2023
DOI: 10.1021/acsaem.3c01977
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Thermal Conductivities of Lithium-Ion-Conducting Solid Electrolytes

Thorben Böger,
Tim Bernges,
Yuheng Li
et al.

Abstract: Solid electrolytes and solid-state batteries have gathered attention in recent years as a potential alternative to state-of-the-art lithium-ion batteries, given the promised increased energy density and safety following the replacement of flammable organic electrolytes with solids. While ongoing research focuses mainly on improving the ionic conductivities of solid electrolytes, little is known about the thermal transport properties of this material class. This includes fundamental studies of heat capacities a… Show more

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Cited by 4 publications
(3 citation statements)
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“…43 It also is expected that the thermal conductivity of an NCM composite should also decrease with the introduction of Li 6 PS 5 Cl, which is reported to exhibit lower thermal conductivities (∼0.3−0.5 W m −1 K −1 at 20 °C). 41 While the thermal conductivity of the active material-electrolyte composite is low, the thermal conductivity of Li 6 PS 5 Cl is still within the same range as carbonate liquid electrolytes (∼0.4−0.6 W m −1 K −1 ). 43−45 Furthermore, even if NCM and FeS:Li 2 S cathode composites have similar thermal conductivities, there is an inherent advantage from a thermal safety standpoint in that no gaseous decomposition products are expected to form in FeS:Li 2 S unlike the case with NCM.…”
Section: Resultsmentioning
confidence: 98%
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“…43 It also is expected that the thermal conductivity of an NCM composite should also decrease with the introduction of Li 6 PS 5 Cl, which is reported to exhibit lower thermal conductivities (∼0.3−0.5 W m −1 K −1 at 20 °C). 41 While the thermal conductivity of the active material-electrolyte composite is low, the thermal conductivity of Li 6 PS 5 Cl is still within the same range as carbonate liquid electrolytes (∼0.4−0.6 W m −1 K −1 ). 43−45 Furthermore, even if NCM and FeS:Li 2 S cathode composites have similar thermal conductivities, there is an inherent advantage from a thermal safety standpoint in that no gaseous decomposition products are expected to form in FeS:Li 2 S unlike the case with NCM.…”
Section: Resultsmentioning
confidence: 98%
“…The ball-milled FeS:Li 2 S active material demonstrates a higher thermal diffusivity relative to the cathode composite across the entire measured temperature range (−100 to 100 °C). The lower thermal diffusivity exhibited in the cathode composite is supported by the lower thermal diffusivity of the Li 6 PS 5 Cl, relative to FeS:Li 2 S. 41 Based on those thermal diffusivities, thermal conductivities (eq 3) of the active material and cathode composite were calculated based on the specific heat capacities estimated using the Dulong−Petit limit (Figure 6b, see the Supporting Information). The thermal conductivity of the active material (FeS:Li 2 S) is within the range of thermal conductivities reported for calendared carbon-coated NCM622 and NCM811 sheets (∼0.5−1 W m −1 K −1 at 20 °C) 42 and NCM532 electrodes (∼0.5 W m −1 K −1 ).…”
Section: Resultsmentioning
confidence: 99%
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