1. Accelerated Lanthanide Intercalation into Graphite Catalyzed by Na.
- Author
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Iyo A, Fujihisa H, Gotoh Y, Ishida S, Eisaki H, Ogino H, and Kawashima K
- Abstract
Lanthanides ( Ln ) are notoriously difficult to intercalate into graphite. We investigated the possibility of using Na to catalyze the formation of Ln -intercalated graphite and successfully synthesized Ln C
6 ( Ln = Sm, Eu, and Yb) significantly rapidly in high yields. The synthesis process involves the formation of the reaction intermediate NaCx , through the mixing of Na and C, which subsequently reacts with Ln upon heating to form Ln C6 . Well-sintered Ln C6 pellets with low residual Na concentrations ( Ln :Na ≈ 98:2) were fabricated by the two-step method. The pellets enabled the evaluation of Ln C6 by powder X-ray diffraction and electrical resistivity measurements. This study highlights the versatility of the Na-catalyzed method and lays the foundation for the rapid mass production of Ln C6 , with potential applications in superconducting and rechargeable battery materials.- Published
- 2024
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