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- W2217948772 endingPage "354003" @default.
- W2217948772 startingPage "354003" @default.
- W2217948772 abstract "High throughput screening of solvents and additives with potential applications in lithium batteries is reported. The initial test set is limited to carbonate and phosphate-based compounds and focused on their electrochemical properties. Solvent stability towards first and second reduction and oxidation is reported from density functional theory (DFT) calculations performed on isolated solvents surrounded by implicit solvent. The reorganization energy is estimated from the difference between vertical and adiabatic redox energies and found to be especially important for the accurate prediction of reduction stability. A majority of tested compounds had the second reduction potential higher than the first reduction potential indicating that the second reduction reaction might play an important role in the passivation layer formation. Similarly, the second oxidation potential was smaller for a significant subset of tested molecules than the first oxidation potential. A number of potential sources of errors introduced during screening of the electrolyte electrochemical properties were examined. The formation of lithium fluoride during reduction of semifluorinated solvents such as fluoroethylene carbonate and the H-transfer during oxidation of solvents were found to shift the electrochemical potential by 1.5-2 V and could shrink the electrochemical stability window by as much as 3.5 V when such reactions are included in the screening procedure. The initial oxidation reaction of ethylene carbonate and dimethyl carbonate at the surface of the completely de-lithiated LiNi0.5Mn1.5O4 high voltage spinel cathode was examined using DFT. Depending on the molecular orientation at the cathode surface, a carbonate molecule either exhibited deprotonation or was found bound to the transition metal via its carbonyl oxygen." @default.
- W2217948772 created "2016-06-24" @default.
- W2217948772 creator A5004826731 @default.
- W2217948772 creator A5009243970 @default.
- W2217948772 creator A5033232566 @default.
- W2217948772 creator A5042561977 @default.
- W2217948772 creator A5091080535 @default.
- W2217948772 date "2015-08-12" @default.
- W2217948772 modified "2023-10-17" @default.
- W2217948772 title "Towards high throughput screening of electrochemical stability of battery electrolytes" @default.
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