Battelle Memorial Institute

Tianbiao Liu

Jun Liu

Yuyan Shao

Guosheng Li

Bin Li

Vincent L Sprenkle

Wei Wang

Zimin Nie

Xiaoliang Wei

An aqueous redox flow battery system includes an aqueous catholyte and an aqueous anolyte. The aqueous catholyte may comprise (i) an optionally substituted thiourea or a nitroxyl radical compound and (ii) a catholyte aqueous supporting solution. The aqueous anolyte may comprise (i) metal cations or a viologen compound and (ii) an anolyte aqueous supporting solution. The catholyte aqueous supporting solution and the anolyte aqueous supporting solution independently may comprise (i) a proton source, (ii) a halide source, or (iii) a proton source and a halide source.

Aqueous electrolytes for redox flow battery systems

Electrolytes for Mg-based energy storage devices can be formed from non-nucleophilic Mgsources to provide outstanding electrochemical performance and improved electrophilic susceptibility compared to electrolytes employing nucleophilic sources. The instant electrolytes are characterized by high oxidation stability (up to 3.4 V vs Mg), improved electrophile compatibility and electrochemical reversibility (up to 100% coulombic efficiency). Synthesis of the Mgelectrolytes utilizes inexpensive and safe magnesium dihalides as non-nucleophilic Mgsources in combination with Lewis acids, MRX(for 3&#x2267;a&#x2267;1). Furthermore, addition of free-halide-anion donors can improve the coulombic efficiency of Mg electrolytes from nucleophilic or non-nucleophilic Mgsources.

Magnesium-based energy storage systems and methods having improved electrolytes

Embodiments of a solid-state electrolyte comprising magnesium borohydride, polyethylene oxide, and optionally a Group IIA or transition metal oxide are disclosed. The solid-state electrolyte may be a thin film comprising a dispersion of magnesium borohydride and magnesium oxide nanoparticles in polyethylene oxide. Rechargeable magnesium batteries including the disclosed solid-state electrolyte may have a coulombic efficiency &#x2267;95% and exhibit cycling stability for at least 50 cycles.

Solid-state rechargeable magnesium battery

Growing community of inventors

Richland, WA, United States of America

Tianbiao Liu