The use of deuterated ethyl acetate in highly concentrated electrolyte as a low-cost solvent for in situ neutron diffraction measurements of Li-ion battery electrodes

Effect of LiPF6 concentration in Li[Ni0.4Mn0.4Co0.2]O2/graphite pouch cells operated at 4.5 V

“…Yoshida et al [21] also showed that the atypically large salt concentration increased the oxidative stability of glyme solvents. Similarly, Petibon et al showed that NMC(442)/graphite cells with ester based electrolytes and large LiFSi concentration cycle quite well up to 4.4 V [22] and 4.7 V [23]. This change of reactivity was assigned to a peculiar solution structure [20,19], similarly to the findings of Nie et al [16].…”

In-Situ Neutron Studies of Electrodes for Li-Ion Batteries Using a Deuterated Electrolyte: LiCoO2as a Case Study

“…In this sense, a low-cost deuterated ethyl acetate based electrolyte suitable for in-situ neutron diffraction has been reported, showing comparable electrochemical performance and signalto-noise ratio of neutron diffraction patterns to more expensive conventional deuterated electrolytes [24]. Most importantly, the electrochemical performance of the in-situ cell should be similar to that of the real (commercial) battery, so that the structural information extracted can be directly compared to that found within the technological applications.…”

Structural evolution of mixed valent (V3+/V4+) and V4+ sodium vanadium fluorophosphates as cathodes in sodium-ion batteries: comparisons, overcharging and mid-term cycling

“…It may be possible to try using highly concentrated electrolyte solutions[27][28][29] to achieve these voltages in sodium-ion batteries in order to determine the mechanism at 5.3 V in the future. It should be noted that the computational calculations suggest that the V 4+ can be further desodiated to 5.3 V 13 but these voltages require specialised electrolytes and are not easily accessible at this stage.…”