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Synthesis, structure, and electrochemical Li-ion intercalation of LiRu2O4 with CaFe2O4-type structure

Title
Synthesis, structure, and electrochemical Li-ion intercalation of LiRu2O4 with CaFe2O4-type structure
Authors
Jung, YH[Jung, Young Hwa]Kim, DK[Kim, Do Kyung]Hong, ST[Hong, Seung-Tae]
DGIST Authors
Hong, ST[Hong, Seung-Tae]
Issue Date
2013-07-01
Citation
Journal of Power Sources, 233, 285-289
Type
Article
Article Type
Article
Keywords
Ar FlowsCalcium FerriteCapacity RetentionDouble ChainEdge SharingElectrochemical TestHigh CapacityHigh RateIon Exchange ReactionsIsostructuralLi AtomsLi IntercalationLithiumLithium IntercalationLithium RuthenateRuthenatesRuthenium CompoundsSodium RuthenateSolid State ReactionsSynthesis (Chemical)Tunnel StructureTunnel StructuresType StructuresX-Ray Rietveld Method
ISSN
0378-7753
Abstract
A new material, LiRu2O4, has been synthesized by ion-exchange reaction from NaRu2O4 that has been prepared by solid state reaction at 950 °C under Ar flow. The crystal structure of LiRu2O4, isostructural with the parent NaRu 2O4, has been refined by an X-ray Rietveld method (Pnma, a = 9.13940(5) b = 2.80070(9) c = 11.0017(1) Z = 4, Rp = 5.30%, wRp = 6.73%, χ2 = 0.41, 23 °C). The structure belongs to CaFe2O4-type, where double chains of edge-sharing octahedral RuO6 share the corners with neighboring double chains and form tunnels in between them parallel to the shortest b-axis so that the one-dimensional Li array is placed inside each of the tunnels. Detailed structural analysis indicates that the tunnel inside has more than enough space to be filled with the Li atoms. The electrochemical tests of LiRu2O4 demonstrates a reversible Li intercalation reaction at 3.2-3.5 V vs. Li/Li+ with a capacity of ∼80 mAhg -1. The material exhibits excellent high-rate characteristics (93% capacity retention at 10C/1C) as well as high capacity retention with cycles (99% at 50 cycles). © 2013 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2429
DOI
10.1016/j.jpowsour.2013.01.119
Publisher
Elsevier B.V.
Related Researcher
  • Author Hong, Seung Tae Discovery Lab(Batteries & Materials Discovery Laboratory)
  • Research Interests
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringDiscovery Lab(Batteries & Materials Discovery Laboratory)1. Journal Articles


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