Over 2 V Aqueous Sodium-Ion Battery with Prussian Blue-Type Electrodes

Kosuke Nakamoto, Ryo Sakamoto, Yuki Sawada, Masato Ito, Shigeto Okada

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)


High discharge voltage of more than 2 V is achieved in a novel aqueous sodium-ion battery with the combination of a Prussian blue-type sodium manganese hexacyanoferrate cathode, and a similar potassium manganese hexacyanochromate anode. Here, a highly concentrated sodium perchlorate aqueous electrolyte with a 2.8 V electrochemical window is used. By element analysis, the novel anode containing little potassium element possibly serves as a suitable host–guest anode, similarly as the cathode extracting/inserting sodium ion in a highly concentrated sodium-ion aqueous electrolyte. Open-framework electrodes and a highly concentrated but mobile aqueous electrolyte contribute to high voltage and high rate performance of the aqueous sodium-ion battery.

Original languageEnglish
Article number1800220
JournalSmall Methods
Issue number4
Publication statusPublished - Apr 1 2019

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • General Chemistry


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