DataVXACS Applied Energy MaterialsPaper
journal article·2019-08-26

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

ACS Applied Energy Materials· Volume 2· Issue 8
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Source abstract

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.
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Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Magnetic Properties and Synthesis of Ferrites · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Organization for Research Initiatives, Yamaguchi University, 2-16-1 Tokiwadai, Ube 755-8611, Japan

Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyoto 615-8510, Japan

Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga 816-8580, Japan

Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

Funding

Ministry of Education, Culture, Sports, Science and Technology

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