Electrolyte dependence of the performance of a Na2FeP2O7//NaTi2(PO4)3 rechargeable aqueous sodium-ion battery

Kosuke Nakamoto, Yusuke Kano, Ayuko Kitajou, Shigeto Okada

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


Aqueous sodium-ion battery is attractive, because of the low cost and the high safety. However, since the electrochemical window of the aqueous electrolyte is narrow, there have been few reports concerning the optimum cathode materials for use in aqueous sodium-ion batteries up to now. This work focused on Na2FeP2O7 as a cathode material for a novel aqueous sodium-ion battery, and investigated the electrolyte dependence of the performances of a Na2FeP2O7//NaTi2(PO4)3 full-cell. The battery performances such as the rate capability and cyclability of Na2FeP2O7//NaTi2(PO4)3 full-cell with 2 M Na2SO4 or 4 M NaClO4 aqueous electrolyte were better than that with the non-aqueous electrolyte. However, a Na2FeP2O7//NaTi2(PO4)3 full-cell with 4 M NaNO3 aqueous electrolyte exhibited a large irreversible capacity due to the corrosive side reaction.

Original languageEnglish
Pages (from-to)327-332
Number of pages6
JournalJournal of Power Sources
Publication statusPublished - Sep 30 2016

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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