Concentration-dependent ion correlations impact the electrochemical behavior of calcium battery electrolytes
Nathan Hahn, Julian Self, Darren M. Driscoll, Naveen K. Dandu, Kee Sung Han, Vijayakumar Murugesan, Karl T. Mueller, Larry A. Curtiss, Mahalingam Balasubramanian, Kristin A. Persson, Kevin R. Zavadil
Abstract
solvation environment across these concentration regimes reveals a progressive transition from well-defined solvent-separated ion pairs to de-correlated free ions. This transition in ion correlation results in improvements in both conductivity and calcium cycling stability with increased salt concentration. Comparison with previous findings involving more strongly associating salts highlights the generality of this phenomenon, leading to important insight into controlling ion interactions in ether-based multivalent battery electrolytes.
Topics & Concepts
ElectrolyteChemistrySolvationIonElectrochemistrySolventElectrochemical windowInorganic chemistryConductivityBattery (electricity)Salt (chemistry)Ionic conductivityPhysical chemistryThermodynamicsOrganic chemistryPhysicsPower (physics)ElectrodeAdvanced Battery Materials and TechnologiesAdvancements in Battery MaterialsAdvanced battery technologies research