Molecular Relaxations in Magnesium Polymer Electrolytes via GHz Broadband Electrical Spectroscopy

GHz broadband electrical spectroscopy (G‐BES) is adopted to investigate the molecular relaxations and interactions occurring within the system in an oxygen‐ and water‐free atmosphere in the 300 kHz–20 GHz and −40 to 250 °C frequency and temperature ranges, respectively. A new electrolyte for magnesium secondary batteries that can transfer magnesium ions efficiently is presented. This electrolyte is based on polyethylene glycol 400 and a polymeric form of δ‐MgCl2. The information obtained by G‐BES is crucial for studying the conduction mechanism of these new electrolytes. Setting in motion: An electrolyte that can transfer magnesium ions efficiently is presented. This electrolyte is based on polyethylene glycol 400 and a polymeric form of the δ‐MgCl2 magnesium salt. GHz broadband electrical spectroscopy (G‐BES) is used to investigate the molecular relaxations and the interactions occurring within the system. The information obtained by G‐BES is used in the study of the conduction mechanism.