Author(s)

Fei Gao, Maosong Fan, Baogui Tian, Kangkang Wang , Zhaolin Li, Hailei Zhao

Corresponding Author

Kangkang Wang

ABSTRACT

Nano-size anatase TiO2 is identified as an promising anode material for sodium-ion batteries. However, the chemical compatibility of nano-size TiO2 anode and the liquid electrolytes and its effects on discharge capacity and rate capability are still unknown. In this work, NaClO4-based and NaPF6-based liquid electrolytes are selected to study their effect on the electrochemical performance of anatase TiO2 anode. Our result demonstrates that NaClO4-based electrolyte leads to better cycling performance as compare to the NaPF6-based electrolyte. The discharge specific capacity for anatase TiO2 with NaClO4-based electrolyte at 1 C remains about 130 mAh g−1 after 150 cycles, whereas the specific capacity drastically dropped to 35 mAh g−1in NaPF6-based electrolyte. Furthermore, anatase TiO2 anode also shows better rate capability in NaClO4-based electrolyte than in NaPF6-based electrolyte.

KEYWORDS

Sodium-ion battery, anode, anatase TiO2, electrolyte