion batteries. Na₄Ni₃(PO₄)₂P₂O₇ exhibits the highest Ni³⁺/Ni²⁺ redox potential of 4.8 V vs. Na⁺/Na with a theoretical capacity of 127 mAh g⁻¹. Here, we report on the synthesis and characterizations of Na₄Ni₃(PO₄)₂P₂O₇-reduced graphene oxide and Na₄Ni₃(PO₄)₂P₂O₇-carbon composites. The high-voltage dimethyl carbonate–based electrolyte has been chosen to explore the electrochemical properties of Na₄Ni₃(PO₄)₂P₂O₇ as a cathode. Carbon-coated Na₄Ni₃(PO₄)₂P₂O₇ composite electrode delivers a stable discharge capacity of 51 mAh g⁻¹ at 0.1 C rate for 40 cycles which corresponds to a reversible intercalation/de-intercalation of 1.3 sodium ions. The structural deformation has been observed during the charge–discharge process beyond the removal of 1.3 Na⁺ ions and has been confirmed by in situ PXRD measurements. The present results provide a guideline to improve the performances of the high-voltage Na₄Ni₃(PO₄)₂P₂O₇ material for the next generation sodium-ion batteries.

Original language	English
Pages (from-to)	17-24
Number of pages	8
Journal	Journal of Solid State Electrochemistry
Volume	24
Issue number	1
DOIs	https://doi.org/10.1007/s10008-019-04448-6
State	Published - Jan 1 2020

Funding

Authors received financial support from National Priorities Research Program (NPRP9-263-2-122) funded by Qatar National Research Fund (QNRF). Authors thank their colleagues in the characterization team (Core Laboratories) at Qatar Environment and Energy Research Institute (QEERI) for providing characterization test data.

Funders	Funder number
National Priorities Research Program	NPRP9-263-2-122
Qatar Environment and Energy Research Institute
Qatar National Research Fund

Keywords

Electrolytes
High-voltage cathode
In situ PXRD
Phosphates
Sodium-ion batteries

UN SDGs

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

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10.1007/s10008-019-04448-6

Cite this

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title = "Electrochemical investigations of high-voltage Na4Ni3(PO4)2P2O7 cathode for sodium-ion batteries",

abstract = "The electrochemical properties of carbon and reduced graphene-coated Na4Ni3(PO4)2P2O7 materials have been evaluated as high-voltage positive electrodes for sodium-ion batteries. Na4Ni3(PO4)2P2O7 exhibits the highest Ni3+/Ni2+ redox potential of 4.8 V vs. Na+/Na with a theoretical capacity of 127 mAh g−1. Here, we report on the synthesis and characterizations of Na4Ni3(PO4)2P2O7-reduced graphene oxide and Na4Ni3(PO4)2P2O7-carbon composites. The high-voltage dimethyl carbonate–based electrolyte has been chosen to explore the electrochemical properties of Na4Ni3(PO4)2P2O7 as a cathode. Carbon-coated Na4Ni3(PO4)2P2O7 composite electrode delivers a stable discharge capacity of 51 mAh g−1 at 0.1 C rate for 40 cycles which corresponds to a reversible intercalation/de-intercalation of 1.3 sodium ions. The structural deformation has been observed during the charge–discharge process beyond the removal of 1.3 Na+ ions and has been confirmed by in situ PXRD measurements. The present results provide a guideline to improve the performances of the high-voltage Na4Ni3(PO4)2P2O7 material for the next generation sodium-ion batteries.",

keywords = "Electrolytes, High-voltage cathode, In situ PXRD, Phosphates, Sodium-ion batteries",

author = "Kumar, {P. Ramesh} and Yahia, {H. B.} and I. Belharouak and Sougrati, {M. T.} and S. Passerini and R. Amin and R. Essehli",

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AU - Belharouak, I.

AU - Sougrati, M. T.

AU - Passerini, S.

AU - Amin, R.

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AB - The electrochemical properties of carbon and reduced graphene-coated Na4Ni3(PO4)2P2O7 materials have been evaluated as high-voltage positive electrodes for sodium-ion batteries. Na4Ni3(PO4)2P2O7 exhibits the highest Ni3+/Ni2+ redox potential of 4.8 V vs. Na+/Na with a theoretical capacity of 127 mAh g−1. Here, we report on the synthesis and characterizations of Na4Ni3(PO4)2P2O7-reduced graphene oxide and Na4Ni3(PO4)2P2O7-carbon composites. The high-voltage dimethyl carbonate–based electrolyte has been chosen to explore the electrochemical properties of Na4Ni3(PO4)2P2O7 as a cathode. Carbon-coated Na4Ni3(PO4)2P2O7 composite electrode delivers a stable discharge capacity of 51 mAh g−1 at 0.1 C rate for 40 cycles which corresponds to a reversible intercalation/de-intercalation of 1.3 sodium ions. The structural deformation has been observed during the charge–discharge process beyond the removal of 1.3 Na+ ions and has been confirmed by in situ PXRD measurements. The present results provide a guideline to improve the performances of the high-voltage Na4Ni3(PO4)2P2O7 material for the next generation sodium-ion batteries.

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