Ultrathin Ti2Nb2O9 Nanosheets with Pseudocapacitive Properties as Superior 
Anode for Sodium-Ion Batteries

Shen, L.; Wang, Y.; Lv, H.; Chen, S.; van Aken, P. A.; Wu, X.; Maier, J.; Yu, Y.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Ultrathin Ti₂Nb₂O₉ Nanosheets with Pseudocapacitive Properties as Superior Anode for Sodium-Ion Batteries

MPS-Authors

/persons/resource/persons280640

Wang, Y.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280611

van Aken, P. A.
Scientific Facility Stuttgart Center for Electron Microscopy (Peter A. van Aken), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280673

Wu, X.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons217129

Maier, J.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Shen, L., Wang, Y., Lv, H., Chen, S., van Aken, P. A., Wu, X., et al. (2018). Ultrathin Ti₂Nb₂O₉ Nanosheets with Pseudocapacitive Properties as Superior Anode for Sodium-Ion Batteries. Advanced Materials, 30(51): 1804378.

Cite as: https://hdl.handle.net/21.11116/0000-000E-D338-5

Abstract

Sodium-ion batteries are emerging as promising candidates for grid energy storage because of the abundant sodium resources and low cost. However, the identification and development of suitable anode materials is far from being satisfactory. Here, it is demonstrated that the Ti2Nb2O9 nanosheets with tunnel structure can be used as suitable anode materials for sodium-ion batteries. Ti2Nb2O9 nanosheets are synthesized by liquid exfoliation combined with topotactic dehydration, delivering a high reversible capacity of 250 mAh g(-1) at 50 mA g(-1) at a suitable average voltage of approximate to 0.7 V. It is found that a low energy diffusion barrier, enlarged interlayer spacing, and exceptional nanoporosity together give rise to high rate performance characterized by pseudocapacitive behavior. The observed high reversible capacity, excellent rate capability, and good cyclability of Ti2Nb2O9 nanosheets make this material competitive when compared to other sodium insertion anode materials.