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

Title
Ionic Conductivity of Ruddlesden-Popper Layered Perovskites (Li2SrTa2O7, Li2SrNb2O7, and Li2CaTa2O7) with Poly (ethylene oxide) as a Composite Solid Electrolyte
Authors
Ramakrishnan, PrakashKwak, Hun HoCho, Yoon HoKim, Jae Hyeon
DGIST Authors
Ramakrishnan, Prakash; Kwak, Hun Ho; Cho, Yoon Ho; Kim, Jae Hyeon
Issue Date
2018-05
Citation
ChemElectroChem, 5(9), 1265-1271
Type
Article
Article Type
Article
Author Keywords
Ionic conductivityLayered perovskiteRuddlesden-PopperSolid-state lithium batteriesVTF relationship
ISSN
2196-0216
Abstract
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 AnA'BnO3n+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 4.09×10-06σcm-2 at 80°C, and their corresponding activation energies range from 6.37 to 7.01kJmol-1 at the calculated temperature slope range of 50 to 80°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 4V. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI
http://hdl.handle.net/20.500.11750/6087
DOI
10.1002/celc.201800017
Publisher
Wiley-VCH Verlag
Related Researcher
  • Author Ramakrishnan, Prakash  
  • Research Interests Li-ion & solid state batteries; hybrid capacitors/ li-ion capacitors; metal-air-batteries; supercapacitors
Files:
There are no files associated with this item.
Collection:
Smart Textile Convergence Research Group1. Journal Articles
Division of Energy Technology1. Journal Articles


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