Article Dans Une Revue Journal of the American Chemical Society Année : 2013

Low-potential sodium insertion in a NASICON-type structure through the Ti(III)/Ti(II) redox couple

Résumé

We report the direct synthesis of powder Na3Ti2(PO4)3 together with its low-potential electrochemical performance and crystal structure elucidation for the reduced and oxidized phases. First-principles calculations at the density functional theory level have been performed to gain further insight into the electrochemistry of Ti(IV)/Ti(III) and Ti(III)/Ti(II) redox couples in these sodium superionic conductor (NASICON) compounds. Finally, we have validated the concept of full-titanium-based sodium ion cells through the assembly of symmetric cells involving Na3Ti2(PO4)3 as both positive and negative electrode materials operating at an average potential of 1.7 V.

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Dates et versions

hal-00807295 , version 1 (03-04-2013)

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P. Senguttuvan, G. Rousse, M.E. Arroyo y de Dompablo, H. Vezin, J.-M. Tarascon, et al.. Low-potential sodium insertion in a NASICON-type structure through the Ti(III)/Ti(II) redox couple. Journal of the American Chemical Society, 2013, 135, pp.3897 - 3903. ⟨10.1021/ja311044t⟩. ⟨hal-00807295⟩
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