- Multivalent salts are prone to ion-pair formation in many solvents, particularly the glymes that provide stability at metal anode
- Integration of modeling and NMR techniques has led to an understanding of the glyme ligand effect on the electrochemical properties of Mg electrolytes
- Design metrics including solvent oxygen chain length and chelating properties are identified as promising avenues toward improved solvation of the active cation
Significance and Impact
- Increasing glyme chain length has increased the solvation of the Mg2+ cation, reducing the ion-pair formation, and improved the electrochemical properties of the electrolyte at the metal anode
- The ligand effect will be used to further electrolyte design in other systems
The electrochemical properties of Mg(BH4)2 is enhanced with stronger solvent interaction with cation, which promotes Mg(BH4)2 dissociation.
Work performed at Pacific Northwest National Laboratory (JCESR Partner) Yuyan Shao, Jianzhi Hu, Tianbiao Liu, Mark Engelhard and Jun Liu, Lawrence Berkeley National Laboratory (JCESR Partner), Nav Nidhi Rajput and Kristin Persson