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Insight into the Origin of Capacity Fluctuation of Na2Ti6O13Anode in Sodium Ion Batteries

Journal Article


Abstract


  • The capacity fluctuation phenomenon during cycling, which is closely related with solid electrolyte interphase and plays a key role for the design for advanced electrode, could be frequently observed in the titanium-based anode. However, the underlying reason for capacity fluctuation still remains unclear with rare related reports. Here, the origin of capacity fluctuation is verified with a long-life Na 2 Ti 6 O 13 anode. The reaction mechanism, structural evolution and reaction kinetics during the reported sodiation/desodiation processes were carefully investigated. The gradually enhanced diffusion controlled contribution resulted in the capacity increasing. And the capacity decay could be ascribed to the irreversible reaction of metallic titanium formation and the increasing potential polarization. It is worth noting that sodium ions seem to partially reduce NTO to metallic state, which is irreversible. The present study can provide more information for the design of advanced Na 2 Ti 6 O 13 anode.

UOW Authors


  •   Wu, Chunjin (external author)
  •   Wu, Zhenguo (external author)
  •   Zhang, Xiaobing (external author)
  •   Rajagopalan, Ranjusha (external author)
  •   Zhong, Ben-He (external author)
  •   Xiang, Wei (external author)
  •   Chen, Mingzhe (external author)
  •   Li, Hongtai (external author)
  •   Chen, Tingru (external author)
  •   Wang, En-Hui (external author)
  •   Yang, Zu Guang (external author)
  •   Guo, Xiaodong (external author)

Publication Date


  • 2017

Citation


  • Wu, C., Wu, Z., Zhang, X., Rajagopalan, R., Zhong, B., Xiang, W., Chen, M., Li, H., Chen, T., Wang, E., Yang, Z. & Guo, X. (2017). Insight into the Origin of Capacity Fluctuation of Na2Ti6O13Anode in Sodium Ion Batteries. ACS Applied Materials and Interfaces, 9 (50), 43596-43602.

Scopus Eid


  • 2-s2.0-85038860687

Number Of Pages


  • 6

Start Page


  • 43596

End Page


  • 43602

Volume


  • 9

Issue


  • 50

Place Of Publication


  • United States

Abstract


  • The capacity fluctuation phenomenon during cycling, which is closely related with solid electrolyte interphase and plays a key role for the design for advanced electrode, could be frequently observed in the titanium-based anode. However, the underlying reason for capacity fluctuation still remains unclear with rare related reports. Here, the origin of capacity fluctuation is verified with a long-life Na 2 Ti 6 O 13 anode. The reaction mechanism, structural evolution and reaction kinetics during the reported sodiation/desodiation processes were carefully investigated. The gradually enhanced diffusion controlled contribution resulted in the capacity increasing. And the capacity decay could be ascribed to the irreversible reaction of metallic titanium formation and the increasing potential polarization. It is worth noting that sodium ions seem to partially reduce NTO to metallic state, which is irreversible. The present study can provide more information for the design of advanced Na 2 Ti 6 O 13 anode.

UOW Authors


  •   Wu, Chunjin (external author)
  •   Wu, Zhenguo (external author)
  •   Zhang, Xiaobing (external author)
  •   Rajagopalan, Ranjusha (external author)
  •   Zhong, Ben-He (external author)
  •   Xiang, Wei (external author)
  •   Chen, Mingzhe (external author)
  •   Li, Hongtai (external author)
  •   Chen, Tingru (external author)
  •   Wang, En-Hui (external author)
  •   Yang, Zu Guang (external author)
  •   Guo, Xiaodong (external author)

Publication Date


  • 2017

Citation


  • Wu, C., Wu, Z., Zhang, X., Rajagopalan, R., Zhong, B., Xiang, W., Chen, M., Li, H., Chen, T., Wang, E., Yang, Z. & Guo, X. (2017). Insight into the Origin of Capacity Fluctuation of Na2Ti6O13Anode in Sodium Ion Batteries. ACS Applied Materials and Interfaces, 9 (50), 43596-43602.

Scopus Eid


  • 2-s2.0-85038860687

Number Of Pages


  • 6

Start Page


  • 43596

End Page


  • 43602

Volume


  • 9

Issue


  • 50

Place Of Publication


  • United States