[1] In particular, some can suppress oxidative corrosion of an Al current collector without a source of fluoride ion (such as hexafluorophosphate) and enable the use of 5 V lithium-ion battery cathode materials.
(3) Related to #2 is the ability of some superconcentrated electrolytes to allow for reversible intercalation of Li+ ions into graphite in the absence of ethylene carbonate solvent,[5] therefore enabling a new class of safer lithium-ion batteries.
(4) Solvent vapor pressure is lower, thermal stability is higher, and flammability is absent,[1] which contributes to a better battery safety.
[3] (6) In some cases, and contrary to expectations, faster rates of electrode reactions are observed, than in conventional low-salt-concentration electrolytes.
[3] (8) Some studies report, that Li+ transference number in such liquids is close to one, which means, that Li+ concentration gradient between anode and cathode does not develop during the battery's charge and discharge.