O3-type na(Fe1/3Mn1/3Co1/3)O2 as a cathode material with high rate and good charge-discharge cycle performance for sodium-ion batteries

Takayuki Tsubota, Ayuko Kitajou, Shigeto Okada

Research output: Contribution to journalArticle

Abstract

O3-Na(Fe1/3Mn1/3Co1/3)O2 has been reported as a cathode material with a reversible capacity of 84mAh/g. This cathode active material shows excellent electrochemical performance with a high capacity retention of 95.0% after 100 cycles at 1C rate, and a discharge rate capability of 37mAh/g (47% of the initial capacity of 1C rate) at 50C rate. From the results of electrochemical impedance spectroscopy, an increase in reaction resistance was not confirmed between before and after the charge/discharge cycle test. TEM observation revealed that the crystal structure change on the surface of O3-Na(Fe1/3Mn1/3Co1/3)O2 after the charge/discharge cycle test was slight, and the change in the crystal structure was small compared with that of the lithium ion battery, so O3-Na(Fe1/3Mn1/3Co1/3)O2 has high crystal structure stability.

Original languageEnglish
Pages (from-to)275-279
Number of pages5
JournalEvergreen
Volume6
Issue number4
Publication statusPublished - Dec 2019

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Surfaces, Coatings and Films
  • Management, Monitoring, Policy and Law

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