title: Magnesocene-Based Electrolytes: A New Class of Electrolytes for Magnesium Batteries.
abstract: Unlike ferrocene, bis(η5-cyclopentadienyl)magnesium (magnesocene, MgCp2) is slightly dissociated in solvents, such as ethers, resulting in electrolyte solutions with low conductivity. MgCp2/tetrahydrofuran solutions make possible reversible magnesium plating and stripping with low over-potentials for many cycles. The Mg deposits appear with a cauliflower-like morphology. IR and NMR spectroscopy confirm that the electrolyte is stable and not decomposed during prolonged cycling. The anodic stability limit is in the range of 1.5 V (at platinum) and 1.8 V versus Mg/Mg2+(at stainless steel), which may be sufficient for low-voltage cathode materials. MgCp2is a first example of a completely new class of halide-free electrolytes, which may open up a new research direction for future magnesium metal and magnesium-ion batteries.
authors: ZSW-Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, Helmholtzstraße 8, 89081, Ulm, Germany.
authors: Rainer
authors: R
authors: Schwarz
authors: ZSW-Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, Helmholtzstraße 8, 89081, Ulm, Germany.
authors: Marijana
authors: M
authors: Pejic
authors: ZSW-Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, Helmholtzstraße 8, 89081, Ulm, Germany.
authors: Philipp
authors: P
authors: Fischer
authors: ZSW-Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, Helmholtzstraße 8, 89081, Ulm, Germany.
authors: Mario
authors: M
authors: Marinaro
authors: ZSW-Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, Helmholtzstraße 8, 89081, Ulm, Germany.
authors: Ludwig
authors: L
authors: Jörissen
authors: ZSW-Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg, Helmholtzstraße 8, 89081, Ulm, Germany.
authors: Mario
authors: 0000-0003-1022-1598
authors: M
authors: Wachtler
keywords: electrochemistry; electrolytes; magnesium batteries; magnesocene