Eldfellite-type cathode material, NaV(SO4)2, for Na-ion batteries

Akira Nishio; Yuji Ishado; Kosuke Nakamoto; Eiichi Kobayashi; Atsushi Inoishi; Hikari Sakaebe; Shigeto Okada

doi:10.1039/d2ma00031h

Eldfellite-type cathode material, NaV(SO₄)₂, for Na-ion batteries

Akira Nishio, Yuji Ishado, Kosuke Nakamoto, Eiichi Kobayashi, Atsushi Inoishi, Hikari Sakaebe, Shigeto Okada

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

Abstract

In this research, an eldfellite-type material containing V as a transition metal, NaV(SO₄)₂, was investigated to achieve higher potentials and capacities through the use of a multi-redox pair. Average working potentials of 3.9 and 2.1 V vs. Na/Na⁺ were observed, and a large reversible capacity of 102 mA h g⁻¹ was obtained over a wide potential range. Moreover, X-ray absorption near-edge structure and near-edge X-ray absorption fine structure measurements revealed that only V contributes to the charge compensation in the sodiation/desodiation process at low potentials, whereas both V and O contribute to the desodiation/sodiation process at high potentials. This phenomenon was also supported by the density of states and Bader charge analysis based on the DFT calculations.

Original language	English
Pages (from-to)	6993-7001
Number of pages	9
Journal	Materials Advances
Volume	3
Issue number	18
DOIs	https://doi.org/10.1039/d2ma00031h
Publication status	Published - Jun 30 2022

All Science Journal Classification (ASJC) codes

Chemistry (miscellaneous)
Materials Science(all)

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10.1039/d2ma00031h

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title = "Eldfellite-type cathode material, NaV(SO4)2, for Na-ion batteries",

abstract = "In this research, an eldfellite-type material containing V as a transition metal, NaV(SO4)2, was investigated to achieve higher potentials and capacities through the use of a multi-redox pair. Average working potentials of 3.9 and 2.1 V vs. Na/Na+ were observed, and a large reversible capacity of 102 mA h g−1 was obtained over a wide potential range. Moreover, X-ray absorption near-edge structure and near-edge X-ray absorption fine structure measurements revealed that only V contributes to the charge compensation in the sodiation/desodiation process at low potentials, whereas both V and O contribute to the desodiation/sodiation process at high potentials. This phenomenon was also supported by the density of states and Bader charge analysis based on the DFT calculations.",

author = "Akira Nishio and Yuji Ishado and Kosuke Nakamoto and Eiichi Kobayashi and Atsushi Inoishi and Hikari Sakaebe and Shigeto Okada",

note = "Funding Information: This work was financially supported by the MEXT, Japan (ESICB program (JPMXP0112101003) and “Five-star Alliance”) and the JSPS (KAKENHI Grant no. JP20H05297). The experiments using synchrotron radiation were performed at beamlines BL11, BL12, and BL15 of the SAGA Light Source (Proposal No. 1911107R, 2006052R/BL11, 2007070R, 2102009A/BL12, and 2109085R/BL15). DFT calculations were carried out using the computer resources offered under the category of General Projects by the Research Institute for Information Technology, Kyushu University. Publisher Copyright: {\textcopyright} 2022 The Author(s).",

year = "2022",

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doi = "10.1039/d2ma00031h",

language = "English",

volume = "3",

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T1 - Eldfellite-type cathode material, NaV(SO4)2, for Na-ion batteries

AU - Nishio, Akira

AU - Ishado, Yuji

AU - Nakamoto, Kosuke

AU - Kobayashi, Eiichi

AU - Inoishi, Atsushi

AU - Sakaebe, Hikari

AU - Okada, Shigeto

N1 - Funding Information: This work was financially supported by the MEXT, Japan (ESICB program (JPMXP0112101003) and “Five-star Alliance”) and the JSPS (KAKENHI Grant no. JP20H05297). The experiments using synchrotron radiation were performed at beamlines BL11, BL12, and BL15 of the SAGA Light Source (Proposal No. 1911107R, 2006052R/BL11, 2007070R, 2102009A/BL12, and 2109085R/BL15). DFT calculations were carried out using the computer resources offered under the category of General Projects by the Research Institute for Information Technology, Kyushu University. Publisher Copyright: © 2022 The Author(s).

PY - 2022/6/30

Y1 - 2022/6/30

N2 - In this research, an eldfellite-type material containing V as a transition metal, NaV(SO4)2, was investigated to achieve higher potentials and capacities through the use of a multi-redox pair. Average working potentials of 3.9 and 2.1 V vs. Na/Na+ were observed, and a large reversible capacity of 102 mA h g−1 was obtained over a wide potential range. Moreover, X-ray absorption near-edge structure and near-edge X-ray absorption fine structure measurements revealed that only V contributes to the charge compensation in the sodiation/desodiation process at low potentials, whereas both V and O contribute to the desodiation/sodiation process at high potentials. This phenomenon was also supported by the density of states and Bader charge analysis based on the DFT calculations.

AB - In this research, an eldfellite-type material containing V as a transition metal, NaV(SO4)2, was investigated to achieve higher potentials and capacities through the use of a multi-redox pair. Average working potentials of 3.9 and 2.1 V vs. Na/Na+ were observed, and a large reversible capacity of 102 mA h g−1 was obtained over a wide potential range. Moreover, X-ray absorption near-edge structure and near-edge X-ray absorption fine structure measurements revealed that only V contributes to the charge compensation in the sodiation/desodiation process at low potentials, whereas both V and O contribute to the desodiation/sodiation process at high potentials. This phenomenon was also supported by the density of states and Bader charge analysis based on the DFT calculations.

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Eldfellite-type cathode material, NaV(SO₄)₂, for Na-ion batteries

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