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Article Dans Une Revue Particle & Particle Systems Characterization Année : 2013

Room-Temperature Synthesis of High Surface Area Anatase TiO2 Exhibiting a Complete Lithium Insertion Solid Solution

Résumé

The synthesis of highly divided anatase TiO2 nanoparticles displaying 300 m(2) g(-1) surface area is achieved by following a two-step synthetic process at room temperature. The particles exhibit a needle-like morphology composed of self-assembled 4 nm nanoparticles. The crystallization process from amorphous TiO2.1.6H(2)O to oriented aggregation of anatase TiO2 proceeds according to a slow solid dehydration process takingplace in a large range of pH in deionized water (1 < pH < 12) or alternatively when including a low amount of NH4F(aq) in solution. Driven by their high surface area enhancing the chemical/electrochemical reactivity, it is reported in the case of the anatase TiO2 that a modification in the lithium insertion mechanism is no longer attributable to a two-phase reaction between the two-end members Li epsilon TiO2 and Li0.5 +/- TiO2 when downsizing the particle size, but instead through a complete solid solution all along the composition range.

Domaines

Matériaux

Dates et versions

hal-01289768 , version 1 (17-03-2016)

Identifiants

Citer

Snehangshu Patra, Carine Davoisne, Stéphanie Bruyere, Houssny Bouyanfif, Sophie Cassaignon, et al.. Room-Temperature Synthesis of High Surface Area Anatase TiO2 Exhibiting a Complete Lithium Insertion Solid Solution. Particle & Particle Systems Characterization, 2013, 30 (12), pp.1093-1104. ⟨10.1002/ppsc.201300178⟩. ⟨hal-01289768⟩
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