Physical and electrochemical properties of lithium bis(oxalate)borate

By Swiderska-Mocek, Agnieszka; Naparstek, Dominika
Published in Electrochimica Acta NULL 2016

Abstract

Abstract A lithium bis(oxalate)borate (LiBOB) salt in many of the common organic solvents (cyclic and linear carbonates, ionic liquid, sulfolane and gamma-butyrolactone) were tested as electrolytes for Li-ion batteries. These electrolytes were obtained by dissolution of LiBOB in sulfolane and in a mixture of propylene carbonate and ethylene carbonate (PC:EC (1:1 wt)); propylene carbonate and dimethyl carbonate (PC:DMC (1:1 wt)); N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulphonyl)imide and {PC} (MePrPyrNTf2:PC (2:1 wt)); gamma-butyrolactone and vinylene carbonate (GBL:VC (9:1 wt)). Such properties of the novel electrolyte systems as flammability, solubility, conductivity and electrochemical stability were investigated. The resulting electrolytes have good cathode and anode stability, high conductivity (almost 6 mS cm?1 for 0.3 M LiBOB in MePrPyrNTf2:PC (2:1 wt)) and some of them are practically non-flammable (the flash point above 164

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