Amorphous xNaF-FeSO4 Systems (1 ≤ x ≤ 2) with Excellent Cathode Properties for Sodium-Ion Batteries

Ayuko Kitajou; Hiroyoshi Momida; Takahiro Yamashita; Tamio Oguchi; Shigeto Okada

doi:10.1021/acsaem.9b01053

Amorphous xNaF-FeSO₄ Systems (1 ≤ x ≤ 2) with Excellent Cathode Properties for Sodium-Ion Batteries

Ayuko Kitajou, Hiroyoshi Momida, Takahiro Yamashita, Tamio Oguchi, Shigeto Okada

Department of Advanced Device Materials

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

10 Citations (Scopus)

Abstract

NaFeSO₄F is a promising cathode for Na-ion batteries because of its high operating voltage and the abundance of iron resources. We synthesized amorphous xNaF-FeSO₄ (1 ≤ x ≤ 2) systems with a dry-ball milling method, and heating of the amorphous NaF-FeSO₄ successfully gave crystalline NaFeSO₄F. The crystalline NaFeSO₄F had a reversible capacity of 66 mAh g^-1, which is larger than the reported value. Amorphous 1.3NaF-FeSO₄ exhibited the largest reversible capacity in the xNaF-FeSO₄ (1 ≤ x ≤ 2) series. Although amorphous xNaF-FeSO₄ showed a lower rate capability than that of obtained crystalline NaFeSO₄F, its reversible capacities in all compositions were larger than that of crystalline NaFeSO₄F.

Original language	English
Pages (from-to)	5968-5974
Number of pages	7
Journal	ACS Applied Energy Materials
Volume	2
Issue number	8
DOIs	https://doi.org/10.1021/acsaem.9b01053
Publication status	Published - Aug 26 2019

All Science Journal Classification (ASJC) codes

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

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10.1021/acsaem.9b01053

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title = "Amorphous xNaF-FeSO4 Systems (1 ≤ x ≤ 2) with Excellent Cathode Properties for Sodium-Ion Batteries",

abstract = "NaFeSO4F is a promising cathode for Na-ion batteries because of its high operating voltage and the abundance of iron resources. We synthesized amorphous xNaF-FeSO4 (1 ≤ x ≤ 2) systems with a dry-ball milling method, and heating of the amorphous NaF-FeSO4 successfully gave crystalline NaFeSO4F. The crystalline NaFeSO4F had a reversible capacity of 66 mAh g-1, which is larger than the reported value. Amorphous 1.3NaF-FeSO4 exhibited the largest reversible capacity in the xNaF-FeSO4 (1 ≤ x ≤ 2) series. Although amorphous xNaF-FeSO4 showed a lower rate capability than that of obtained crystalline NaFeSO4F, its reversible capacities in all compositions were larger than that of crystalline NaFeSO4F.",

author = "Ayuko Kitajou and Hiroyoshi Momida and Takahiro Yamashita and Tamio Oguchi and Shigeto Okada",

note = "Funding Information: This work was performed under the Cooperative Research Program of the Network Joint Research Center for Materials and Devices. We received financial support from the Elements Strategy Initiative to Form Core Research Center and the Elements Strategy Initiative for Catalysts & Batteries (ESICB) program of MEXT, Japan. Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

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doi = "10.1021/acsaem.9b01053",

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AU - Kitajou, Ayuko

AU - Momida, Hiroyoshi

AU - Yamashita, Takahiro

AU - Oguchi, Tamio

AU - Okada, Shigeto

N1 - Funding Information: This work was performed under the Cooperative Research Program of the Network Joint Research Center for Materials and Devices. We received financial support from the Elements Strategy Initiative to Form Core Research Center and the Elements Strategy Initiative for Catalysts & Batteries (ESICB) program of MEXT, Japan. Publisher Copyright: © 2019 American Chemical Society.

PY - 2019/8/26

Y1 - 2019/8/26

N2 - NaFeSO4F is a promising cathode for Na-ion batteries because of its high operating voltage and the abundance of iron resources. We synthesized amorphous xNaF-FeSO4 (1 ≤ x ≤ 2) systems with a dry-ball milling method, and heating of the amorphous NaF-FeSO4 successfully gave crystalline NaFeSO4F. The crystalline NaFeSO4F had a reversible capacity of 66 mAh g-1, which is larger than the reported value. Amorphous 1.3NaF-FeSO4 exhibited the largest reversible capacity in the xNaF-FeSO4 (1 ≤ x ≤ 2) series. Although amorphous xNaF-FeSO4 showed a lower rate capability than that of obtained crystalline NaFeSO4F, its reversible capacities in all compositions were larger than that of crystalline NaFeSO4F.

AB - NaFeSO4F is a promising cathode for Na-ion batteries because of its high operating voltage and the abundance of iron resources. We synthesized amorphous xNaF-FeSO4 (1 ≤ x ≤ 2) systems with a dry-ball milling method, and heating of the amorphous NaF-FeSO4 successfully gave crystalline NaFeSO4F. The crystalline NaFeSO4F had a reversible capacity of 66 mAh g-1, which is larger than the reported value. Amorphous 1.3NaF-FeSO4 exhibited the largest reversible capacity in the xNaF-FeSO4 (1 ≤ x ≤ 2) series. Although amorphous xNaF-FeSO4 showed a lower rate capability than that of obtained crystalline NaFeSO4F, its reversible capacities in all compositions were larger than that of crystalline NaFeSO4F.

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Amorphous xNaF-FeSO₄ Systems (1 ≤ x ≤ 2) with Excellent Cathode Properties for Sodium-Ion Batteries

Abstract

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