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Molecular Crystal Electrolytes with High Lithium Ion Conductivity

Moriya and Hitosugi et al. have developed an organic molecular crystal, Li(FSA)(SN)2, composed of Li(FSA) and succinonitrile (SN). Since its molecular crystal exhibits high lithium ion conductivity due to a new ionic conduction mechanism, it is expected to be applied as a solid electrolyte for all-solid-state batteries. Although polymer electrolytes such as organic solid electrolyte generally show a rapid decrease in ionic conductivity at low temperatures, the molecular crystal maintains high ionic conductivity even at low temperatures. Its conductivity at -20 °C (10-5 Scm-1) is about 100 times higher than that of previously reported materials. In addition, this molecular crystal has a low melting point (59.5 °C) and crystalizes again when cooled after melting, which makes it possible to fabricate thin-film all-solid-state batteries through a process of melting and crystallization. It has been confirmed that all-solid-state batteries with this solid electrolyte indeed operate with high charge-discharge efficiency, providing a new direction to the development of all-solid-state batteries.

Molecular Crystal Electrolytes with High Lithium Ion Conductivity

Related Products

L0281
Li(FSA)
S0109
Succinonitrile (SN)

References

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