Ratajczak P, Bachetzky C, Wang Z, Chojnacka A, Fulik N, Yambou EP, Pourhosseini SEM, Brunner E, Beguin F (2022)
Publication Type: Journal article
Publication year: 2022
DOI: 10.1039/d1ta10367a
Recently, it was shown that the applicability of ionic liquids (ILs) can be extended to lower temperatures by their confinement in porous matrices. However, when considering the high-power output required for energy storage systems as electrical double-layer capacitors, it is very important to obtain information about the low temperature mobility of ions confined in porous electrodes. DSC and 1H NMR are herein applied to analyze the phase transitions and mobility of [EMIm+][FSI−] confined in a microporous carbon and two silica templated mesoporous carbons of different mesopore size. In the microporous carbon, due to the strong interactions of the IL with the pore walls, the mobility of ions is already reduced at room temperature, and it only slightly declines upon cooling. The IL confined in mesopores appears in a state closer to the bulk, exhibiting freezing/melting phase transitions downshifted by about 30 K as compared to the neat IL. As referred to the neat IL, freezing in mesopores occurs over a temperature range of ∼10 K, whereas melting is extended to more than 20 K for L
APA:
Ratajczak, P., Bachetzky, C., Wang, Z., Chojnacka, A., Fulik, N., Yambou, E.P.,... Beguin, F. (2022). Mobility and phase transitions of the [EMIm+][FSI−] ionic liquid confined in micro- and mesoporous carbons. Journal of Materials Chemistry A. https://doi.org/10.1039/d1ta10367a
MLA:
Ratajczak, Paula, et al. "Mobility and phase transitions of the [EMIm+][FSI−] ionic liquid confined in micro- and mesoporous carbons." Journal of Materials Chemistry A (2022).
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