Cathode Properties of Perovskite-type NaMF3 (M=Fe, Mn, and Co) Prepared by Mechanical Ball Milling for Sodium-ion Battery

NaFeF3 and NaMnF3 are promising cathode materials for sodium-ion batteries due to their low cost, low environmental impact and large theoretical capacity. NaCoF3 also has attracted attention as the high voltage cathode material for sodium-ion batteries. But, these ionic NaMF3 (M=Fe, Mn and Co) compo...

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Bibliographic Details
Published in:Electrochimica acta 2017-08, Vol.245, p.424-429
Main Authors: Kitajou, Ayuko, Ishado, Yuji, Yamashita, Tomoki, Momida, Hiroyoshi, Oguchi, Tamio, Okada, Shigeto
Format: Article
Language:English
Subjects:
Cathodes
Cobalt
Conductivity
DFT method
dry ball-milling method
Electric potential
Environmental impact
Flux density
Iron
Manganese
NaFeF3
NaMnF3
Perovskite
Rechargeable batteries
Sodium-ion batteries
Studies
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Summary:NaFeF3 and NaMnF3 are promising cathode materials for sodium-ion batteries due to their low cost, low environmental impact and large theoretical capacity. NaCoF3 also has attracted attention as the high voltage cathode material for sodium-ion batteries. But, these ionic NaMF3 (M=Fe, Mn and Co) compounds have insulating character. To improve the lower electronic conductivity, two-step ball-milling with carbon was performed to obtain a uniform NaMF3 and carbon composite. The rechargeable capacity of NaFeF3 was 169mAhg−1, and its energy density was over 500 Wh kg−1, which is the highest among the reported iron-based cathode materials for sodium-ion batteries. In addition, the experimental voltage for NaMnF3 was ca. 3.4V, and the voltages for NaMF3 (M=Fe and Mn) calculated by the DFT method corresponded well with the experimental results for NaFeF3 and NaMnF3.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.05.153