Pt/LiCoO2/LiPON/Cu와 Pt/LiCoO2/LiPON/LiCoO2/Cu 구조를 갖는 Li-free 박막전지
Li-free Thin-Film Batteries with Structural Configuration of Pt/LiCoO2/LiPON/Cu and Pt/LiCoO2/LiPON/LiCoO2/Cu
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All solid state thin film batteries with two types of cell structure, Pt / LiCoO2 / LiPON / Cu and Pt / LiCoO2 / LiPON / LiCoO2 / Cu, are prepared and their electrochemical performances are investigated to evaluate the effect of LiCoO2 interlayer at the interface of LiPON / Cu. The crystallinity of the deposited LiCoO2 thin films is confirmed by XRD and Raman analysis. The crystalline LiCoO2 cathode thin film is obtained and LiCoO2 as the interlayer appears to be amorphous. The surface morphology of Cu current collector after cycling of the batteries is observed by AFM. The presence of a 10 nm-thick layer of LiCoO2 at the interface of LiPON / Cu enhances the interfacial adhesion and reduces the interfacial resistance. As a result, Li plating / stripping at the interface of LiPON / Cu during charge/discharge reaction takes place more uniformly on Cu current collector, while without the interlayer of LiCoO2 at the interface of LiPON / Cu, the Li plating / stripping is localized on current collector. The thin film batteries with the interlayer of LiCoO2 at the interface of LiPON / Cu exhibits enhanced initial coulombic efficiency, reversible capacity and cycling stability. The thickness of the anode current collector Cu also appears to be crucial for electrochemical performances of all solid state thin film batteries.
Abstract
All solid state thin film batteries with two types of cell structure, Pt / LiCoO2 / LiPON / Cu and Pt / LiCoO2 / LiPON / LiCoO2 / Cu, are prepared and their electrochemical performances are investigated to evaluate the effect of LiCoO2 interlayer at the interface of LiPON / Cu. The crystallinity of the deposited LiCoO2 thin films is confirmed by XRD and Raman analysis. The crystalline LiCoO2 cathode thin film is obtained and LiCoO2 as the interlayer appears to be amorphous. The surface morphology of Cu current collector after cycling of the batteries is observed by AFM. The presence of a 10 nm-thick layer of LiCoO2 at the interface of LiPON / Cu enhances the interfacial adhesion and reduces the interfacial resistance. As a result, Li plating / stripping at the interface of LiPON / Cu during charge/discharge reaction takes place more uniformly on Cu current collector, while without the interlayer of LiCoO2 at the interface of LiPON / Cu, the Li plating / stripping is localized on current collector. The thin film batteries with the interlayer of LiCoO2 at the interface of LiPON / Cu exhibits enhanced initial coulombic efficiency, reversible capacity and cycling stability. The thickness of the anode current collector Cu also appears to be crucial for electrochemical performances of all solid state thin film batteries.
참고문헌 (11)
- J.B. Bates, "Electrical properties of amorphous lithium electrolyte thin films", Solid State Ionics, 53-56, pp.647~654 (1992)[DOI]
- B. Wang, "Characterization of Thin- Film Rechargeable Lithium Batteries with Lithium Cobalt Oxide Cathodes", J. Electrochem. Soc., 143, pp.3203~3213 (1996)[DOI]
- S.H. Lee, "Lithium Thin-Film Battery with a Reversible Structural Configuration SS", Li, <TEX>$LixV_2O_5$<, pp.TEX>, Cu[DOI]
- Y. Iriyama, "Charge-Transfer Reaction at the Lithium Phosphorus Oxynitride Glass Electrolyte", Lithium Manganese Oxide Thin-Film Interface and Its Stability on Cycling, 2006, pp.153, A821~A825
- S.-W. Song, "High rate-induced structural changes in thin-film lithium batteries on flexible substrate", J. Power Sources, 195, pp.8275~8279 (2010)[DOI]
- B. Fleutot, "Characterization of all-solid-state Li", LiPONB, J. Power Sources, pp.2011, 196[DOI]
- B.J. Neudecker, ""Lithium?Free" Thin?Film Battery with In Situ Plated Li Anode", J. Electrochem. Soc., 147, pp.517~523 (2000)[DOI]
- Y. Sabi, "Senoo, <TEX>$LiCoO_{2}$<", TEX> as Anode Protection Layer for Thin-Film Lithium-ion Battery, 2010, ~
- Y. Sabi, "A Novel Anode Protection Layer for Thin-Film Rechargeable Lithium Battery", 217th ECS Meeting (2010)
- A.R. Miedema, "The heat of formation of alloys", Philips Technol. Rev., 36(8), pp.217~231 (1976)
- Shin-Wook Jeon, "As-deposited <TEX>$LiCoO_{2}$<", TEX> thin film cathodes prepared by rf magnetron sputtering, 2005, pp.51(10), 268~273