2021
DOI: 10.1002/aenm.202100325
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Rethinking the Design of Ionic Conductors Using Meyer–Neldel–Conductivity Plot

Abstract: From the discovery of the first fast ionic conductor silver iodide in the early 20th century to the recent discovery of lithium fast ionic conductors with ionic conductivities surpassing those of liquid electrolytes, high ionic conductivity σ has often been associated with low activation energy Ea following the Arrhenius equation. However, the Meyer–Neldel rule (MNR) indicates that the Ea and prefactor σ0 are correlated, suggesting the relation between the Ea and σ is, in fact, complex. In this perspective, th… Show more

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Cited by 28 publications
(35 citation statements)
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References 79 publications
(117 reference statements)
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“…The higher the activation enthalpy, the higher the pre-factor, which is affected by entropy contributions, attempt frequencies and, in the case of ionic conductivity, also by the effective number of charge carriers. Recently, a similar trend has also been found for LLZO-type conductors [ 71 ] and other compounds such as thiophosphates [ 31 , 72 ]. The semi-empirical relationship seems to be valid at least for the averaged, macroscopic ion transport.…”
Section: Case Studiessupporting
confidence: 75%
“…The higher the activation enthalpy, the higher the pre-factor, which is affected by entropy contributions, attempt frequencies and, in the case of ionic conductivity, also by the effective number of charge carriers. Recently, a similar trend has also been found for LLZO-type conductors [ 71 ] and other compounds such as thiophosphates [ 31 , 72 ]. The semi-empirical relationship seems to be valid at least for the averaged, macroscopic ion transport.…”
Section: Case Studiessupporting
confidence: 75%
“…The importance of k B T iso in guiding the search for new ionic conductor materials has been discussed in detail elsewhere. [35]…”
Section: Proton Conductivity In Perovskites: An Investigation According To Mnrmentioning
confidence: 99%
“…Similarly, the pressure-tuning approach has been proved as a rapid method to determine the Meyer-Neldel energy k B T iso for lithium ionic conductors. [35]…”
Section: Correlation Between Isokinetic Temperature Vibrational Frequency and Proton-phonon Couplingmentioning
confidence: 99%
“…Based on Eq. 7, Gao et al 59 highlighted that the relationship between  and E a depends on the sign of at a…”
Section: Correlation Between Lattice Dynamics and Ionic Transport: Th...mentioning
confidence: 99%