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One-dimensional yolk-shell Sb@Ti-O-P nanostructures as a high-capacity and high-rate anode material for sodium ion batteries

Journal Article


Abstract


  • Development of high energy/power density and long cycle life of anode materials is highly desirable for sodium ion batteries, because graphite anode cannot be used directly. Sb stands out from the potential candidates, due to high capacity, good electronic conductivity, and moderate sodiation voltage. Here, one-dimensional yolk-shell Sb@Ti-O-P nanostructures are synthesized by reducing core-shell Sb2O3@TiO2 nanorods with NaH2PO2. This structure has Sb nanorod as the core to increase the capacity and Ti-O-P as the shell to stabilize the interface between electrolyte and electrode material. The gap between the core and the shell accommodates the volume change during sodiation/desodiation. These features endow the structure outstanding performances. It could deliver a capacity of about 760 mA h g-1 after 200 cycles at 500 mA g-1, with a capacity retention of about 94%. Even at 10 A g-1, the reversible capacity is still at 360 mA h g-1. The full battery of Sb@Ti-O-P//Na3V2(PO4)3-C presents a high output voltage (���2.7 V) and a capacity of 392 mA h g-1 anode after 150 cycles at 1 A g-1 anode.

UOW Authors


  •   Bai, Zhongchao (external author)
  •   Wang, Nana

Publication Date


  • 2017

Citation


  • Wang, N., Bai, Z., Qian, Y., & Yang, J. (2017). One-dimensional yolk-shell Sb@Ti-O-P nanostructures as a high-capacity and high-rate anode material for sodium ion batteries. ACS Applied Materials and Interfaces, 9(1), 447-454. doi:10.1021/acsami.6b13193

Scopus Eid


  • 2-s2.0-85016318882

Start Page


  • 447

End Page


  • 454

Volume


  • 9

Issue


  • 1

Place Of Publication


Abstract


  • Development of high energy/power density and long cycle life of anode materials is highly desirable for sodium ion batteries, because graphite anode cannot be used directly. Sb stands out from the potential candidates, due to high capacity, good electronic conductivity, and moderate sodiation voltage. Here, one-dimensional yolk-shell Sb@Ti-O-P nanostructures are synthesized by reducing core-shell Sb2O3@TiO2 nanorods with NaH2PO2. This structure has Sb nanorod as the core to increase the capacity and Ti-O-P as the shell to stabilize the interface between electrolyte and electrode material. The gap between the core and the shell accommodates the volume change during sodiation/desodiation. These features endow the structure outstanding performances. It could deliver a capacity of about 760 mA h g-1 after 200 cycles at 500 mA g-1, with a capacity retention of about 94%. Even at 10 A g-1, the reversible capacity is still at 360 mA h g-1. The full battery of Sb@Ti-O-P//Na3V2(PO4)3-C presents a high output voltage (���2.7 V) and a capacity of 392 mA h g-1 anode after 150 cycles at 1 A g-1 anode.

UOW Authors


  •   Bai, Zhongchao (external author)
  •   Wang, Nana

Publication Date


  • 2017

Citation


  • Wang, N., Bai, Z., Qian, Y., & Yang, J. (2017). One-dimensional yolk-shell Sb@Ti-O-P nanostructures as a high-capacity and high-rate anode material for sodium ion batteries. ACS Applied Materials and Interfaces, 9(1), 447-454. doi:10.1021/acsami.6b13193

Scopus Eid


  • 2-s2.0-85016318882

Start Page


  • 447

End Page


  • 454

Volume


  • 9

Issue


  • 1

Place Of Publication