Accelerated Lanthanide Intercalation into Graphite Catalyzed by Na
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912061805559808 |
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| author | Iyo, Akira Fujihisa, Hiroshi Gotoh, Yoshito Ishida, Shigeyuki Eisaki, Hiroshi Ogino, Hiraku Kawashima, Kenji |
| author_facet | Iyo, Akira Fujihisa, Hiroshi Gotoh, Yoshito Ishida, Shigeyuki Eisaki, Hiroshi Ogino, Hiraku Kawashima, Kenji |
| contents | 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 NaC$_x$, through the mixing of Na and C, which subsequently reacts with $Ln$ upon heating to form $Ln$C$_6$. Well-sintered $Ln$C$_6$ pellets with low residual Na concentrations ($Ln$:Na = 98:2) were fabricated by the two-step method. The pellets enabled the evaluation of $Ln$C$_6$ 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 $Ln$C$_6$, with potential applications in superconducting and rechargeable battery materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01624 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Accelerated Lanthanide Intercalation into Graphite Catalyzed by Na Iyo, Akira Fujihisa, Hiroshi Gotoh, Yoshito Ishida, Shigeyuki Eisaki, Hiroshi Ogino, Hiraku Kawashima, Kenji Materials Science Superconductivity 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 NaC$_x$, through the mixing of Na and C, which subsequently reacts with $Ln$ upon heating to form $Ln$C$_6$. Well-sintered $Ln$C$_6$ pellets with low residual Na concentrations ($Ln$:Na = 98:2) were fabricated by the two-step method. The pellets enabled the evaluation of $Ln$C$_6$ 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 $Ln$C$_6$, with potential applications in superconducting and rechargeable battery materials. |
| title | Accelerated Lanthanide Intercalation into Graphite Catalyzed by Na |
| topic | Materials Science Superconductivity |
| url | https://arxiv.org/abs/2409.01624 |