Layered Na2RuO3 as a cathode material for Na-ion batteries

Mao Tamaru, Xianfen Wang, Masashi Okubo, Atsuo Yamada*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)


Na-ion batteries have attracted much interest recently due to strong industrial demands for inexpensive and efficient energy storage. Although layered NaxMO2 (0 < x < 1, M: transition metal) is the subject of intense studies as cathode materials for the Na-ion batteries, the electrochemical properties of layered Na2MO3 have not been clarified to date. The present work demonstrates that Na 2RuO3 can show reversible Na-ion insertion/extraction leading to the specific capacity of 140 mA h g-1 at the average potential of 2.8 V vs. Na/Na+. Both the capacity retention and Coulombic efficiency are kept at almost 100% during 20 cycles, which suggests high reversibility of the electrochemical reaction. Due to the fast Na-ion diffusion and metallic conduction, Na2RuO3 can show the excellent rate capability, where 53% of the maximum discharge capacity is retained even at a high discharge rate of 5C.

Original languageEnglish
Pages (from-to)23-26
Number of pages4
JournalElectrochemistry Communications
Publication statusPublished - 2013
Externally publishedYes


  • Cathode materials
  • Electrochemistry
  • Ruthenium oxide
  • Sodium-ion batteries

ASJC Scopus subject areas

  • Electrochemistry


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