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Electrochemical Performance of Mg Metal‐Quinone Battery in Chloride‐Free Electrolyte
Author(s) -
Pavčnik Tjaša,
Bitenc Jan,
Pirnat Klemen,
Dominko Robert
Publication year - 2021
Publication title -
batteries and supercaps
Language(s) - English
Resource type - Journals
ISSN - 2566-6223
DOI - 10.1002/batt.202000293
Subject(s) - electrolyte , chloride , cathode , battery (electricity) , electrochemistry , inorganic chemistry , anode , chemistry , metal , materials science , chemical engineering , electrode , organic chemistry , power (physics) , physics , quantum mechanics , engineering
Mg batteries are a promising energy storage system due to the high capacity of the Mg metal anode. However, until recently Mg battery practical application seemed very distant due to corrosive nature of Mg electrolytes and the lack of suitable cathode materials. In this work, we bridge this gap by combining novel chloride‐free Mg electrolyte, Mg perfluorinated pinacolato borate (MgFPB), with quinone based organic cathode. ATR‐IR spectroscopy and complementary energy dispersive X‐ray spectroscopy (EDS) of ex situ cathodes confirm reduction of carbonyl group during discharge an its preferred coordination with Mg 2+ cations, although monovalent not fully dissociated MgFPB + cation pairs are detected as well. Mediocre capacity retention of PAQS/CNTs is improved through the use of phenanthrenequinone based polymer (PFQ/rGO). The study demonstrates the promising performance of organic compounds in chloride‐free electrolytes and points towards future steps on the path towards practical Mg metal organic batteries.