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Exploring Eutectic Mixing of Quinones for Engineering High Energy-Density Electrolytes
Emily Penn ; Antonio Baclig ; Devi Ganapathi , et al. Chem. Mater.,2023,35(14):5255-5266. DOI: 10.1021/acs.chemmater.3c00156
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Abstract: Eutectic electrolytes can attain high concentrations of redox-active species, offering a path toward high energy density redox flow batteries. Here we introduce a new entropically-driven eutectic mixing approach using organic small molecules. By mixing chemically similar redox-active species, we engineer highly concentrated, low viscosity liquids composed almost entirely of redox-active molecules. Using quinones as a model system, we discover a ternary benzoquinone eutectic mixture and a binary naphthoquinone eutectic mixture which have theoretical redox-active electron concentrations of 16.8 and 8.8 M e–, respectively. We investigate compatibility with protic supporting electrolytes and quantify ionic conductivity and viscosity of quinone eutectic electrolytes across multiple states of charge. A binary naphthoquinone eutectic electrolyte with a protic ionic liquid supporting electrolyte (7.1 M e–, theoretical volumetric capacity 188 Ah L–1) achieves a volumetric capacity of 49 Ah L–1 in symmetric static cell cycling. These preliminary results suggest that entropy-driven eutectic mixing is a promising strategy for developing high-energy density flow battery electrolytes.
Purchased from AmBeed: 695-99-8 ; 553-97-9 ; 3602-55-9 ; 84-65-1 ; 288-32-4 ; 130-15-4 ; 2397-59-3 ; 137395-55-2
CAS No. : | 2397-59-3 | MDL No. : | N/A |
Formula : | C14H14O2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | - |
M.W : | 214.26 | Pubchem ID : | - |
Synonyms : |
Signal Word: | Class: | N/A | |
Precautionary Statements: | UN#: | N/A | |
Hazard Statements: | Packing Group: | N/A |