{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Domingues LS"],"funding":["Funda??o de Amparo ? Pesquisa do Estado de S?o Paulo","Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior"],"pagination":["1915-1932"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12908124"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["130(6)"],"pubmed_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<sub>0.67</sub>Ni<sub>0.33</sub>Mn<sub>0.67</sub>O<sub>2</sub> (NNM) positive electrode for sodium-ion batteries (SIBs) were compared with the conventional 1.0 mol L<sup>-1</sup> NaClO<sub>4</sub> 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' properties. The poorer transport properties of the ILs compared to those of the carbonate electrolyte negatively impact the NNM electrode performance. At C/10, the highest discharge capacity obtained in IL mixtures was 40 mA h g<sup>-1</sup> for BMPyr-TFSI with 0.5 mol L<sup>-1</sup> of NaTFSI, compared to 59 mA h g<sup>-1</sup> for NNM in NaClO<sub>4</sub> electrolyte. Lowering the current density improved the performance of NNM in both BMPyr and BMMI-based mixtures, achieving specific capacities and Coulombic efficiencies above 53 mA h g<sup>-1</sup> and 96%, respectively, at C/50. This approach has proven effective in overcoming the kinetic limitations due to the poorer transport properties displayed by ILs, encouraging the implementation of these electrolytes in SIBs."],"journal":["The journal of physical chemistry. B"],"pubmed_title":["Pyrrolidinium and Imidazolium-Based Ionic Liquids as Electrolytes for Na&lt;sub&gt;0.67&lt;/sub&gt;Ni&lt;sub&gt;0.33&lt;/sub&gt;Mn&lt;sub&gt;0.67&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; Positive Electrode for Sodium-Ion Batteries."],"pmcid":["PMC12908124"],"funding_grant_id":["001","88887.484841/2020-00","2021/00675-4","2019/26309-4"],"pubmed_authors":["Martins VL","Torresi RM","de Melo HG","Domingues LS","Turmine M","Vivier V"],"additional_accession":[]},"is_claimable":false,"name":"Pyrrolidinium and Imidazolium-Based Ionic Liquids as Electrolytes for Na&lt;sub&gt;0.67&lt;/sub&gt;Ni&lt;sub&gt;0.33&lt;/sub&gt;Mn&lt;sub&gt;0.67&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; Positive Electrode for Sodium-Ion Batteries.","description":"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<sub>0.67</sub>Ni<sub>0.33</sub>Mn<sub>0.67</sub>O<sub>2</sub> (NNM) positive electrode for sodium-ion batteries (SIBs) were compared with the conventional 1.0 mol L<sup>-1</sup> NaClO<sub>4</sub> 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' properties. The poorer transport properties of the ILs compared to those of the carbonate electrolyte negatively impact the NNM electrode performance. At C/10, the highest discharge capacity obtained in IL mixtures was 40 mA h g<sup>-1</sup> for BMPyr-TFSI with 0.5 mol L<sup>-1</sup> of NaTFSI, compared to 59 mA h g<sup>-1</sup> for NNM in NaClO<sub>4</sub> electrolyte. Lowering the current density improved the performance of NNM in both BMPyr and BMMI-based mixtures, achieving specific capacities and Coulombic efficiencies above 53 mA h g<sup>-1</sup> and 96%, respectively, at C/50. This approach has proven effective in overcoming the kinetic limitations due to the poorer transport properties displayed by ILs, encouraging the implementation of these electrolytes in SIBs.","dates":{"release":"2026-01-01T00:00:00Z","publication":"2026 Feb","modification":"2026-07-07T03:10:01.215Z","creation":"2026-07-07T03:08:13.005Z"},"accession":"S-EPMC12908124","cross_references":{"pubmed":["41604695"],"doi":["10.1021/acs.jpcb.5c07871"]}}