Monocarborane cluster as a stable fluorine-free calcium battery electrolyte

Kazuaki Kisu, Sangryun Kim, Takara Shinohara, Kun Zhao, Andreas Züttel, Shin ichi Orimo

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


High-energy-density and low-cost calcium (Ca) batteries have been proposed as ‘beyond-Li-ion’ electrochemical energy storage devices. However, they have seen limited progress due to challenges associated with developing electrolytes showing reductive/oxidative stabilities and high ionic conductivities. This paper describes a calcium monocarborane cluster salt in a mixed solvent as a Ca-battery electrolyte with high anodic stability (up to 4 V vs. Ca2+/Ca), high ionic conductivity (4 mS cm−1), and high Coulombic efficiency for Ca plating/stripping at room temperature. The developed electrolyte is a promising candidate for use in room-temperature rechargeable Ca batteries.

Original languageEnglish
Article number7563
JournalScientific Reports
Issue number1
Publication statusPublished - 2021 Dec


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