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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Published inElectrochimica acta Vol. 245; pp. 424 - 429
Main Authors Kitajou, Ayuko, Ishado, Yuji, Yamashita, Tomoki, Momida, Hiroyoshi, Oguchi, Tamio, Okada, Shigeto
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 10.08.2017
Elsevier BV
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
dry ball-milling method
NaMnF3
NaFeF3
sodium ion batteries
DFT method
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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