Exploiting cation aggregation in new magnesium amidohaloaluminate electrolytes for magnesium batteries

Abstract

The active species in magnesium electrolytes is regularly assigned as being the thermodynamically stable dinuclear [Mg2Cl3]+ cation. By deliberately targeting other implicated aggregates, their effect on Mg-ion battery performance is easily ascertained.

Modeling of Magnesium Intercalation into Chevrel Phase Mo6S8: Report on Improved Cell Design

“…Disadvantages of CP are its comparatively low specific capacity and potential against Mg metal. However, although many other promising cathode materials have been found in the meantime, CP is still one of the most‐studied cathode materials for magnesium‐ion batteries and often acts as benchmark system [11,14−27] …”

Methodologies for Operando ATR-IR Spectroscopy of Magnesium Battery Electrolytes

“…A key technological challenge impeding the commercialization of Mg batteries lies in the development of suitable electrolytes. Simple inorganic Mg salts in conventional aprotic solvents lack sufficient ionic conductivity and metal plating/stripping kinetics, and so, organomagnesium chemistry has been a topic of intense study in this context. ,,, Early electrolytes comprising alkylmagnesium halide Grignard reagents (e.g., EtMgCl) were found to exhibit insufficient anodic stability, but advances have been made over the last two decades, most recently via the use of magnesium organoaluminate complexes. ,− One example that has found considerable attention is the electrolyte formed from the reaction between Grignard reagent PhMgCl and AlCl 3 in tetrahydrofuran (THF). The active species is believed to have the structure [Mg 2 Cl 3 ·6THF] + [AlPh 4 ] − (Figure ) and so the electrolyte is commonly referred to as the “all-phenyl complex” (APC). , We recently demonstrated that this complex can also be synthesized by a more atom-efficient reaction between Ph 2 Mg and AlCl 3 …”

Atom-efficient synthesis of a benchmark electrolyte for magnesium battery applications

“…One such challenge is the development of suitable electrolytes. 6 The viability of many different types of Mg electrolyte has been tested over the last thirty years, including Grignard reagents, 7 wholly inorganic salts [8][9][10][11] and alkyl/ amido trichloroaluminates [12][13][14] amongst others. Among the currently leading candidates is a magnesium aluminate solution in tetrahydrofuran (THF) known as the 'all-phenyl complex' (APC).…”