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Synthesis, structure, and electrochemical Li-ion intercalation of LiRu2O4 with CaFe2O4-type structure
- Synthesis, structure, and electrochemical Li-ion intercalation of LiRu2O4 with CaFe2O4-type structure
- Jung, YH[Jung, Young Hwa]; Kim, DK[Kim, Do Kyung]; Hong, ST[Hong, Seung-Tae]
- DGIST Authors
- Hong, ST[Hong, Seung-Tae]
- Issue Date
- Journal of Power Sources, 233, 285-289
- Article Type
- Ar Flows; Calcium Ferrite; Capacity Retention; Double Chain; Edge Sharing; Electrochemical Test; High Capacity; High Rate; Ion Exchange Reactions; Isostructural; Li Atoms; Li Intercalation; Lithium; Lithium Intercalation; Lithium Ruthenate; Ruthenates; Ruthenium Compounds; Sodium Ruthenate; Solid State Reactions; Synthesis (Chemical); Tunnel Structure; Tunnel Structures; Type Structures; X-Ray Rietveld Method
- 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.
- Elsevier B.V.
- Related Researcher
Hong, Seung Tae
Discovery Lab(Batteries & Materials Discovery Laboratory)
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- Energy Science and EngineeringDiscovery Lab(Batteries & Materials Discovery Laboratory)1. Journal Articles
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