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Updated: May 14, 2026

Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate
Published on: February 23, 2016
Low-potential sodium insertion in a NASICON-type structure through the Ti(III)/Ti(II) redox couple
P Senguttuvan1, G Rousse, M E Arroyo y de Dompablo
1Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), ALISTORE ERI European Research Institute, Campus de la Universitat Autònoma de Barcelona, E-08193 Bellaterra, Catalonia, Spain.
Abstract:
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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