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Conductivity of liquid lithium electrolytes with dispersed mesoporous silica particles

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Title: Conductivity of liquid lithium electrolytes with dispersed mesoporous silica particles
Authors: Sann, K.1, Roggenbuck, J.2, Krawczyk, N.1, Buschmann, H.1, Luerßen, B.1, Fröba, M.2 froeba@chemie.uni-hamburg.de, Janek, J.1 juergen.janek@phys.chemie.uni-giessen.de
Source: Electrochimica Acta. Jan2012, Vol. 60, p1-6. 6p.
Subjects: Electric conductivity, Liquid metals, Electrolytes, Lithium, Dispersion (Chemistry), Mesoporous materials, Silica, Temperature effect
Abstract: Abstract: The electrical conductivity of disperse electrolytes was systematically measured as a function of temperature (0°C to 60°C) and filler content for different types of fillers with a range of pore geometry, pore structure and specific surface area. As fillers mesoporous silicas SBA-15, MCM-41 and KIT-6 with pore ranges between 3nm and 15nm were dispersed in commercially available liquid lithium electrolytes. As electrolytes 1M of lithium hexafluorophosphate (LiPF6) in a mixture of ethylene carbonate (EC) and diethylene carbonate (DEC) at the ratio 3:7 (wt/wt) and the same solvent mixture with 0.96M lithium bis(trifluoromethanesulfon)imide (LiTFSI) were used. No conductivity enhancement could be observed, but with respect to safety aspects the highly viscous disperse pastes might be useful. The conductivity decrease varied considerably for the different fillers. [Copyright &y& Elsevier]
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Database: Engineering Source
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Abstract:Abstract: The electrical conductivity of disperse electrolytes was systematically measured as a function of temperature (0°C to 60°C) and filler content for different types of fillers with a range of pore geometry, pore structure and specific surface area. As fillers mesoporous silicas SBA-15, MCM-41 and KIT-6 with pore ranges between 3nm and 15nm were dispersed in commercially available liquid lithium electrolytes. As electrolytes 1M of lithium hexafluorophosphate (LiPF6) in a mixture of ethylene carbonate (EC) and diethylene carbonate (DEC) at the ratio 3:7 (wt/wt) and the same solvent mixture with 0.96M lithium bis(trifluoromethanesulfon)imide (LiTFSI) were used. No conductivity enhancement could be observed, but with respect to safety aspects the highly viscous disperse pastes might be useful. The conductivity decrease varied considerably for the different fillers. [Copyright &y& Elsevier]
ISSN:00134686
DOI:10.1016/j.electacta.2011.10.024