Electrochemistry Communications
Electrochemistry Communications
5 years ago

Strong anion receptor-assisted boron-based Mg electrolyte with wide electrochemical window and non-nucleophilic characteristic

Strong anion receptor-assisted boron-based Mg electrolyte with wide electrochemical window and non-nucleophilic characteristic
Herein we present a strong anion receptor-assisted Mg-ion electrolyte, which is synthesized from tris(2H-hexafluoroisopropyl) borate (THFPB) and MgO in 1,2-dimethoxyethane (DME). The as-prepared borate magnesium oxide complex (BMOC) electrolyte delivers exceptional electrochemical performances, including extremely high anodic stability (up to 4.2V vs. Mg), non-corrosivity to stainless steel and aluminium foils, and reasonable ionic conductivity of 1.74×10−4 Scm−1. In addition, by virtue of the non-nucleophilic characteristic of the BMOC electrolyte, S||BMOC||Mg cells have been assembled, which show a high stable discharge capacity of 1030mAhg−1 for 15cycles and one well-defined voltage plateau of ≈1.1V vs. Mg, yielding a desirable energy density beyond 1100Whkg−1 based on the weight of sulfur in cathodes.

Publisher URL: www.sciencedirect.com/science

DOI: S1388248117302473

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