Pyrrolidinium and Imidazolium-Based Ionic Liquids as Electrolytes for Na_0.67Ni_0.33Mn_0.67O₂ Positive Electrode for Sodium-Ion Batteries.

ABSTRACT: In this paper, the electrochemical performance of two nitrogen-based ionic liquids (ILs), 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPyr-TFSI) and 2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide (BMMI-TFSI), with different concentrations of NaTFSI, as electrolytes for the Na_0.67Ni_0.33Mn_0.67O₂ (NNM) positive electrode for sodium-ion batteries (SIBs) were compared with the conventional 1.0 mol L^-1 NaClO₄ in carbonate electrolyte. Moreover, the influence of salt concentration on the physicochemical properties of both ILs was evaluated. Amidst the neat ILs, BMPyr-TFSI showed better transport properties than BMMI-TFSI, whereas, for NaTFSI-mixtures, adding salt was detrimental to the ILs' properti

SUBMITTER: Domingues LS 

PROVIDER: S-EPMC12908124 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature