Emerging electrolytes with fluorinated solvents for rechargeable lithium-based batteries

Abstract

This review provides a detailed analysis and summary of the design principles and strategies for the synthesis of fluorinated electrolyte solvents for Li-based batteries.

Directing (110) Oriented Lithium Deposition through High‐flux Solid Electrolyte Interphase for Dendrite‐free Lithium Metal Batteries

“…[12] In contrast, the advanced SEI with high and uniform Li + transport ability can dramatically promote Li + surface migration (Supplementary Figure S2a). [13] In this direct, to realize Li (110) orientation, the SEI not only requires superior lithiophilic organic components (such as Si-containing materials) to realize fast and even Li + surface transport on SEI, but also needs uniformly distributed inorganic components (such as LiF) [14] to maintain the high structure stability for suppressing Li dendrite formation and high ionic conductivity at the grain boundary for fast Li + diffusion. [15] We construct a quickly formed superior SEI via a simple CF 3 Si(CH 3 ) 3 solvent-dropping method.…”

Recent progress in nonflammable electrolytes and cell design for safe Li-ion batteries

“…Fluorinated electrolytes (Fig. 6a) are synthesized by substituting the H atom with strong electron-withdrawing F, which can decrease the LUMO level to enable a preferential decomposition to a LiF dominant SEI with high stability and Young's modulus 79,80 and decrease the HOMO to facilitate the stable operation of the high voltage cathode (Fig. 6b).…”

Lithium metal batteries with in situ copolymerized fluorinated polyether electrolytes

“…11,12 However, the low oxidative stability (4 V) of ether-based electrolytes is a major challenge, 13,14 though electrolyte fluorination is an effective strategy to improve the oxidative stability. 15–17 The presence of fluorine can promote the formation of the SEI film on the electrode surface, whereby a strong SEI can block electron transfer. 18–20 Nevertheless, most fluorinated solvents suffer from a decline in Li-ion conductivity due to their weakened Li-ion solvation.…”