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25th GREEN Open Seminar

Schedules 2013.01.25 Finished


The 25th GREEN Open Seminar will be held at NIMS on January 25, 2013, to have a lecture by Dr. Naoaki Kuwata, Assistant Professor, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University.

Abstract

Fabrication and In situ Measurements of Solid-State Thin-Film Lithium Batteries

In this talk, fabrication technique of solid-state thin-film batteries (TFBs) using pulsed laser deposition (PLD) is reported. TFBs are fabricated by depositing layers of cathode, electrolyte and anode. We use several transition metal oxides (LiCoO2, LiMn2O4, and LiCoMnO4) as a cathode layer. As a solid electrolyte, amorphous lithium phosphate is deposited from ceramic Li3PO4 target. Although the oxide electrolytes show lower ionic conductivity than sulfides, the resistance of the electrolyte layer is small enough to operate thin-film batteries. The anode layer is selected by the electrochemical stability of electrolyte. Lithium metal can be used for L-P-O electrolyte.

 TFBs are also applied to a fundamental study of lithium intercalation in solid-state batteries. We use in situ Raman spectroscopy to measure the structural change of cathode materials (LiCoO2 and LiMn2O4) in TFBs. Detailed information of the phase transition is obtained related to lithium insertion/extraction in TFBs. Very slow movement of phase-boundary is also observed in solid-state batteries.


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Summary

Event Title
25th GREEN Open Seminar
Venue
Seminar room, 4F Collaborative Research Bldg., Namiki site, NIMS
Schedules Hours
2013.01.25
16:00-17:00

Contact

GREEN

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