Issue 3, 2021

Boron-vertex modification of carba-closo-dodecaborate for high-performance magnesium-ion battery electrolyte

Abstract

Further advances in magnesium ion batteries (MIBs) require the development of electrolyte solutions with highly optimized properties. Here we report the design, synthesis and electrolytic properties of a new family of Mg salts of carba-closo-dodecaborate anions (CCAs). Detailed calculations suggested that modification at the boron vertices, previously considered inappropriate for MIB electrolytes, would be effective. Experimental studies showed that simple halogenation at the 12-B vertex of CCA drastically improves the solubility in low viscosity solvents without compromising the chemical and redox stability, and the ionic conductivity reached 6.2 mS/cm. The synthesized electrolytes showed low overpotential (≤200 mV) for Mg deposition and excellent reversible magnesium deposition/stripping with high Coulombic efficiency (≥95%).

Graphical abstract: Boron-vertex modification of carba-closo-dodecaborate for high-performance magnesium-ion battery electrolyte

Supplementary files

Article information

Article type
Communication
Submitted
25 Nov. 2020
Accepted
25 Dec. 2020
First published
26 Janv. 2021
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2021,2, 937-941

Boron-vertex modification of carba-closo-dodecaborate for high-performance magnesium-ion battery electrolyte

M. Watanabe, J. Kanazawa, T. Hamamura, T. Shimokawa, K. Miyamoto, M. Hibino, K. Nakura, Y. Inatomi, Y. Kitazawa and M. Uchiyama, Mater. Adv., 2021, 2, 937 DOI: 10.1039/D0MA00925C

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