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首页> 外文期刊>ChemElectroChem >Ionic Conductivity of Ruddlesden-Popper Layered Perovskites (Li2SrTa2O7, Li2SrNb2O7, and Li2CaTa2O7) with Poly (ethylene oxide) as a Composite Solid Electrolyte
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Ionic Conductivity of Ruddlesden-Popper Layered Perovskites (Li2SrTa2O7, Li2SrNb2O7, and Li2CaTa2O7) with Poly (ethylene oxide) as a Composite Solid Electrolyte

机译：具有聚（环氧乙烷）作为复合固体电解质的聚（环氧乙烷）的Ruddlesden-popper层状钙酸盐（Li2SRTA2O7，Li2SRNB2O7和Li2Cata2O7）的离子电导率

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We report the ionic conductivity studies of three different Ruddlesden-Popper layered perovskite (RP-LP) materials (Li2SrTa2O7, Li2SrNb2O7, and Li2CaTa2O7) in composites with poly (ethylene oxide) (PEO). For the first time, the lithium-ion conduction pathway in the RP-LP materials, of n= 2 in A(n)A'B-n O3n+1 general crystal structure, have been studied by using bond valence sum mapping. The results show a two-dimensional lithium-ion pathway. The temperature dependence of the conductivity is modelled by using a Vogel Tamman Fulcher (VTF)-type relationship for PEO RP-LP and pure PEO samples. The PEO RP-LP composites deliver ionic conductivities in the range of 3.32 to 4.09x10(-06) sigma cm(-2) at 80 degrees C, and their corresponding activation energies range from 6.37 to 7.01 kJ mol(-1) at the calculated temperature slope range of 50 to 80 degrees C. They also deliver appreciable lithium transference numbers in the range of 0.20 to 0.58 at 30 C and an excellent wide potential window stability of 4 V.
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