Electrochemical and thermal properties of α-NaFeO2 cathode for Na-ion batteries

Jie Zhao, Liwei Zhao, Nikolay Dimov, Shigeto Okada, Tetsuaki Nishida

Research output: Contribution to journalArticle

134 Citations (Scopus)

Abstract

α-NaFeO2 is promising as minor-metal free cathode materials for low cost sodium-ion batteries. It has a flat voltage plateau at 3.3 V vs. Na metal and a stable reversible capacity of 85 mAh g-1. Fe3+/Fe4+ redox reaction on charge/discharge cycle was confirmed by 57Fe Mössbauer spectrometer. The thermal stability of NaFeO2 cathodes with/without 1 mol dm-3 NaClO 4/EC-DMC electrolyte was investigated by DSC measurements. The fully-charged Na0.58FeO2 powder decomposed thermally at a temperature higher than 300°C, with Fe2O3 as a possible product. On the other hand, the mixture of Na0.58FeO 2 powder and electrolyte showed exothermic heat in a temperature range of 220-300°C. However, NaFeO2 showed better thermal stability in the electrolyte than LiCoO2 counterparts in Li ion battery systems, including less heat generation and higher exothermic onset temperature. This indicated that the Na-ion batteries might have comparable thermal stability with Li-ion batteries.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume160
Issue number5
DOIs
Publication statusPublished - 2013

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Electrochemical properties
Electrolytes
electric batteries
Cathodes
Thermodynamic stability
Thermodynamic properties
thermodynamic properties
cathodes
Ions
Powders
thermal stability
electrolytes
Metals
ions
Redox reactions
Heat generation
Temperature
Spectrometers
heat generation
Sodium

All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Electrochemical and thermal properties of α-NaFeO2 cathode for Na-ion batteries. / Zhao, Jie; Zhao, Liwei; Dimov, Nikolay; Okada, Shigeto; Nishida, Tetsuaki.

In: Journal of the Electrochemical Society, Vol. 160, No. 5, 2013.

Research output: Contribution to journalArticle

Zhao, Jie ; Zhao, Liwei ; Dimov, Nikolay ; Okada, Shigeto ; Nishida, Tetsuaki. / Electrochemical and thermal properties of α-NaFeO2 cathode for Na-ion batteries. In: Journal of the Electrochemical Society. 2013 ; Vol. 160, No. 5.
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