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Int. J. Electroactive Mater. 2 (2014) 17-21

Preparation of Sintered Li5La3Nb2O12 Garnet-type Li Ion Conductor via Spark Plasma Sintering Synthesis

Masashi Kotobuki*, Masaki Koishi

Material and Environmental engineering, Hakodate Natinal College of Technology, Hokkaido, Japan
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Abstract : Spark Plasma Sintering (SPS) synthesis can sinter ceramics powders quickly at a relatively low temperature. In this study, the SPS synthesis is applied for preparation of sintered Li5La3Nb2O12 (LLNb) pellet which is a member of fast Li ion conductor with garnet structure. Well-sintered LLNb pellet is obtained by the SPS synthesis at 1000 oC only for 5 min, although the sintered pellet cannot be obtained in conventional sintering process using electric furnace at same temperature for 6 h. The Li ion conductivity of the sintered pellet is 6.0 × 10-6 S cm-1, which is same order as that of the conventional method. It is concluded that the SPS synthesis can be applied to prepare the garnet-type Li ion conductor.

Keywords : solid electrolyte ,garnet-type Li ion conductor,spark plasma sintering,lithium batter