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| 1 | A highly concentrated vanadium protic ionic liquid electrolyte for the vanadium redox flow battery显示文摘A protic ionic liquid is designed and implemented for the first time as a solvent for a high energy density vanadium redox flow battery.Despite being less conductive than standa rd aqueous electrolytes,it is thermally stable on a 100 ℃ temperature window,chemically stable for at least 60 days,equally viscous and dense with typical aqueous solvents and most importantly able to solubilize to 6 mol L^(-1) vanadium sulfate,thus increasing the VRFB energy density by a factor of 2.5.Electrochemical measurements revealed quasi-reversible redox transitions for both catholyte and anolyte at 25 ℃ while a proof-of-concept redox flow cell with the proposed electrolyte was tested for a total of 150 cycles at 25 ℃,showing an open circuit potential of 1.39 V and energy and coulombic efficiencies of 65% and 93%,respectively.What’s more,the battery can be equally cycled at 45℃ showing good thermal stability.This study underlines a new route to improve the energy-to-volume ratio of energy storage system. | Georgios Nikiforidis Amal Belhcen Mérièm Anouti | 2021 | Journal of Energy Chemistry2021，30，6： | 4 |
| 2 | Volumetric properties,viscosity and refractive index of the protic ionic liquid,pyrro-lidinium octanoate,in molecular solvents显示文摘 | ANOUTI M VIGEANT A JACQUEMIN J | 2010 | J Chem Thermodynamics2010，42，7： | 1 |
| 3 | 查看详情显示文摘 | Anouti M Caillon-Caravanier M Dridi Y Jacquemin J Hardacre C Lemordant D | | 0，，： | 1 |
| 4 | Solubilization of SEI lithium salts in alkylcarbonate solvents 显示文摘 | Jones J Anouti M Caillon-Caravannier M | 2011 | Fluid Phase Equilibria2011，305，2： | 1 |
| 5 | Ionic Liquids Based on 1-Aza-bicyclo[2,2,2]octane (Quinuclidine) Salts:Synthesis and Physicochemical Properties显示文摘 | Kazock J Y Taggougui M Anouti M | | 0，，： | 1 |
| 6 | Volumetric properties,viscosity and refractive index of the protic ionic liquid,pyr-rolidinium octanoate,in molecular solvents显示文摘 | ANOUTI M VIGEANT A JACQUEMIN J | 2010 | Journal of Chemical Thermodynamics2010，42，7： | 1 |
| 7 | Volumetric properties, viscosity and refractive index of the protic ionic liquid, pyrrolidinium octanoate, in molecular solvents 显示文摘 | ANOUTI M VIGEANT A JACQUEMIN J | 2010 | Journal of Chemical Thermodynamics2010，42，7： | 1 |
| 8 | Volumetric properties, viscosity and refractive index of the protic ionic liquid, pyr-rolidinium octanoate, in molecular solvents 显示文摘 | ANOUTI M VIGEANT A JACQUEMIN J | 2010 | Journal of Chemical Thermodynamics2010，42，7： | 1 |
| 9 | Effect of fluorinated additives or co-solvent on performances of graphite//LiMn2O4 cells cycled at high potential显示文摘Herein,a comprehensive study of electrochemical performances of the combined effect of fluorinated additives;fluoroethylene carbonate(FEC);and tris(2,2,2-trifluoroethyl) phosphite(TTFP) or the 2,2,2-trifluoroethyl methyl carbonate(TFEMC) as co-solvent,on Graphite//LiMn2O4 cells cycled at high potential is reported.On one side,each additive has a specific function,the FEC is dedicated to the negative electrode and the TTFP to the opposite one.The electrolyte mixture with(4% FEC+1% TTFP) additive has shown the best ability to reduce fading of the LiMn2O4 electrode,especially at high rates.On the other side,by studying the comparative thermal and transport properties of the formulated electrolytes with different proportions of TFEMC,we demonstrate that the difference in charge distribution of EMC and TFEMC molecules induced by the presence of fluorine atoms,modifies the solvation model of the Li+cation,and changes its behavior at the CEI interface and impact strongly the electrochemical performances.Finally,the EIS investigation of the LMO/electrolyte interfaces in the presence of TFEMC demonstrates that despite a spontaneous chemical reactivity of the TFEMC at the cathode interface over time,the conductive and good quality CEI is formed,which positively impact the cyclability.This study shows that against LMO surface phenomena,the combination in adequate proportions of fluorinated additives or solvent can be a solution not only to avoid the oxidative reactivity of LMO-cathode,but also to prevent its harmful consequences on the Li-metal or graphite-anode by controlling the solvation of lithium-ion. | Benjamin Flamme Darius JYeadon Satyajit Phadke Mérièm Anouti | 2021 | Journal of Energy Chemistry2021，30，1： | 1 |
| 10 | Volumetric properties,viscosity and refractive index of the protic ionic liquid,pyrrolidinium octanoate,in molecular solvents显示文摘 | Anouti M Vigeant A Jacquemin J | 2010 | J Chem Thermodyn2010，42，7： | 1 |
| 11 | Volumetric properties,viscosities,and isobaric heat capacities of imidazolium octanoate protic ionic liquid in molecular solvents显示文摘 | Anouti M Jacquemin J Lemordant D | 2010 | J Chem Eng Data2010，55，12： | 1 |
| 12 | Small dissymmetry, yet large effects on the transport propertiesof electrolytes based on imide salts: Consequences on performancein Li-ion batteries显示文摘To gain better insight into the influence of the anion size and symmetry on the transport properties and thermal stability of an electrolyte based on lithium(fluorosulfonyl)(trifluoromethanesulfonyl)-imide(FTFSI)salt,we performed the physical and electrochemical characterization of an electrolyte based on FTFSI incorporated in standard binary(3 EC/7 EMC)and ternary(EC/PC/3 DMC)alkylcarbonate mixtures.By applying the Jones-Dole-Kaminsky(JDK),Eyring and Arrhenius empirical models to the electrolyte viscosity we show that the activation enthalpy and entropy energy barriers(ΔH≠,ΔS≠)for viscous flow are between 12 and 15 kJ·mol^(-1).They are strongly dependent on the solvent nature and are significantly lower than their symmetric anions LiFSI and LiTFSI(19-20 kJ·mol^(-1))in the binary mixture.Furthermore,the hydrodynamic radius,rs,calculated by JDK,and the ionicity behavior illustrated by the Walden role,showed that the FTFSI anion is outside the solvation sphere(rs>0.6 nm)which is smaller in the case of an EC/EMC solvent base.In the 3 EC/7 EMC solvent mixture,LiFTFSI is less conductive than in the ternary mixture i.e.,σ_(max)=8.9 mS cm^(-1) at C_(max)=1.1 mol L^(-1) for 3 EC/7 EMC and,σ_(max)=10.5 mS cm^(-1) at max=0.7 mol L^(-1) for EC/PC/3 DMC,due to a strong solvation and a greater association of FTFSI ions in the binary solvent mixture.The thermal stability of FTFSI based electrolytes was determined by the shift of the evaporation temperature of the volatile solvents(DMC,EMC)in the presence of salt,towards the higher temperatures.This feature is visible on the thermograms obtained by DSC both with the liquid electrolyte and with charged LMO cathodes in presence of electrolytes.The consequences of these properties on the electrochemical behavior of a graphite(Gr)half-cell,a lithium metal(Li)anode and a manganese lithium oxide(LMO)cathode demonstrated on the one hand the formation of a thick solid electrolyte interphase(SEI)on graphite that consumed a significant amount of lithium i.e.,18%of total capacity of the first charge.Furthermore,LiFTFSI delivered 95%of the initial capacity C=360 mAh g^(-1) at C/10 with EC/PC/3 DMC versus 91%when it was combined with 3 EC/7 EMC C=348 mAh g^(-1),while the capacities obtained for LiTFSI in EC/PC/3 DMC were the lowest(C=275 mAh g^(-1))compared to those of the other salts.After 10 cycles,the capacity loss at C/20 is<2%for LiFSI and LiFTFSI with the two solvent mixtures.On the other hand,manganese dissolution from LMO as well as current collector corrosion were confirmed by post-mortem examination of opened coin cells.The incompatibility of the LMO cathode with an electrolyte based on FTFSI was confirmed by the position of the decomposition peak of charged LMO in contact with this electrolyte observed by DSC These results demonstrate that the nature of the anion as well as the composition of the solvent considerably influence the performance of imide-based lithium salts both on the anode,but especially on the high voltage cathode. | Joseph Chidiac Laure Timperman Mérièm Anouti | 2022 | Journal of Energy Chemistry2022，31，2： | 0 |
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