The search for safer next-generation lithium-ion batteries(LIBs)has driven significant research on non-toxic,non-flammable solid electrolytes.However,their electrochemical performance often falls short.This work prese...The search for safer next-generation lithium-ion batteries(LIBs)has driven significant research on non-toxic,non-flammable solid electrolytes.However,their electrochemical performance often falls short.This work presents a simple,one-step photopolymerization process for synthesizing biphasic liquid–solid ionogel electrolytes using acrylic acid monomer and P_(111i4)FSI ionic liquid.We investigated the impact of lithium salt concentration and temperature on ion diffusion,particularly lithium-ion(Li^(+))mobility,within these ionogels.Pulsed-field gradient nuclear magnetic resonance(PFG-NMR)revealed enhanced Li^(+)diffusion in the acrylic acid(AA)-based ionogels compared to their non-confined ionic liquid counterparts.Remarkably,Li^(+)diffusion remained favorable in the ionogels regardless of salt concentration.These AA-based ionogels demonstrate very good ionic conductivity(>1 mS cm^(-1) at room temperature)and a wide electrochemical window(up to 5.3 V vs Li^(+)/Li^(0)).These findings suggest significant promise for AA-based ionogels as polymer solid electrolytes in future solid-state battery applications.展开更多
The electrochemical reversibility of Mg in hybrid electrolytes based on mixtures of ionic liquid and glyme based organic solvents was investigated for applications in rechargeable magnesium batteries(RMBs). The electr...The electrochemical reversibility of Mg in hybrid electrolytes based on mixtures of ionic liquid and glyme based organic solvents was investigated for applications in rechargeable magnesium batteries(RMBs). The electrolytes demonstrate reversible reduction and oxidation of Mg only after being pre-treated with the dehydrating agent, magnesium borohydride, Mg[BH_4]_2, highlighting the importance of removing water in Mg based electrolytes. The addition magnesium di[bis(trifluoromethanesulfonyl)imide](Mg[TFSI]_2)(0.3 M) to N-butyl-n-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide [C4 mpyr][TFSI]/tetraglyme at a mole ratio of 1:2 showed stable CV cycling over almost 300 cycles while scanning electron microscopy(SEM) and X-ray diffraction(XRD) confirmed Mg deposition, showing non-dendritic morphology and a well-aligned growth. Further thermogravimetric analysis(TGA) demonstrated a mass retention of 79% at 250℃ for this electrolyte suggesting that the presence of the ionic liquid increases thermal stability substantially making these hybrid electrolytes compatible for RMBs.展开更多
基金funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Actions COFUND—Grant Agreement No:945357.
文摘The search for safer next-generation lithium-ion batteries(LIBs)has driven significant research on non-toxic,non-flammable solid electrolytes.However,their electrochemical performance often falls short.This work presents a simple,one-step photopolymerization process for synthesizing biphasic liquid–solid ionogel electrolytes using acrylic acid monomer and P_(111i4)FSI ionic liquid.We investigated the impact of lithium salt concentration and temperature on ion diffusion,particularly lithium-ion(Li^(+))mobility,within these ionogels.Pulsed-field gradient nuclear magnetic resonance(PFG-NMR)revealed enhanced Li^(+)diffusion in the acrylic acid(AA)-based ionogels compared to their non-confined ionic liquid counterparts.Remarkably,Li^(+)diffusion remained favorable in the ionogels regardless of salt concentration.These AA-based ionogels demonstrate very good ionic conductivity(>1 mS cm^(-1) at room temperature)and a wide electrochemical window(up to 5.3 V vs Li^(+)/Li^(0)).These findings suggest significant promise for AA-based ionogels as polymer solid electrolytes in future solid-state battery applications.
基金support from the Australian Research Council for his Australian Laureate Fellowship
文摘The electrochemical reversibility of Mg in hybrid electrolytes based on mixtures of ionic liquid and glyme based organic solvents was investigated for applications in rechargeable magnesium batteries(RMBs). The electrolytes demonstrate reversible reduction and oxidation of Mg only after being pre-treated with the dehydrating agent, magnesium borohydride, Mg[BH_4]_2, highlighting the importance of removing water in Mg based electrolytes. The addition magnesium di[bis(trifluoromethanesulfonyl)imide](Mg[TFSI]_2)(0.3 M) to N-butyl-n-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide [C4 mpyr][TFSI]/tetraglyme at a mole ratio of 1:2 showed stable CV cycling over almost 300 cycles while scanning electron microscopy(SEM) and X-ray diffraction(XRD) confirmed Mg deposition, showing non-dendritic morphology and a well-aligned growth. Further thermogravimetric analysis(TGA) demonstrated a mass retention of 79% at 250℃ for this electrolyte suggesting that the presence of the ionic liquid increases thermal stability substantially making these hybrid electrolytes compatible for RMBs.
