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Biphase-Interface Enhanced Sodium Storage and Accelerated Charge Transfer: Flower-Like Anatase/Bronze TiO2/C as an Advanced Anode Material for Na-Ion Batteries

Journal Article


Abstract


  • Flower-like assembly of ultrathin nanosheets composed of anatase and bronze TiO2 embedded in carbon is successfully synthesized by a simple solvothermal reaction, followed with a high-temperature annealing. As an anode material in sodium-ion batteries, this composite exhibits outstanding electrochemical performances. It delivers a reversible capacity of 120 mA h g-1 over 6000 cycles at 10 C. Even at 100 C, there is still a capacity of 104 mA h g-1. Besides carbon matrix and hierarchical structure, abundant interfaces between anatase and bronze greatly enhance the performance by offering additional sites for reversible Na+ storage and improving the charge-transfer kinetics. The interface enhancements are confirmed by discharge/charge profiles, rate performances, electrochemical impedance spectra, and first-principle calculations. These results offer a new pathway to upgrade the performances of anode materials in sodium-ion batteries.

Publication Date


  • 2017

Citation


  • Chu, C., Yang, J., Zhang, Q., Wang, N., Niu, F., Xu, X., . . . Qian, Y. (2017). Biphase-Interface Enhanced Sodium Storage and Accelerated Charge Transfer: Flower-Like Anatase/Bronze TiO2/C as an Advanced Anode Material for Na-Ion Batteries. ACS Applied Materials and Interfaces, 9(50), 43648-43656. doi:10.1021/acsami.7b13382

Scopus Eid


  • 2-s2.0-85038624501

Start Page


  • 43648

End Page


  • 43656

Volume


  • 9

Issue


  • 50

Place Of Publication


Abstract


  • Flower-like assembly of ultrathin nanosheets composed of anatase and bronze TiO2 embedded in carbon is successfully synthesized by a simple solvothermal reaction, followed with a high-temperature annealing. As an anode material in sodium-ion batteries, this composite exhibits outstanding electrochemical performances. It delivers a reversible capacity of 120 mA h g-1 over 6000 cycles at 10 C. Even at 100 C, there is still a capacity of 104 mA h g-1. Besides carbon matrix and hierarchical structure, abundant interfaces between anatase and bronze greatly enhance the performance by offering additional sites for reversible Na+ storage and improving the charge-transfer kinetics. The interface enhancements are confirmed by discharge/charge profiles, rate performances, electrochemical impedance spectra, and first-principle calculations. These results offer a new pathway to upgrade the performances of anode materials in sodium-ion batteries.

Publication Date


  • 2017

Citation


  • Chu, C., Yang, J., Zhang, Q., Wang, N., Niu, F., Xu, X., . . . Qian, Y. (2017). Biphase-Interface Enhanced Sodium Storage and Accelerated Charge Transfer: Flower-Like Anatase/Bronze TiO2/C as an Advanced Anode Material for Na-Ion Batteries. ACS Applied Materials and Interfaces, 9(50), 43648-43656. doi:10.1021/acsami.7b13382

Scopus Eid


  • 2-s2.0-85038624501

Start Page


  • 43648

End Page


  • 43656

Volume


  • 9

Issue


  • 50

Place Of Publication