Research data supporting "Exfoliation of layered Na-ion anode material Na2Ti3O7 for enhanced capacity and cyclability"

We report the exfoliation of layered Na2Ti3O7, a promising anode material for Na-ion batteries, and restacking using HNO3 and NaOH to form H-[Ti3O7] and Na(x)-[Ti3O7] compositions, respectively. The materials were characterised by a range of techniques (SEM, TEM, solid-state NMR, XRD, PDF). Although the formation of aggregated nanoparticles is favoured under acidic restacking conditions, the use of basic conditions can lead to control over the adherence between the exfoliated layers. Pair distribution function (PDF) analysis confirms that the local TiO6 connectivity of the pristine material is maintained. The lowest sodium-containing Na(1)-[Ti3O7] phase, which is the stable product upon Na + leaching after consecutive washing steps, displays the best performance among the compositions studied, affording a stable reversible capacity of about 200 mAh.g -1 for 20 cycles at a C/20 rate. Washing removes the excess of 'free/reactive' Na + , which otherwise forms inactive Na2CO3 in the insufficiently-washed compositions.

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Exfoliation of Layered Na-Ion Anode Material Na₂Ti₃O₇ for Enhanced Capacity and Cyclability

Tsiamtsouri

Allan

Pell

et al. 2018

Chem. Mater.

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Research data supporting "Exfoliation of layered Na-ion anode material Na2Ti3O7 for enhanced capacity and cyclability"

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Exfoliation of Layered Na-Ion Anode Material Na₂Ti₃O₇ for Enhanced Capacity and Cyclability

Exfoliation of Layered Na-Ion Anode Material Na₂Ti₃O₇ for Enhanced Capacity and Cyclability

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Research data supporting "Exfoliation of layered Na-ion anode material Na2Ti3O7 for enhanced capacity and cyclability"

Cited by 1 publication

References 0 publications

Exfoliation of Layered Na-Ion Anode Material Na2Ti3O7 for Enhanced Capacity and Cyclability

Exfoliation of Layered Na-Ion Anode Material Na2Ti3O7 for Enhanced Capacity and Cyclability

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Product

Resources

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Exfoliation of Layered Na-Ion Anode Material Na₂Ti₃O₇ for Enhanced Capacity and Cyclability

Exfoliation of Layered Na-Ion Anode Material Na₂Ti₃O₇ for Enhanced Capacity and Cyclability