Superionic conductivity in the Li4C60 fulleride polymer

M. Riccò, M. Belli, M. Mazzani, D. Pontiroli, D. Quintavalle, A. Jánossy, G. Csányi

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We report on the extraordinary superionic conductivity in the fulleride polymer Li4C60, a crystalline material with no disorder. Li7, NMR, and dc frequency dependent conductivity show uncorrelated ionic hopping across small energy barriers (ΔEa∼200meV) and an ionic conductivity of 10-2S/cm at room temperature, higher than in "standard" ionic conductors. Ab initio calculations of the molecular structure find intrinsic unoccupied interstitial sites that can be filled by Li+ cations in stoichiometric Li4C60 even at low temperatures. The low energy required for the occupation of these sites allows a sizable Li+ diffusion above 130 K. The results suggest novel application of lithium intercalated fullerides as electrodes in Li ions batteries.

Original languageEnglish
Article number145901
JournalPhysical review letters
Issue number14
Publication statusPublished - Apr 6 2009


ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Riccò, M., Belli, M., Mazzani, M., Pontiroli, D., Quintavalle, D., Jánossy, A., & Csányi, G. (2009). Superionic conductivity in the Li4C60 fulleride polymer. Physical review letters, 102(14), [145901].