Towards novel calcium battery electrolytes by efficient computational screening

نویسندگان

چکیده

The development of Ca conducting electrolytes is key to enable functional rechargeable batteries. here presented screening strategy initially based on a combined density theory (DFT) and conductor-like model for real solvents (COSMO-RS) approach, which allows rational selection electrolyte solvent set physico-chemical electrochemical properties: solvation power, stability window, viscosity, flash boiling points. Starting from 81 solvents, N,N-dimethylformamide (DMF) was chosen as further studies cation-solvent interactions subsequent comparisons vs. cation-anion possibly present in electrolytes, limited Ca-salts. A Ca2+ first shell [Ca(DMF)8]2+ found be energetically preferred, even compared ion-pairs aggregates, especially PF6− TFSI the anions. Overall, this points Ca(TFSI)2 Ca(PF6)2 dissolved DMF promising base batteries point-of-view. While assessments certainly are needed verify promise, efficient useful stepping-stone reduce overall R&D effort.

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ژورنال

عنوان ژورنال: Energy Storage Materials

سال: 2021

ISSN: ['2405-8297', '2405-8289']

DOI: https://doi.org/10.1016/j.ensm.2021.04.015