In-situ measurement of the ionic liquids based electrolytes absorption within 1D Carbon NanoTube membrane
We recently found that ionic liquid based electrolytes confined in 1D carbon nanotube (CNT) membranes show a drastic increase of their ionic conductivity (thus the instant power of batteries). Compared to the same electrolytes in bulk, we indeed report conductivity gains by a factor up to 50 upon macroscopic 1D CNT confinement. Up to now, we haven’t be able to characterize the IL absorption within the CNT membrane (homogeneous filling ? micro-porosity ? electrolyte within the polymer matrix ?). To use the CNT membranes as a battery separator we need to address this point. We propose here to measure in-situ the absorption of an IL based electrolytes within the CNT membrane and check its homogeneity using X-ray and Neutron imaging. First, we will acquire images of the empty membrane (deuterated polystyrene + empty CNT), then deposit a drop of a hydrogenated IL charged with CsTFSI salt (to maximise the neutron and X-ray absorption) and acquire images during 1h. We should be able to follow the absorption front while the IL fills the CNT by capillarity. Additionally, we plan to perform combined X-ray and neutron tomography to get information in 3D. We apply for 1 day on NeXT.
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BERROD Quentin; MODESTO Nino; PINCHART Camille and TENGATTINI Alessandro. (2021). In-situ measurement of the ionic liquids based electrolytes absorption within 1D Carbon NanoTube membrane. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.EASY-758
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